Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011js in NGC 1103.
S. Howerton, Arkansas City, KS,
U.S.A.; A. J. Drake, S. G. Djorgovski, A. Mahabal,
M. J. Graham, and R. Williams, California Institute
of Technology; J. L. Prieto, Princeton University;
M. Catelan, Pontificia Universidad Catolica de
Chile; R. H. McNaught and G. Garradd, Australian
National University; E. C. Beshore and S. M. Larson,
Lunar and Planetary Laboratory, University of
Arizona; and E. Christensen, Gemini Observatory,
report the discovery of an apparent supernova
in public images from the Catalina Sky Survey
(CSS).
The variable was designated PSN J02480496-1357511
when it was posted at the Central Bureau's TOCP
webpage and is here designated SN 2011js based
on the spectroscopic confirmation reported below.
After posting on the TOCP, the following independent
discovery report was received.
J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, R.
Cartier, F. Forster, S. Silva, F. Carrasco, P.
Sanchez, C. Hervias, and R. Ramirez, Universidad
de Chile; G. Pignata, M. Cifuentes, Y. Apostolovski,
and M. Vidal, Universidad Andres Bello; C. Farias
and F. Aros, Pontificia Universidad Catolica de
Chile; B. Conuel, Wesleyan University; G. Folatelli,
IPMU, University of Tokyo; and D. Reichart, K.
Ivarsen, J. Haislip, A. Crain, D. Foster, M. Nysewander,
and A. LaCluyze, University of North Carolina
at Chapel Hill, on behalf of the CHASE project
(which is part of the Millennium Center for Supernova
Science collaboration), report the discovery of
an apparent supernova (mag approximately 17.1)
on an unfiltered image taken on Dec. 31.10 UT
with the 0.41-m 'PROMPT 4' telescope located at
Cerro Tololo. The new object is located at R.A.
= 2h48m05s.07 +/- 0".2, Decl. = -13o57'53".1 +/-
0".2 (equinox 2000.0), which is about 14".7 west
and 22".1 south of the center of the galaxy NGC
1103.
Additional CCD magnitudes for 2011js (unfiltered
unless noted otherwise): 2011 Jan. 2.1-Nov. 19.1
UT, [20.5 (CHASE, thirteen stacked 80-s images);
Oct. 30.25, [20.2 (CSS); Nov. 17.28, 19.4 (CSS);
29.11, [18.0 (CHASE); 2012 Jan. 1.059, 17.1 (Joseph
Brimacombe, Cairns, Australia; remotely using
a 51-cm RCOS telescope + STL11K camera + luminance
filter at the New Mexico Skies Observatory near
Mayhill, NM, U.S.A.; position end figures 05s.04,
53".0; image posted at URL http://www.flickr.com/photos/43846774@N02/6614195023/);
1.07, 16.3 (CHASE).
J. M. Silverman and A. V. Filippenko, University
of California, Berkeley, report that inspection
of a CCD spectrum (range 340-1000 nm), obtained
on Jan. 3 UT with the Shane 3-m reflector (+ Kast
spectrograph) at Lick Observatory, shows that
PSN J02480496-1357511 = SN 2011js is a young type-II
supernova. The spectrum consists of a blue, nearly
featureless continuum along with somewhat broad
Balmer emission lines (FWHM about 2000 km/s for
H-alpha; less for H-beta). There are also unresolved
emission lines, probably from a superposed H II
region having relatively low metallicity.
M. Stritzinger, Oskar Klein Centre, Stockholm
University; A. Pastorello, Istituto Nazionale
di Astrofisica, Osservatorio Astronomico di Padova;
and G. Pignata, Universidad Andres Bello, on behalf
of the Millennium Center for Supernova Science,
report that they obtained a spectrum on Jan. 2.4
UT of PSN J02480496-1357511 = SN 2011js with the
Gemini-South telescope (+ GMOS). The variable
appears to be a type-IIn supernova near peak brightness.
The spectrum exhibits a prevalent blue continuum
with narrow emission features attributed to H_alpha,
H_beta, and Na I D (the latter overimposed on
a broad feature). Faint and narrow lines associated
with Ca II (H & K) are discernible in absorption,
while features related to the Ca II near-infrared
triplet (including a very broad component) are
tentatively identified. The overall appearance
of this object is reminiscent of the early-epoch
spectra of SN 1998S (Fassia et al. 2001, MNRAS
325, 907).
(C) Copyright 2012 CBAT 2012 January 07 (CBET 2969) Daniel W. E. Green
Descubierta el 31/12/2011, Magnitud 17.1.
Encontrada en NGC 1103, R.A. = 2h48m05s.07, Decl. = -13°57'53".1.
Localización 14".7 Oeste y 22".1 Sur del centro de NGC 1103.
Tipo II. PGC 10597.
Electronic Telegram No. 2957
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011jl in NGC 3354.
G. Pignata, M. Cifuentes, Y. Apostolovski,
and M. Vidal, Universidad Andres Bello; J. Maza,
M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier,
F. Forster, S. Silva, F. Carrasco, P. Sanchez,
C. Hervias, and R. Ramirez, Universidad de Chile;
C. Farias and F. Aros, Pontificia Universidad
Catolica de Chile; B. Conuel, Wesleyan University;
G. Folatelli, IPMU, University of Tokyo; and D.
Reichart, K. Ivarsen, J. Haislip, A. Crain, D.
Foster, M. Nysewander, and A. LaCluyze, University
of North Carolina at Chapel Hill, on behalf of
the CHASE project (which is part of the Millennium
Center for Supernova Science collaboration), report
the discovery of an apparent supernova (mag approximately
15.0) on an unfiltered image taken on Nov. 27.28
UT with the 0.41-m 'PROMPT 4' telescope located
at Cerro Tololo. The new object is located at
R.A. = 10h43m02s.95 +/- 0".2, Decl. = -36o21'52".4
+/- 0".2 (equinox 2000.0), which is about 0".5
east and 8".0 south of the center of the galaxy
NGC 3354. The variable was designated PSN J10430295-3621524
when it was posted at the Central Bureau's TOCP
webpage and is here designated SN 2011jl based
on the spectroscopic confirmation reported below.
Additional CCD magnitudes for 2011jl (unfiltered
unless otherwise noted): 2010 Mar. 28.3-2011 Feb.
22.2 UT, [19.5 (eleven stacked CHASE images);
Apr. 30.03, [18.0 (CHASE); Nov. 29.35, 15.0 (CHASE);
30.522, 15.5 (Joseph Brimacombe, Cairns, Australia;
remotely using a 51-cm RCOS telescope + STL11K
camera + luminance filter at the New Mexico Skies
Observatory near Mayhill, NM, U.S.A.; position
end figures 02s.98, 51".4; image posted at website
URL http://www.flickr.com/photos/43846774@N02/6432698047/);
Dec. 21.668, 15.3 (Brimacombe; infrared filter,
bandpass > 700 nm; image posted at website URL
http://www.flickr.com/photos/43846774@N02/6558284013/).
R. J. Foley and W. Fong, Harvard-Smithsonian Center
for Astrophysics, report that they have obtained
a spectrogram (range 400-1000 nm) of PSN J10430295-3621524
= SN 2011jl on Dec. 27.4 UT with the Magellan
Baade telescope (+ IMACS). SN 2011jl appears to
be a type-Ic supernova around 2-4 weeks after
maximum light. Cross-correlation with a library
of supernova spectra using SNID (Blondin and Tonry
2007, Ap.J. 666, 1024) provides reasonable matches
with SN 1991N at 12 and 28 days after maximum
brightness.
(C) Copyright 2011 CBAT 2011 December 28 (CBET 2957) Daniel W. E. Green
Descubierta el 27/11/2011, Magnitud 15.0.
Encontrada en NGC 3354, R.A. = 10h43m02s.95, Decl. = -36°21'52".4.
Localización 0".5 Este y 8".0 Sur del centro de NGC 3354.
Tipo Ic. PGC 31926.
Electronic Telegram No. 2921
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011ii in PGC 20555.
G. Pignata, M. Cifuentes, Y. Apostolovski,
and M. Vidal, Universidad Andres Bello; J. Maza,
M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier,
F. Forster, S. Silva, F. Carrasco, P. Sanchez,
C. Hervias, and R. Ramirez, Universidad de Chile;
C. Farias and F. Aros, Pontificia Universidad
Catolica de Chile; B. Conuel, Wesleyan University;
G. Folatelli, IPMU, University of Tokyo; and D.
Reichart, K. Ivarsen, J. Haislip, A. Crain, D.
Foster, M. Nysewander, and A. LaCluyze, University
of North Carolina at Chapel Hill, on behalf of
the CHASE project (which is part of the Millennium
Center for Supernova Science collaboration), report
the discovery of an apparent supernova (mag approximately
17.6) on an unfiltered CCD image taken on Nov.
15.31 UT with the 0.41-m 'PROMPT 5' telescope
located at Cerro Tololo. The new object is located
at R.A. = 7h16m34s.08 +/- 0".2, Decl. = -38°29'03".8
+/- 0".2 (equinox 2000.0), which is about 12".0
west and 11".2 north of the center of the galaxy
ESO 310-6 = PGC 20555. The variable was designated
PSN J07163408-3829038 when it was posted at the
Central Bureau's TOCP webpage and is here designated
SN 2011ii. Additional approximate CCD magnitudes
for 2011ii: Oct. 7.33, [18.5 (CHASE); Nov. 16.21,
17.0 (CHASE); 22.537, 16.8 (J. Brimacombe, Cairns,
Australia; infrared filter; bandpass > 700 nm;
position end figures 34s.03, 04".5). Brimacombe's
image is posted at the following website URL:
http://www.flickr.com/photos/43846774@N02/6386159609/.
F. Bufano, Istituto Nazionale di Astrofisica (INAF),
Osservatorio Astronomico di Catania; S. Benetti,
A. Pastorello, and S. Valenti, INAF, Osservatorio
Astronomico di Padova; and G. Pignata, Universidad
Andres Bello, on behalf of a larger collaboration,
report that a noisy spectrum of PSN J07163408-3829038
= SN 2011ii, obtained on Nov. 17.27 UT with the
New Technology Telescope (+ EFOSC2; range 360-930
nm; resolution 1.7 nm), shows it to be a type-Ib
supernova. A comparison of the observed spectrum
with a library of supernova spectra using the
"GELATO" code (Harutyunyan et al. 2008, A.Ap.
488, 383; available at URL https://gelato.tng.iac.es/login.cgi)
suggests that 2011ii is around maximum light.
(C) Copyright 2011 CBAT 2011 November 28 (CBET 2921) Daniel W. E. Green
Descubierta el 15/11/2011, Magnitud 17.6.
Encontrada en ESO 310-6,
R.A. = 07h16m34s.08, Decl. = -38°29'03".7.
Localización 12" Oeste y 11" Norte del centro de ESO 310-6.
Tipo Ib. PGC 20555.
Electronic Telegram No. 2913
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011ic.
J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, C. Hervias, and R. Ramirez,
Universidad de Chile; G. Pignata, M. Cifuentes,
Y. Apostolovski, and M. Vidal, Universidad Andres
Bello; C. Farias and F. Aros, Pontificia Universidad
Catolica de Chile; B. Conuel, Wesleyan University;
G. Folatelli, IPMU, University of Tokyo; and D.
Reichart, K. Ivarsen, J. Haislip, A. Crain, D.
Foster, M. Nysewander, and A. LaCluyze, University
of North Carolina at Chapel Hill, on behalf of
the CHASE project (which is part of the Millennium
Center for Supernova Science collaboration), report
the discovery of an apparent supernova (mag approximately
16.0) on unfiltered images taken on Nov. 18.30
and 20.33 UT with the 0.41-m 'PROMPT 5' telescope
located at Cerro Tololo. The new object is located
at R.A. = 10h15m33s.21 +/- 0".2, Decl. = -20°34'06".0
+/- 0".2 (equinox 2000.0), which is about 7".5
east and 55".4 north of the center of the presumed
host galaxy. Nothing is visible at this position
on archival images taken on May 15.98 (limiting
mag 18.5). The variable was designated PSN J10153321-2034060
when it was posted on the Central Bureau's TOCP
webpage and is here designated SN 2011ic based
on the spectroscopic confirmation reported below.
M. Stritzinger, Oskar Klein Centre, Stockholm
University, on behalf of the Millennium Center
for Supernova Science, reports that he obtained
a spectrogram on May 21.2 UT of PSN J10153321-2034060
= SN 2011ic with the Gemini-South telescope (+
GMOS). The spectrum reveals 2011ic to be a type-Ia
supernova around a month past maximum. Comparison
with a library of supernova spectra using the
SNID program (Blondin and Tonry 2007, Ap.J. 666,
1024) provides excellent matches with SN 2002bo
between 40 and 50 days past maximum.
(C) Copyright 2011 CBAT 2011 November 23 (CBET 2913) Daniel W. E. Green
Descubierta el 18/11/2011, Magnitud 17.3.
Encontrada en LEDA 154979, R.A.= 10h15m33s.20, Decl. = -20°34'06".0.
Localización 7".5 Este y 55".4 Norte del centro de LEDA 154979.
Tipo Ia. PGC 29950.
Electronic Telegram No. 2904
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011hu in PGC 19254.
J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, C. Hervias, and R. Ramirez,
Universidad de Chile; G. Pignata, M. Cifuentes,
Y. Apostolovski, and M. Vidal, Universidad Andres
Bello; C. Farias and F. Aros, Pontificia Universidad
Catolica de Chile; B. Conuel, Wesleyan University;
G. Folatelli, IPMU, University of Tokyo; and D.
Reichart, K. Ivarsen, J. Haislip, A. Crain, D.
Foster, M. Nysewander, and A. LaCluyze, University
of North Carolina at Chapel Hill, on behalf of
the CHASE project (which is part of the Millennium
Center for Supernova Science collaboration), report
the discovery of an apparent supernova (mag approximately
17.4) on an unfiltered image taken on Nov. 6.29
UT with the 0.41-m 'PROMPT 1' telescope located
at Cerro Tololo. The new object is located at
R.A. = 6h33m40s.85 +/- 0".2, Decl. = -34°16'26".7
+/- 0".2 (equinox 2000.0), which is about 8".7
west and 8".9 south of center of the galaxy PGC
19254 = ESO 365-29. The variable was designated
PSN J06334085-3416267 when it was posted at the
Central Bureau's TOCP webpage and is here designated
SN 2011hu based on the spectroscopic confirmation
reported below. Additional CCD magnitudes for
2011hu: 2010 Mar. 11.15, [18.5 (CHASE); 2011 Oct.
22.28, [18.0 (CHASE); Nov. 8.18, 17.2 (CHASE);
13.583, 17.8 (J. Brimacombe, Cairns, Australia;
infrared filter, wavelength > 700 nm; position
end figures 40s.96, 26".8; image posted at http://www.flickr.com/photos/43846774@N02/6341667615/).
J. Anderson and T. De Jaeger, Universidad de Chile;
and G. Pignata, Universidad de Andres Bello, on
behalf of the Millennium Center for Supernova
Science, report on optical spectroscopy (range
390-910 nm) of PSN J06334085-3416267 = SN 2011hu
that was obtained on Nov. 15.3 UT with the Magellan
II Clay 6.5-m telescope (+ LDSS3) at Las Campanas
Observatory. Cross-correlation with a library
of supernova spectra using the "Supernova Identification"
code (SNID; Blondin and Tonry 2007, Ap.J. 666,
1024) gives best matches with the peculiar type-Ia
supernova 1991bg, a few weeks past maximum.
(C) Copyright 2011 CBAT 2011 November 18 (CBET 2904) Daniel W. E. Green
Descubierta el 06/11/2011, Magnitud 17.4.
Encontrada en ESO 365-29, R.A.= 06h33m40s.84, Decl. = -34°16'26".7.
Localización 9" Oestey 9" Norte del centrode ESO 365-29.
Tipo Ia. PGC 19254.
Electronic Telegram No. 2900
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011hq MCG -02-13-37.
G. Pignata, M. Cifuentes, Y. Apostolovski,
and M. Vidal, Universidad Andres Bello; J. Maza,
M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier,
F. Forster, S. Silva, F. Carrasco, P. Sanchez,
C. Hervias, and R. Ramirez, Universidad de Chile;
C. Farias and F. Aros, Pontificia Universidad
Catolica de Chile; B. Conuel, Wesleyan University;
G. Folatelli, IPMU, University of Tokyo; and D.
Reichart, K. Ivarsen, J. Haislip, A. Crain, D.
Foster, M. Nysewander, and A. LaCluyze, University
of North Carolina at Chapel Hill, on behalf of
the CHASE project (which is part of the Millennium
Center for Supernova Science collaboration), report
the discovery of an apparent supernova (mag approximately
18.3) on an unfiltered image taken on Nov. 1.30
UT with the 0.41-m 'PROMPT 3' telescope located
at Cerro Tololo. The new object, which is also
present at mag approximately 18.4 in an image
taken on Nov. 2.12, is located at R.A. = 5h00m56s.13
+/- 0".2, Decl. = -13°24'57".9 +/- 0".2 (equinox
2000.0), which is about 11".9 east and 21".9 north
of center of the galaxy MCG -02-13-37. Nothing
is visible at this position in fifteen stacked
archival images taken between 2010 Jan. 1.13 and
Dec. 20.19 (limiting mag 20.0).
J. Anderson and T. De Jaeger, Universidad de Chile;
and G. Pignata, Universidad de Andres Bello, on
behalf of the Millennium Center for Supernova
Science, report on optical spectroscopy (range
450-880 nm) of 2011hq that was obtained on Nov.
16.3 UT with the SOAR telescope (+ Goodman instrument).
Cross-correlation with a library of supernova
spectra using the "Supernova Identification" code
(SNID; Blondin and Tonry 2007, Ap.J. 666, 1024)
gives good matches to type-Ia supernovae a few
months past maximum light.
(C) Copyright 2011 CBAT 2011 November 06 (CBET 2900) Daniel W. E. Green
Descubierta el 02/11/2011, Magnitud 18.3.
Encontrada en MCG -02-13-37,
R.A. = 05h00m56s.13, Decl. = -13°24'57".9.
Localización 11",9 Este y 21",9 Norte del centro de MCG -02-13-37.
Tipo Ia. PGC 16552.
Electronic Telegram No. 2872
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011gz.
J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, S. Silva, F. Carrasco,
P. Sanchez, C. Hervias, D. Iturra, and R. Ramirez,
Universidad de Chile; G. Pignata and M. Cifuentes,
Universidad Andres Bello; C. Farias, Pontificia
Universidad Catolica de Chile; B. Conuel, Wesleyan
University; G. Folatelli, IPMU, University of
Tokyo; and D. Reichart, K. Ivarsen, J. Haislip,
A. Crain, D. Foster, M. Nysewander, and A. LaCluyze,
University of North Carolina at Chapel Hill, on
behalf of the CHASE project (which is part of
the Millennium Center for Supernova Science collaboration),
report the discovery of an apparent supernova
(mag approximately 15.9) on an unfiltered image
taken on Oct. 3.02 UT with the 0.41-m 'PROMPT
3' telescope located at Cerro Tololo. The new
object, which is also present at mag approximately
15.7 in an image taken on Oct. 6.03, is located
at R.A. = 0h37m46s.27 +/- 0".2, Decl. = -33°39'51".4
+/- 0".2 (equinox 2000.0), which is about 0".1
west and 0".3 north of center of the presumed
host galaxy. Nothing is visible at this position
on archival images taken on 2010 Oct. 23.12 and
30.09 (limiting mag 18.0). The object was designated
PSN J00374627-3339514 when it was posted on the
Central Bureau's TOCP webpage and is here designated
SN 2011gz based on the spectroscopic confirmation
reported below.
G. Pignata, Universidad Andres Bello; J. Anderson,
T. De Jaeger and S. Gonzalez Universidad de Chile
on behalf of the Millennium Center for Supernova
Science, report on optical spectroscopy (range
350-880 nm) of PSN J00374627-3339514 = SN 2011gz,
obtained on Oct. 17.1 UT with the SOAR telescope
(+ Goodman instrument). Cross-correlation with
a library of supernova spectra using the "Supernova
Identification" code (SNID; Blondin and Tonry
2007, Ap.J. 666, 1024) gives good matches to type-Ia
supernovae about a week after B-band maximum brigthness.
(C) Copyright 2011 CBAT 2011 October 25 (CBET 2872) Daniel W. E. Green
Descubierta el 03/10/2011, Magnitud 16.9.
Encontrada en galaxia anónima,
R.A. = 00h37m46s.27, Decl. = -33°39'51".4.
Localización 0" Este y 0" Norte del centro de una galaxia anónima.
(cerca de ESO 350-G40)
Tipo Ia. PGC 02248.
Electronic Telegram No. 2869
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011gw in IC 2200.
G. Pignata and M. Cifuentes, Universidad
Andres Bello; J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, C. Hervias, D. Iturra,
and R. Ramirez, Universidad de Chile; C. Farias,
Pontificia Universidad Catolica de Chile; B. Conuel,
Wesleyan University; G. Folatelli, IPMU, University
of Tokyo; and D. Reichart, K. Ivarsen, J. Haislip,
A. Crain, D. Foster, M. Nysewander, and A. LaCluyze,
University of North Carolina at Chapel Hill, on
behalf of the CHASE project (which is part of
the Millennium Center for Supernova Science collaboration),
report the discovery of an apparent Supernova
(mag approximately 17.4) on an unfiltered image
taken on Sept. 15.36 UT with the 0.41-m 'PROMPT
3' telescope located at Cerro Tololo. The new
object, which is also present in an image taken
on Sept. 13.38 at mag approximately 17.2, is located
at R.A. = 7h28m17s.02 +/- 0".2, Decl. = -62°21'18".9
+/- 0".2 (equinox 2000.0), which is about 3".9
west and 8".0 south of center of the galaxy IC
2200. Nothing is visible at this position on archival
images taken on 2010 Dec. 22.16 (limiting mag
18.0) and 2010 Oct. 27.25 (limiting mag 17.5).
The variable was designated PSN J07281702-6221189
when it was posted on the Central Bureau's TOCP
webpage and is here designated SN 2011gw based
on the spectroscopic confirmation reported below.
P. Ochner, S. Valenti, S. Benetti, A. Pastorello,
and L. Tomasella, Istituto Nazionale di Astrofisica
(INAF), Osservatorio Astronomico di Padova; and
F. Bufano, INAF, Osservatorio Astronomico di Catania,
on behalf of a larger collaboration, report that
a spectrum of PSN J07281702-6221189 = SN 2011gw,
obtained on Oct. 20.33 UT with the New Technology
Telescope (+ EFOSC2; range 360-930 nm; resolution
1.8 nm), shows it to be a type-Ib/c supernova.
The best fits to this spectrum found by GELATO
(Harutyunyan et al. 2008, A.Ap. 488, 383; publicly
available at https://gelato.tng.iac.es) are with
spectra of type-Ib/c supernovae at about two months
post-maximum, after adopting a recessional velocity
of 3248 km/s for IC 2200 (Sekiguchi and Wolstencroft
1992, MNRAS 255, 581; via NED).
(C) Copyright 2011 CBAT 2011 October 22 (CBET 2869) Daniel W. E. Green
Descubierta el 15/09/2011, Magnitud 17.4.
Encontrada en IC 2200,
R.A. = 07h28m17s.02, Decl. = -62°21'18".8.
Localización 3".9 Oeste y 8".0 Sur del centro de IC 2200.
Tipo Ib/c. PGC 21075.
Electronic Telegram No. 2816
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011fo in ESO 400-33.
G. Pignata and M. Cifuentes, Universidad
Andres Bello; J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, C. Hervias, D. Iturra,
and R. Ramirez, Universidad de Chile; C. Farias,
Pontificia Universidad Catolica de Chile; B. Conuel,
Wesleyan University; G. Folatelli, IPMU, University
of Tokyo; and D. Reichart, K. Ivarsen, J. Haislip,
A. Crain, D. Foster, M. Nysewander, and A. LaCluyze,
University of North Carolina at Chapel Hill, on
behalf of the CHASE project (which is part of
the Millennium Center for Supernova Science collaboration),
report the discovery of an apparent supernova
(mag approximately 16.9) on an unfiltered CCD
image taken on Sept. 1.11 UT with the 0.41-m 'PROMPT
5' telescope located at Cerro Tololo. The new
object, which is also present at mag approximately
16.8 on an image taken on Sept. 2.98, is located
at R.A. = 20h30m15s.88 +/- 0".2, Decl. = -34°48'32".5
+/- 0".2 (equinox 2000.0), which is about 6".6
east and 10".7 north of center of the galaxy ESO
400-33. Nothing is visible at this position on
archival images taken on July 22.23 (limiting
mag 18.5) and Aug. 11.17 (limiting mag 18.0).
The new object was designated PSN J20301588-3448325
when it was posted on the Central Bureau's TOCP
webpage and is here designated SN 2011fo based
on the spectroscopic report below.
E. Cappellaro, S. Benetti, and A. Pastorello,
Istituto Nazionale di Astrofisica, Osservatorio
Astronomico di Padova; F. Bufano, Istituto Nazionale
di Astrofisica, Osservatorio Astronomico di Catania;
and G. Pignata, Universidad Andres Bello, on behalf
of a larger collaboration, report that a spectrogram
(range 330-750 nm; resolution 1.5 nm) of PSN J20301588-3448325
= SN 2011fo, obtained on Sept. 6.1 UT with the
European Southern Observatory's New Technology
Telescope (+ EFOSC), shows that 2011fo is a young,
heavily extinguished [E(B-V) about 0.7], type-II
supernova. After cross-correlation with a library
of supernova spectra via the "GELATO" code (Harutyunyan
et al. 2008, A.Ap. 488, 383; available at URL
https://gelato.tng.iac.es/login.cgi), the spectrum
appears similar that of SN 2009at few days after
explosion.
(C) Copyright 2011 CBAT 2011 September 31 (CBET 2816) Daniel W. E. Green
Descubierta
el 01/09/2011, Magnitud 16.9.
Encontrada en ESO 400-033,
R.A. = 20h30m15s.88, Decl. = -34°48'32".5.
Localización 6".6 Este y 10".7 Norte del
centro de ESO 400-033.
Tipo II. PGC 64827.
Electronic Telegram No. 2802
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011fj in IC 4523.
J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, C. Hervias, D. Iturra,
and R. Ramirez, Universidad de Chile; G. Pignata
and M. Cifuentes, Universidad Andres Bello; C.
Farias, Pontificia Universidad Catolica de Chile;
B. Conuel, Wesleyan University; G. Folatelli,
IPMU, University of Tokyo; and D. Reichart, K.
Ivarsen, J. Haislip, A. Crain, D. Foster, M. Nysewander,
and A. LaCluyze, University of North Carolina
at Chapel Hill, on behalf of the CHASE project
(which is part of the Millennium Center for Supernova
Science collaboration) report the discovery of
an apparent supernova (mag approximately 16.6)
on an unfiltered image taken on Aug. 28.09 UT
with the 0.41-m 'PROMPT 5' telescope located at
Cerro Tololo. The new object, which is also present
at mag approximately 16.1 in an image taken on
Aug. 29.04, is located at R.A. = 20h13m55s.16
+/- 0".2, Decl. = -1°09'22".2 +/- 0".2 (equinox
2000.0), which is about 11".3 east and 4".9 north
of center of the galaxy UGC 11527. Nothing is
visible at this position on archival images taken
on Aug. 24.99 (limiting mag 18.0) and Aug. 12.01
(limiting mag 18.5). The variable was designated
PSN J20135516-0109222 when it was posted at the
Central Bureau's TOCP webpage and is here designated
SN 2011fj based on the spectroscopic report below.
J. L. Prieto, Carnegie Observatories, reports
than an optical spectrum (range 370-930 nm; resolution
0.7 nm) of PSN J20135516-0109222 = SN 2011fj was
obtained on Aug. 30.1 UT with the du Pont 2.5-m
telescope (+ WFCCD) at Las Campanas Observatory.
The spectrum shows an almost-featureless blue
continuum and a faint, broad H-alpha emission
feature (FWHM approximately 14000 km/s), characteristic
of young type-II supernovae.
(C) Copyright 2011 CBAT 2011 August 31 (CBET 2802) Daniel W. E. Green
Descubierta
el 28/08/2011, Magnitud 16.1.
Encontrada en UGC 11527,
R.A. = 20h13m55s.15, Decl. = -01°09'22".2.
Localización 11".3 Este y 4".9 Norte del
centro de UGC 11527.
Tipo II.
PGC 64318.
Electronic Telegram No. 2732
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011dg in IC 4523.
G. Pignata and M. Cifuentes, Universidad
Andres Bello; J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, C. Hervias, D. Iturra,
and R. Ramirez, Universidad de Chile; C. Farias,
Pontificia Universidad Catolica de Chile; B. Conuel,
Wesleyan University; G. Folatelli, IPMU, University
of Tokyo; and D. Reichart, K. Ivarsen, J. Haislip,
A. Crain, D. Foster, M. Nysewander, and A. LaCluyze,
University of North Carolina at Chapel Hill, on
behalf of the CHASE project (which is part of
the Millennium Center for Supernova Science collaboration),
report the discovery of an apparent supernova
(mag approximately 17.0) on an unfiltered image
taken on May 18.24 UT with the 0.41-m 'PROMPT
1' telescope located at Cerro Tololo. The new
object (which was designated PSN J15050910-4330462
when posted on the Central Bureau's TOCP webpage
and is here designated SN 2011dg based on the
spectroscopic report below) is located at R.A.
= 15h05m09s.10 +/- 0".2, Decl. = -43°30'46".2
+/- 0".2 (equinox 2000.0), which is about 15".5
west and 12".4 south of the center of the galaxy
IC 4523. Additional CCD magnitudes for 2011dg:
2010 Apr. 13.24, [18.5 (CHASE); 2011 May 7.11,
[17.0 (CHASE); 19.00, 16.4 (CHASE); 22.666, 17.2
(Joseph Brimacombe, Coral Towers Observatory,
Cairns, Australia, 30-cm reflector + STL6K camera
+ red filter; ten 600-s stacked images; position
end figures 09s.12, 45".9). Brimacombe's image
is posted at the following website URL: http://www.flickr.com/photos/43846774@N02/5748616071/.
The type-IIP supernova 2010gh also appeared in
IC 4523 (cf. CBETs 2372, 2390).
M. Stritzinger, Oskar Klein Centre, Stockholm
University, on behalf of the Millennium Center
for Supernova Science, reports that he obtained
a spectrogram on May 29.4 UT of PSN J15050910-4330462
= SN 2011dg with the Gemini-South telescope (+
GMOS). The spectrum of 2011dg is consistent with
that of a normal type-IIP supernova at about two
weeks past explosion.
(C) Copyright 2011 CBAT 2011 May 31 (CBET 2732) Daniel W. E. Green
Descubierta
el 18/05/2011, Magnitud 17.0.
Encontrada en IC 4523, R.A. = 15h05m09s.10, Decl.
= -43°30'46".2.
Localización 15".5 Oeste y 12".4 Sur del
centro de IC 4523.
Tipo IIP. PGC 53845 .
Electronic Telegram No. 2727
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011dd in NGC 3178.
J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, C. Hervias, D. Iturra,
and R. Ramirez, Universidad de Chile;G. Pignata,
M. Cifuentes, Universidad Andres Bello; C. Farias,
Pontificia Universidad Catolica de Chile; B. Conuel,
Wesleyan University; G. Folatelli, IPMU, University
of Tokyo; and D. Reichart, K. Ivarsen, J. Haislip,
A. Crain, D. Foster, M. Nysewander, and A. LaCluyze,
University of North Carolina at Chapel Hill, on
behalf of the CHASE project (which is part of
the Millennium Center for Supernova Science collaboration)
report the discovery of an apparent supernova
(mag approximately 15.8) on an unfiltered image
taken on May 15.98 UT with the 0.41-m 'PROMPT
3' telescope located at Cerro Tololo. The new
object, was was designated PSN J10160965-1547351
when posted at the Central Bureau's TOCP webpage
and is here designated SN 2011dd based on the
spectroscopic report below, is located at R.A.
= 10h16m09s.65 +/- 0".2, Decl. = -15°47'35".1
+/- 0".2 (equinox 2000.0), which is about 6".9
east and 6".6 south of center of the galaxy NGC
3178. Additional magnitudes for 2011dd: Apr. 30.01,
[18.0 (CHASE); May 7.99, [18.0 (CHASE); 17.96,
14.7 (CHASE); 21.186, 16.0 (Joseph Brimacombe,
Cairns, Australia; remotely using a 51-cm RCOS
telescope + STL11K camera at New Mexico Skies
Observatory near Mayhill, NM, U.S.A.; position
end figures 09s.64, 36".0). Brimacombe's image
is posted at the following website URL: http://www.flickr.com/photos/43846774@N02/5742847522/.
J. Anderson and C. Gutierrez, Universidad de Chile;
and G. Pignata, Universidad Andres Bello, on behalf
of the Millennium Center for Supernova Science,
report on optical spectroscopy (range 3500-8800
nm) of PSN J10160965-1547351 = 2011dd, obtained
on May 26.9 UT with the SOAR telescope (+ Goodman).
Cross-correlation with a library of supernova
spectra using the "Supernova Identification" code
(SNID; Blondin and Tonry 2007, Ap.J. 666, 1024)
gives good matches to type-IIP supernovae about
two weeks after explosion.
(C) Copyright 2011 CBAT 2011 May 08 (CBET 2727) Daniel W. E. Green
Descubierta
el 15/05/2011, Magnitud 15.8.
Encontrada en NGC 3178,
R.A. = 10h16m09s.64, Decl. = -15°47'35".0 .
Localización 7" Este y 7" Sur del centro
de NGC 3178 .
Tipo IIP. PGC 29980 .
Electronic Telegram No. 2715
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011ce in NGC 6708.
J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, C. Hervias, and D. Iturra,
Universidad de Chile; G. Pignata and M. Cifuentes,
Universidad Andres Bello; C. Farias, Pontificia
Universidad Catolica de Chile; B. Conuel, Wesleyan
University; G. Folatelli, IPMU, University of
Tokyo; and D. Reichart, K. Ivarsen, J. Haislip,
A. Crain, D. Foster, M. Nysewander, and A. LaCluyze,
University of North Carolina at Chapel Hill, on
behalf of the CHASE project (which is part of
the Millennium Center for Supernova Science collaboration),
report the discovery of an apparent supernova
(mag approximately 15.8) on an unfiltered image
taken on Apr. 19.40 UT with the 0.41-m 'PROMPT
4' telescope located at Cerro Tololo. The new
object (which was designated PSN J18553580-5343290
when posted at the Central Bureau's TOCP webpage
and is here designated SN 2011ce based on the
spectroscopic report below) is located at R.A.
= 18h55m35s.84 +/- 0".2, Decl. = -53°43'29".1
+/- 0".2 (equinox 2000.0), which is about 2".2
east and 4".7 south of the center of the galaxy
NGC 6708. Additional CCD magnitudes for 2011ce:
2010 Sept. 11.01, [18.5 (PROMPT4 telescope); 2011
Mar. 4.36, [18.5 (PROMPT4 telescope); Mar. 26.35,
16.8 (PROMPT4 telescope); Apr. 20.32, 16.6 (0.5-m
CHASE500 telescope); 22.675, 17.2 (Joseph Brimacombe,
Coral Towers Observatory, Cairns, Australia; red
filter; position end figures 35s.84, 28".9). Brimacombe
has posted his image at the following website
URL: http://www.flickr.com/photos/43846774@N02/5644002805.
The type-Ia supernova 2004do also appeared in
NGC 6708 (cf. IAUC 8382).
J. Anderson, Universidad de Chile; N. Morrell,
Las Campanas Observatory; and G. Pignata, Universidad
Andres Bello, on behalf of the Millennium Center
for Supernova Science, report optical spectroscopy
(range 468-1005 nm) of PSN J18553580-5343290 =
SN 2011ce obtained on Apr. 23.2 UT with the Las
Campanas Baade telescope (+ IMACS). Cross-correlation
with a library of supernova spectra using the
"Supernova Identification" code (SNID; Blondin
and Tonry 2007, Ap.J. 666, 1024) gives best matches
with the peculiar type-Ia supernovae 2002cx and
2005hk at around 20 days past maximum.
(C) Copyright 2011 CBAT 2011 May 08 (CBET 2715) Daniel W. E. Green
Descubierta
el 19/04/2011, Magnitud 15.8.
Encontrada en NGC 6708,
R.A. = 18h55m35s.79, Decl. = -53°43'29".0.
Localización 2".2 Este y 4".7 Sur del centro
de NGC 6708 .
Tipo Ia-pec. PGC 62569 .
Electronic Telegram No. 2697
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011cd in MCG -02-52-11.
G. Pignata and M. Cifuentes, Universidad
Andres Bello; J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, C. Hervias, and D. Iturra,
Universidad de Chile; C. Farias, Pontificia Universidad
Catolica de Chile; B. Conuel, Wesleyan University;
G. Folatelli, IPMU, University of Tokyo; and D.
Reichart, K. Ivarsen, J. Haislip, A. Crain, D.
Foster, M. Nysewander, and A. LaCluyze, University
of North Carolina at Chapel Hill, on behalf of
the CHASE project (which is part of the Millennium
Center for Supernova Science collaboration), report
the discovery of an apparent supernova (mag approximately
17.7 +/- 0.4) on an unfiltered image taken on
Apr. 14.34 UT with the 0.41-m 'PROMPT 3' telescope
located at Cerro Tololo. The new object (which
was designated PSN J20321290-0843470 when posted
at the Central Bureau's TOCP webpage and is here
designated SN 2011cd based on the spectroscopic
report below) is located at R.A. = 20h32m12s.96
+/- 0".2, Decl. = -8º43'47".1 +/- 0".2 (equinox
2000.0), which is about 2".7 east and 14".3 north
of center of the galaxy MCG -02-52-11 (= PGC 64907).
Additional CCD magnitudes for 2011cd (unfiltered
unless otherwise noted): 2009 Sept. 25.03, [18.5
(CHASE/PROMPT); 2010 Mar. 28.38, [18.5 (CHASE/PROMPT);
2011 Apr. 16.36, 17.4 (CHASE/PROMPT); 20.470,
18.9 (Joseph Brimacombe, Cairns, Australia; remotely
using a 51-cm RCOS telescope + STL11K camera at
the New Mexico Skies Observatory near Mayhill,
NM, U.S.A.; position end figures 12s.96, 46".3);
22.779, 18.7 (Brimacombe; red filter; position
end figures 12s.95, 46".9). Brimacombe's Apr.
20 image is posted at website URL http://www.flickr.com/photos/43846774@N02/5639435949/;
his Apr. 22 image is posted at http://www.flickr.com/photos/43846774@N02/5645086959/.
M. Stritzinger, A. Jerkstrand, J. Sollerman, M.
Ergon; Oskar Klein Centre, Stockholm University;
and R. J. Foley; Harvard-Smithsonian Center for
Astrophysics, on the behalf of the Millenium Center
for Supernova Studies (Universidad de Chile),
report that they obtained a spectrogram on Apr.
28.2 UT of 2011cd with the Gemini-South telescope
(+ GMOS). The spectrum contains a rich number
of emission lines including, among others: numerous
Fe II lines between 400 and 550 nm; Mg I] at 451
nm; Na I D, possibly blended with He I 588-nm;
[O I] at 558 and 630/636 nm; H_alpha; Fe II at
715 nm; [Ca I] at 730 nm; O I at 777 nm; a prevalent
emission feature due to the Ca II near-infrared
triplet; and a tentative identification of He
I at 707 nm. All emission features except the
Ca lines show strong blueshifts, with H_alpha
showing the most pronounced blueshift of approximately
3500 km/s. The spectrum is consistent with that
of a type-II supernova at late phases.
(C) Copyright 2011 CBAT 2011 April 12 (CBET 2697) Daniel W. E. Green
Descubierta
el 14/04/2011, Magnitud 17.7.
Encontrada en MCG -2-52-11,
R.A. = 20h32m12s.89, Decl. = -08°43'47".0.
Localización 3" Este y 14" Norte del centro
de MCG -2-52-11.
Tipo II. PGC 64907.
Electronic Telegram No. 2697
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011bo in ESO 337-6.
J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, and C. Hervias, Universidad
de Chile; G. Pignata and M. Cifuentes, Universidad
Andres Bello; C. Farias, Pontificia Universidad
Catolica de Chile; B. Conuel, Wesleyan University;
G. Folatelli, IPMU, University of Tokyo; and D.
Reichart, K. Ivarsen, J. Haislip, A. Crain, D.
Foster, M. Nysewander, and A. LaCluyze, University
of North Carolina at Chapel Hill, on behalf of
the CHASE project (which is part of the Millennium
Center for Supernova Science collaboration), report
the discovery of an apparent supernova (mag approximately
17.6) on unfiltered images taken on Mar. 21.34
and 23.36 UT with the 0.41-m 'PROMPT 5' telescope
located at Cerro Tololo. The new object (which
was designated PSN J18593846-4145558 when posted
on the Central Bureau's TOCP webpage and is here
designated SN 2011bo based on the spectroscopic
report below) is located at R.A. = 18h59m38s.46
+/- 0".2, Decl. = -41º45'55".8 +/- 0".2 (equinox
2000.0), which is about 8".1 west and 9".3 south
of center of the galaxy ESO 337-6. Nothing is
visible at this position on archival images taken
prior to this year (limiting mag 18.5). Joseph
Brimacombe, Cairns, Australia, reports the following
unfiltered CCD magnitudes for 2011bo from images
taken remotely with a 40.6-cm RCOS telescope (+
U9000 camera) at the Macedon Ranges Observatory,
near Melbourne, Australia: Mar. 28.364 UT, 18.8
(position end figures 38s.61, 55".4); Apr. 6.784,
18.6 (position end figures 38s.60, 55".2). Brimacombe
has posted his images at URLs http://www.flickr.com/photos/43846774@N02/5575391553/
and http://www.flickr.com/photos/43846774@N02/5601625686/.
N. Morrell, Las Campanas Observatory; J. Anderson
and F. Forster, Universidad de Chile; and G. Pignata,
Universidad Andres Bello, on behalf of the Millennium
Center for Supernova Science, report that they
have obtained a spectrum (range 420-900 nm) of
PSN J18593846-4145558 = SN 2011bo on Mar. 29.4
UT with the Magellan Baade 6.5-m telescope (+
IMACS) at Las Campanas Observatory. The spectrum
indicates that 2011bo is a type-Ic supernova around
two weeks after maximum; comparison with template
spectra using the "Supernova Identification" code
(SNID; Blondin and Tonry 2007, Ap.J. 666, 1024)
provides a close match to that of SN 1991N at
twelve days after maximum light.
(C) Copyright 2011 CBAT 2011 April 12 (CBET 2697) Daniel W. E. Green
Descubierta
el 23/03/2011, Magnitud 17.6.
Encontrada en ESO 337-6,
R.A. = 18h59m38s.45, Decl. = -41°45'55".7.
Localización 8" Oeste y 9" Sur del centro
de ESO 337-6.
Tipo Ic. PGC 65653.
Electronic Telegram No. 2692
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011bj.
J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, C. Hervias, and D. Iturra,
Universidad de Chile; G. Pignata and M. Cifuentes,
Universidad Andres Bello; C. Farias, Pontificia
Universidad Catolica de Chile; B. Conuel, Wesleyan
University; G. Folatelli, IPMU, University of
Tokyo; and D. Reichart, K. Ivarsen, J. Haislip,
A. Crain, D. Foster, M. Nysewander, and A. LaCluyze,
University of North Carolina at Chapel Hill, on
behalf of the CHASE project (which is part of
the Millennium Center for Supernova Science collaboration),
report the discovery of an apparent supernova
(mag approximately 17.6) on an unfiltered images
taken on Apr. 3.37 and 4.40 UT with the 0.41-m
'PROMPT 3' telescope located at Cerro Tololo.
The new object (which was designated PSN J20522450-3335540
when posted on the Central Bureau's TOCP webpage
and is here designated SN 2011bj due to the spectroscopic
report below) is located at R.A. = 20h52m24s.51
+/- 0".2, Decl. = -33°35'54".1 +/- 0".2 (equinox
2000.0), which is about 8".9 west and 12".5 north
of center of the presumed host galaxy. Nothing
is visible at this position on archival images
taken on 2010 Oct. 11.14 and 24.10 (limiting mag
18.5).
N. Morrell, Las Campanas Observatory; P. Lira,
Universidad de Chile; and G. Pignata, Universidad
Andres Bello, on behalf of the Millennium Center
for Supernova Science, report optical spectroscopy
(range 360-920 nm) of PSN J20522450-3335540 =
SN 2011bj obtained on Apr. 6.3 UT with the Las
Campanas 2.5-m du Pont telescope (+ WFCCD). Cross-correlation
with a library of supernova spectra using the
"Supernova Identification" code (SNID; Blondin
and Tonry 2007, Ap.J. 666, 1024) shows that 2011bj
is a type-IIP supernova about a month after explosion.
(C) Copyright 2011 CBAT 2011 April 10 (CBET 2692) Daniel W. E. Green
Descubierta
el 03/04/2011, Magnitud 17.6.
Encontrada en galaxia anónima,
R.A. = 20h52m24s.50, Decl. = -33°35'54".0.
Localización 8".9 Oeste y 12".5 Norte del
centro de galaxia anónima. (cerca ESO
401-G19)
Tipo IIP. PGC 65624.
Electronic Telegram No. 2688
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011bf.
G. Pignata and M. Cifuentes, Universidad
Andres Bello; J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, and C. Hervias, Universidad
de Chile; C. Farias, Pontificia Universidad Catolica
de Chile; B. Conul, Wesleyan University; G. Folatelli,
IPMU, University of Tokyo; and D. Reichart, K.
Ivarsen, J. Haislip, A. Crain, D. Foster, M. Nysewander,
and A. LaCluyze, University of North Carolina
at Chapel Hill, on behalf of the CHASE project
(which is part of the Millennium Center for Supernova
Science collaboration) report the discovery of
an apparent supernova (mag approximately 16.7)
on an unfiltered image taken on Mar. 24.26 UT
with the 0.41-m 'PROMPT 5' telescope located at
Cerro Tololo. CTIO. The new object, which is also
present at mag approximately 16.9 in an image
taken on Mar. 25.11, is located at R.A. = 13h49m03s.23
+/- 0".2, Decl. = -28°03'59".6 +/- 0.2 (equinox
2000.0), which is about 7".7 west and 44".1 north
of center of the presumed host galaxy. Nothing
is visible at this position on archival images
taken on Jan. 15.29 and Feb. 17.30 (limiting mag
18.5). The variable was designated PSN J13490323-2803596
when posted on the Central Bureau's TOCP webpage
and is designated SN 2011bf here based on the
spectroscopic report below.
G. H. Marion, Harvard-Smithsonian Center for Astrophysics
(CfA), on behalf of the CfA Supernova Group, reports
that a spectrum (range 340-740 nm) of PSN J13490323-2803596
= SN 2011bf was obtained on Apr. 3 UT by Marion
with the F. L. Whipple Observatory 1.5-m telescope
(+ FAST). Cross-correlation with a library of
supernova spectra using the "Supernova Identification"
code (SNID; Blondin and Tonry 2007, Ap.J. 666,
1024) shows that 2011bf is a type-Ia supernova
a few days before maximum light. Using the SNID
redshift of z = 0.014, the velocity of the Si
II 635.5-nm feature is estimated to be approximately
12300 km/s.
(C) Copyright 2011 CBAT 2011 April 10 (CBET 2688) Daniel W. E. Green
Descubierta
el 24/03/2011, Magnitud 16.0.
Encontrada en galaxia anónima,
R.A. = 13h49m03s.23, Decl. = -28°03'59".5.
Localización 7".7 Oeste y 44".1 Norte del
centro de galaxia anónima.
Tipo Ia. PGC 49031.
Electronic Telegram No. 2683
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011bb.
G. Pignata and M. Cifuentes, Universidad
Andres Bello; J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, and C. Hervias, Universidad
de Chile; B. Conuel, Wesleyan University; G. Folatelli,
IPMU, University of Tokyo; and D. Reichart, K.
Ivarsen, J. Haislip, A. Crain, D. Foster, M. Nysewander,
and A. LaCluyze, University of North Carolina
at Chapel Hill, on behalf of the CHASE project
(which is part of the Millennium Center for Supernova
Science collaboration), report the discovery of
an apparent supernova (mag approximately 16.6)
on an unfiltered image taken on Mar. 14.08 UT
with the 0.41-m 'PROMPT 1' telescope located at
Cerro Tololo. The new object, which is also present
at mag approximately 17.0 in an image taken on
Mar. 8.18, is located at R.A. = 11h35m27s.09 +/-
0".3, Decl. = -38°00'54".9 +/- 0".3 (equinox 2000.0),
which is about 2".6 east and 0".7 north of center
of the presumed host galaxy. Nothing is visible
at this position on archival images taken on Feb.
28.15 (limiting mag 17.5) and Feb. 20.15 (limiting
mag 18.0). The variable was designated PSN J11352709-3800549
when posted at the Central Bureau's TOCP webpage
and is here designated SN 2011bb based on the
spectroscopic report below.
J. Anderson and F. Forster, Universidad de Chile;
and G. Pignata, Universidad Andres Bello, on behalf
of the Millennium Center for Supernova Science,
report on an optical spectrogram (range 355-896
nm) of PSN J11352709-3800549 = SN 2011bb that
was obtained on Mar. 28.07 UT with the SOAR telescope
(+ Goodman HTS). The spectrum shows 2011bb to
be a type-Ia supernova at about two weeks after
maximum light. Cross-correlation with a library
of supernova spectra using the "Supernova Identification"
code (SNID; Blondin and Tonry 2007, Ap.J. 666,
1024) provides good matches with SN 1995D at +14
days.
(C) Copyright 2011 CBAT 2011 April 07 (CBET 2683) Daniel W. E. Green
Descubierta
el 14/03/2011, Magnitud 16.6.
Encontrada en PGC 614263,
R.A. = 11h35m27s.09, Decl. = -38°00'54".9.
Localización 2".6 Este y 0".7 Norte del
centro de PGC 614263.
Tipo Ia. PGC 35861.
Electronic Telegram No. 2661
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011ah in ESO 364-12.
J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, and C. Hervias, Universidad
de Chile; G. Pignata and M. Cifuentes, Universidad
Andres Bello; B. Conuel, Wesleyan University;
G. Folatelli, IPMU, University of Tokyo; and D.
Reichart, K. Ivarsen, J. Haislip, A. Crain, D.
Foster, M. Nysewander, and A. LaCluyze, University
of North Carolina at Chapel Hill, on behalf of
the CHASE project (which is part of the Millennium
Center for Supernova Science collaboration), report
the discovery of an apparent supernova (mag approximately
16.0) on an unfiltered image taken on Feb. 5.15
UT with the 0.41-m 'PROMPT 1' telescope located
at Cerro Tololo. The new object (which was designated
PSN J05535077-3244442 when posted on the Central
Bureau's TOCP webpage, and which is here designated
SN 2011ah based on the spectroscopic report below)
is located at R.A. = 5h53m50s.77 +/- 0".2, Decl.
= -32o44'44".2 +/- 0".2 (equinox 2000.0), which
is about 15".6 west and 7".2 south of the center
of the galaxy ESO 364-12. Nothing is visible at
this position on archival images taken on 2010
Dec. 31.25 (limiting mag 18.5) and 2011 Jan. 16.19
(limiting mag 18.0).
J. Anderson and F. Forster, Universidad de Chile;
G. Pignata, Universidad Andres Bello; and G. Folatelli,
University of Tokyo, on behalf of the Millennium
Center for Supernova Science, report that they
have obtained a spectrum (range 420-900 nm) of
PSN J05535077-3244442 = SN 2011ah on Feb. 17.1
UT with the Magellan Baade 6.5-m telescope (+
IMACS) at Las Campanas Observatory. The spectrum
indicates that 2011ah is a type-Ia supernova around
a week after maximum; comparison with template
spectra using the "Supernova Identification" code
(SNID; Blondin and Tonry 2007, Ap.J. 666, 1024)
provides a close match to that of SN 1996C at
eight days after maximum light. Adopting a host-galaxy
recession velocity of 8094 km/s (Jones et al.
2009, 6DF Galaxy Survey Data Release 3) as reported
via the NASA/IPAC Extragalactic Database, an expansion
velocity of 12000 km/s is calculated from the
absorption minimum of the Si II 635.5-nm line.
(C) Copyright 2011 CBAT 2011 Febrary 28 (CBET 2661) Daniel W. E. Green
Descubierta
el 05/02/2011, Magnitud 16.0.
Encontrada en ESO 364-12,
R.A. = 05h53m50s.77, Decl. = -32°44'44".2.
Localización 15".6 Oeste y 7".2 Sur del
centro de ESO 364-12.
Tipo Ia. PGC 18059.
Electronic Telegram No. 2656
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011X, 2011Y, and 2011Z.
[Note: this text replaces that
on CBET 2652] G. Pignata and M. Cifuentes, Universidad
Andres Bello; J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, and C. Hervias, Universidad
de Chile; P. Gonzalez, Pontificia Universidad
Catolica de Chile (for SN 2011X only); B. Conuel,
Wesleyan University; G. Folatelli, IPMU, University
of Tokyo; and D. Reichart, K. Ivarsen, J. Haislip,
A. Crain, D. Foster, M. Nysewander, and A. LaCluyze,
University of North Carolina at Chapel Hill, on
behalf of the CHASE project, report the discovery
of three supernovae on unfiltered CCD images obtained
with the 0.41-m 'PROMPT' telescopes located at
Cerro Tololo; SN 2011X was found with the 'PROMPT
5' telescope, and the other two supernovae were
found with the 'PROMPT 3' telescope. The discovery
observations are tabulated below (positional uncertainty
in the range +/- 0".2 to 0".3 in each coordinate):
SN
2011
UT
R.A.
(2000.0)
Decl.
Mag.
Offset
2011X
Jan.
15.25
13
50 21.36
-52
39 58.5
17.3
63"
W, 20" S
2011Y
Jan.
27.07
8
12 58.25
-27
34 15.7
17.3
2011Z
Jan.
29.25
13
30 43.04
-20
57 14.0
16.1
1".0
W, 8".3 S
Additional approximate unfiltered CHASE magnitudes
for 2011X (designated PSN J13502136-5239585 on
the Central Bureau's TOCP webpage), which is thought
to be connected with the galaxy ESO 221-7 = PGC
49121: 2009 June 4.06-2010 Aug. 14.07 UT, [21.0
(thirty 40-s archival images taken over this time
span); 2011 Jan. 16.29, 17.2.
Additional approximate unfiltered CHASE magnitudes
for 2011Y (designated PSN J08125825-2734157 on
the Central Bureau's TOCP webpage), for which
the faintness of the presumed host galaxy does
not allow the measurement of reliable offsets
between the supernova's position and the center
of the galaxy: 2010 Dec. 31.23, [18.0; 2011 Jan.
8.18, [18.0; 28.05, 17.3.
Additional approximate unfiltered CHASE magnitudes
for 2011Z (designated PSN J13304304-2057140 on
the Central Bureau's TOCP webpage), which is thought
to be connected with the galaxy ESO 576-77 = PGC
47494: 2010 Feb. 11.29, [18.5; June 27.02, [17.0;
2011 Feb. 2.28, (visible, but no mag provided).
M. Stritzinger, Oskar Klein Centre, Stockholm
University; N. Morrell, Las Campanas Observatory;
J. Anderson, F. Foerster, and M. Hamuy, Universidad
de Chile; G. Pignata, Universidad Andres Bello;
and G. Folatelli, University of Tokyo; on behalf
of the Millennium Center for Supernova Science,
report that they have obtained spectra (range
432.5-965.9 nm) of these three supernovae on Mar.
5.1 UT with the Magellan I Baade 6.5-m telescope
(+ IMACS) at Las Campanas Observatory. The spectrum
of SN 2011X indicates that it is an evolved type-IIP
supernova; best matches with the "Supernova Identification"
code (SNID; Blondin and Tonry 2007, Ap.J. 666,
1024) suggest that 2011X is at least 3-4 months
old. SN 2011Y is a normal type-Ia supernova around
maximum light; adopting for the host galaxy a
recession velocity of 20385 km/s (as derived by
the SNID code, based on the spectral features
of the supernova), an expansion velocity of 11000
km/s is computed from the absorption minima of
the Si II 635.5-nm line.
SN 2011Z is a type-Ia supernova before maximum
light. Cross-correlation with a library of supernova
spectra using SNID provides a close match to the
sub-luminous supernova 1986G (Phillips et al.
1987, PASP 99, 592). Adopting a SNID-derived host
recession velocity of 6595 km/s, expansion velocities
of 10500 km/s and 11000 km/s are derived from
the absorption minima of the Si II 597.1- and
635.5-nm lines, respectively.
(C) Copyright 2011 CBAT 2011 Febrary 15 (CBET 2656) Daniel W. E. Green
Descubierta
el 29/01/2011, Magnitud 16.3.
Encontrada en ESO 576-77,
R.A. = 13h30m43s.04, Decl. = -20°57'14".0.
Localización 1".0 Oeste y 8".3 Sur del centro
de ESO 576-77.
Tipo Ia. PGC 47494.
Electronic Telegram No. 2656
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011X, 2011Y, and 2011Z.
[Note: this text replaces that
on CBET 2652] G. Pignata and M. Cifuentes, Universidad
Andres Bello; J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, and C. Hervias, Universidad
de Chile; P. Gonzalez, Pontificia Universidad
Catolica de Chile (for SN 2011X only); B. Conuel,
Wesleyan University; G. Folatelli, IPMU, University
of Tokyo; and D. Reichart, K. Ivarsen, J. Haislip,
A. Crain, D. Foster, M. Nysewander, and A. LaCluyze,
University of North Carolina at Chapel Hill, on
behalf of the CHASE project, report the discovery
of three supernovae on unfiltered CCD images obtained
with the 0.41-m 'PROMPT' telescopes located at
Cerro Tololo; SN 2011X was found with the 'PROMPT
5' telescope, and the other two supernovae were
found with the 'PROMPT 3' telescope. The discovery
observations are tabulated below (positional uncertainty
in the range +/- 0".2 to 0".3 in each coordinate):
SN
2011
UT
R.A.
(2000.0)
Decl.
Mag.
Offset
2011X
Jan.
15.25
13
50 21.36
-52
39 58.5
17.3
63"
W, 20" S
2011Y
Jan.
27.07
8
12 58.25
-27
34 15.7
17.3
2011Z
Jan.
29.25
13
30 43.04
-20
57 14.0
16.1
1".0
W, 8".3 S
Additional approximate unfiltered CHASE magnitudes
for 2011X (designated PSN J13502136-5239585 on
the Central Bureau's TOCP webpage), which is thought
to be connected with the galaxy ESO 221-7 = PGC
49121: 2009 June 4.06-2010 Aug. 14.07 UT, [21.0
(thirty 40-s archival images taken over this time
span); 2011 Jan. 16.29, 17.2.
Additional approximate unfiltered CHASE magnitudes
for 2011Y (designated PSN J08125825-2734157 on
the Central Bureau's TOCP webpage), for which
the faintness of the presumed host galaxy does
not allow the measurement of reliable offsets
between the supernova's position and the center
of the galaxy: 2010 Dec. 31.23, [18.0; 2011 Jan.
8.18, [18.0; 28.05, 17.3.
Additional approximate unfiltered CHASE magnitudes
for 2011Z (designated PSN J13304304-2057140 on
the Central Bureau's TOCP webpage), which is thought
to be connected with the galaxy ESO 576-77 = PGC
47494: 2010 Feb. 11.29, [18.5; June 27.02, [17.0;
2011 Feb. 2.28, (visible, but no mag provided).
M. Stritzinger, Oskar Klein Centre, Stockholm
University; N. Morrell, Las Campanas Observatory;
J. Anderson, F. Foerster, and M. Hamuy, Universidad
de Chile; G. Pignata, Universidad Andres Bello;
and G. Folatelli, University of Tokyo; on behalf
of the Millennium Center for Supernova Science,
report that they have obtained spectra (range
432.5-965.9 nm) of these three supernovae on Mar.
5.1 UT with the Magellan I Baade 6.5-m telescope
(+ IMACS) at Las Campanas Observatory. The spectrum
of SN 2011X indicates that it is an evolved type-IIP
supernova; best matches with the "Supernova Identification"
code (SNID; Blondin and Tonry 2007, Ap.J. 666,
1024) suggest that 2011X is at least 3-4 months
old. SN 2011Y is a normal type-Ia supernova around
maximum light; adopting for the host galaxy a
recession velocity of 20385 km/s (as derived by
the SNID code, based on the spectral features
of the supernova), an expansion velocity of 11000
km/s is computed from the absorption minima of
the Si II 635.5-nm line.
SN 2011Z is a type-Ia supernova before maximum
light. Cross-correlation with a library of supernova
spectra using SNID provides a close match to the
sub-luminous supernova 1986G (Phillips et al.
1987, PASP 99, 592). Adopting a SNID-derived host
recession velocity of 6595 km/s, expansion velocities
of 10500 km/s and 11000 km/s are derived from
the absorption minima of the Si II 597.1- and
635.5-nm lines, respectively.
(C) Copyright 2011 CBAT 2011 Febrary 15 (CBET 2656) Daniel W. E. Green
Descubierta
el 27/01/2011, Magnitud 17.3.
Encontrada en ESO 494-G35,
R.A. = 08h12m58s.25, Decl. = -27°34'15".6.
Localización 104".1 Oeste y 63".7 Sur del
centro de ESO 494-G35.
Tipo Ia. PGC 23020.
Electronic Telegram No. 2656
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011X, 2011Y, and 2011Z.
[Note: this text replaces that
on CBET 2652] G. Pignata and M. Cifuentes, Universidad
Andres Bello; J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, and C. Hervias, Universidad
de Chile; P. Gonzalez, Pontificia Universidad
Catolica de Chile (for SN 2011X only); B. Conuel,
Wesleyan University; G. Folatelli, IPMU, University
of Tokyo; and D. Reichart, K. Ivarsen, J. Haislip,
A. Crain, D. Foster, M. Nysewander, and A. LaCluyze,
University of North Carolina at Chapel Hill, on
behalf of the CHASE project, report the discovery
of three supernovae on unfiltered CCD images obtained
with the 0.41-m 'PROMPT' telescopes located at
Cerro Tololo; SN 2011X was found with the 'PROMPT
5' telescope, and the other two supernovae were
found with the 'PROMPT 3' telescope. The discovery
observations are tabulated below (positional uncertainty
in the range +/- 0".2 to 0".3 in each coordinate):
SN
2011
UT
R.A.
(2000.0)
Decl.
Mag.
Offset
2011X
Jan.
15.25
13
50 21.36
-52
39 58.5
17.3
63"
W, 20" S
2011Y
Jan.
27.07
8
12 58.25
-27
34 15.7
17.3
2011Z
Jan.
29.25
13
30 43.04
-20
57 14.0
16.1
1".0
W, 8".3 S
Additional approximate unfiltered CHASE magnitudes
for 2011X (designated PSN J13502136-5239585 on
the Central Bureau's TOCP webpage), which is thought
to be connected with the galaxy ESO 221-7 = PGC
49121: 2009 June 4.06-2010 Aug. 14.07 UT, [21.0
(thirty 40-s archival images taken over this time
span); 2011 Jan. 16.29, 17.2.
Additional approximate unfiltered CHASE magnitudes
for 2011Y (designated PSN J08125825-2734157 on
the Central Bureau's TOCP webpage), for which
the faintness of the presumed host galaxy does
not allow the measurement of reliable offsets
between the supernova's position and the center
of the galaxy: 2010 Dec. 31.23, [18.0; 2011 Jan.
8.18, [18.0; 28.05, 17.3.
Additional approximate unfiltered CHASE magnitudes
for 2011Z (designated PSN J13304304-2057140 on
the Central Bureau's TOCP webpage), which is thought
to be connected with the galaxy ESO 576-77 = PGC
47494: 2010 Feb. 11.29, [18.5; June 27.02, [17.0;
2011 Feb. 2.28, (visible, but no mag provided).
M. Stritzinger, Oskar Klein Centre, Stockholm
University; N. Morrell, Las Campanas Observatory;
J. Anderson, F. Foerster, and M. Hamuy, Universidad
de Chile; G. Pignata, Universidad Andres Bello;
and G. Folatelli, University of Tokyo; on behalf
of the Millennium Center for Supernova Science,
report that they have obtained spectra (range
432.5-965.9 nm) of these three supernovae on Mar.
5.1 UT with the Magellan I Baade 6.5-m telescope
(+ IMACS) at Las Campanas Observatory. The spectrum
of SN 2011X indicates that it is an evolved type-IIP
supernova; best matches with the "Supernova Identification"
code (SNID; Blondin and Tonry 2007, Ap.J. 666,
1024) suggest that 2011X is at least 3-4 months
old. SN 2011Y is a normal type-Ia supernova around
maximum light; adopting for the host galaxy a
recession velocity of 20385 km/s (as derived by
the SNID code, based on the spectral features
of the supernova), an expansion velocity of 11000
km/s is computed from the absorption minima of
the Si II 635.5-nm line.
SN 2011Z is a type-Ia supernova before maximum
light. Cross-correlation with a library of supernova
spectra using SNID provides a close match to the
sub-luminous supernova 1986G (Phillips et al.
1987, PASP 99, 592). Adopting a SNID-derived host
recession velocity of 6595 km/s, expansion velocities
of 10500 km/s and 11000 km/s are derived from
the absorption minima of the Si II 597.1- and
635.5-nm lines, respectively.
(C) Copyright 2011 CBAT 2011 Febrary 15 (CBET 2656) Daniel W. E. Green
Descubierta
el 15/01/2011, Magnitud 17.3.
Encontrada en ESO 221-G7, R.A.
= 13h50m21s.36, Decl. = -52°39'58".5.
Localización 63" Oeste y 20" Sur del centro
de ESO 221-G7.
Tipo IIP. PGC 49121.
Electronic Telegram No. 2641
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011N in ESO 120-16.
J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, and C. Hervias, Universidad
de Chile; G. Pignata and M. Cifuentes, Universidad
Andres Bello; P. Gonzalez, Pontificia Universidad
Catolica de Chile; B. Conuel, Wesleyan University;
G. Folatelli, Institute for the Physics and Mathematics
of the Universe (IPMU), University of Tokyo; and
D. Reichart, K. Ivarsen, J. Haislip, A. Crain,
D. Foster, M. Nysewander, and A. LaCluyze, University
of North Carolina at Chapel Hill, on behalf of
the CHASE project, report the discovery of an
apparent supernova (mag approximately 17.8 +/-
0.5) on an unfiltered image taken on Jan. 20.18
UT with the 0.41-m 'PROMPT 5' telescope located
at Cerro Tololo. The new object (which was designated
PSN J05513518-5902513 on the Central Bureau's
TOCP webpage and which is also present at mag
approximately 17.3 in an image taken on Jan. 21.05)
is located at R.A. = 05h51m35s.18 +/- 0".2, Decl.
= -59°02'51".3 +/- 0".2 (equinox 2000.0), which
is about 0".6 west and 7".4 south of the center
of the galaxy ESO 120-16. Nothing is visible at
this position on archival images taken on 2010
Dec. 20.27 and 2011 Jan. 12.07 (limiting mag 18.5).
I. Cosimo and F. Bufano, Istituto Nazionale di
Astrofisica (INAF), Osservatorio Astrofisico di
Catania; S. Benetti and S. Valenti, INAF, Osservatorio
Astronomico di Padova; A. Pastorello, Queen's
University, Belfast; and G. Pignata, Universidad
Andres Bello, on behalf of a larger collaboration,
report on a spectroscopic observation (range 365-925
nm; resolution 1.8 nm) of 2011N obtained on Jan.
25.05 UT with the EFOSC2 spectrograph mounted
on the New Technology Telescope at the European
Southern Observatory. The spectrum of 2011N is
that of a heavily reddened type-Ic supernova;
from a comparison with a library of supernova
spectra performed with the "GELATO" code (Harutyunyan
et al. 2008, A.Ap. 488, 383; available at the
following website URL: https://gelato.tng.iac.es/login.cgi),
2011N is found to be most similar to SN 2004aw
(Taubenberger et al. 2006, MNRAS 371, 1459) around
maximum light. A reddening of E(B-V) about 0.7
and a redshift of 0.01135, as derived from the
EW and position of the Na I D interstellar doublet,
respectively, have been assumed.
(C) Copyright 2011 CBAT 2011 Febrary 25 (CBET 2641) Daniel W. E. Green
Descubierta
el 20/01/2011, Magnitud 16.5.
Encontrada en ESO 120-16,
R.A. = 05h51m35s.18, Decl. = -59°02'51".3.
Localización 0".6 Oeste y 7".4 Sur del centro
de ESO 120-16.
Tipo Ic. PGC 18011.
Electronic Telegram No. 2626
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011C in UGC 6311.
J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
F. Carrasco, P. Sanchez, and C. Hervias, Universidad
de Chile; G. Pignata and M. Cifuentes, Universidad
Andres Bello; P. Gonzalez, Pontificia Universidad
Catolica de Chile; B. Conuel, Wesleyan University;
G. Folatelli, IPMU, University of Tokyo; and D.
Reichart, K. Ivarsen, J. Haislip, A. Crain, D.
Foster, M. Nysewander, and A. LaCluyze, University
of North Carolina at Chapel Hill, on behalf of
the CHASE project, report the discovery of an
apparent supernova (mag approximately 15.8) on
an unfiltered image taken on Jan. 5.30 UT with
the 0.41-m 'PROMPT 5' telescope located at Cerro
Tololo. The new object, which was confirmed at
mag approximately 15.4 in an image taken with
the 'PROMPT 5' telescope on Jan. 7.26, is located
at R.A. = 11h17m54s.88 +/- 0".3, Decl. = -2°05'45".2
+/- 0".3 (equinox 2000.0), which is about 1".4
west and 14".4 south of the center of the galaxy
UGC 6311. Nothing is visible at this position
on archival images taken on 2010 May 4.05 and
Dec. 17.30 (limiting mag 18.0).
Following posting on the Central Bureau's unconfirmed-objects
webpage, D. D. Balam, Dominion Astrophysical Observatory,
National Research Council of Canada; M. L. Graham,
Las Cumbres Observatory Global Telescope, University
of California at Santa Barbara; and E. Y. Hsiao,
Lawrence Berkeley Laboratory, report that a spectrogram
(range 385-694 nm, resolution 0.3 nm) of 2011C,
obtained on Jan. 8.58 UT with the 1.82-m Plaskett
Telescope of the National Research Council of
Canada, shows it to be a type-Ia supernova about
one week past maximum light. Cross-correlation
with a library of supernova spectra using the
"Supernova Identification" code (Blondin and Tonry
2007, Ap.J. 666, 1024) indicates that 2011C is
most similar to the type-Ia supernova 2003cg at
6 days past maximum; the redshift derived from
their fit is 0.025.
(C) Copyright 2011 CBAT 2011 January 09 (CBET 2626) Daniel W. E. Green
Descubierta
el 05/01/2011, Magnitud 15.4.
Encontrada en UGC 6311,
R.A. = 11h17m54s.88, Decl. = -02°05'45".2.
Localización 1".4 Oeste y 14".4 Sur del
centro de UGC 6311.
Tipo Ia. PGC 34521.
Electronic Telegram No. 2623
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge,MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
SUPERNOVA 2011A in NGC 4902.
G. Pignata and M. Cifuentes, Universidad
Andres Bello; J. Maza, M. Hamuy, R. Antezana,
L. Gonzalez, R. Cartier, F. Forster, S. Silva,
and F. Carrasco, Universidad de Chile; P. Gonzalez,
Pontificia Universidad Catolica de Chile; B. Conuel,
Wesleyan University; G. Folatelli, IPMU, University
of Tokyo; and D. Reichart, K. Ivarsen, J. Haislip,
A. Crain, D. Foster, M. Nysewander, and A. LaCluyze,
University of North Carolina at Chapel Hill, on
behalf of the CHASE project, report the discovery
of an apparent supernova (mag approximately 16.9)
on an unfiltered image taken on Jan. 2.30 UT with
the 0.41-m 'PROMPT 4' telescope located at Cerro
Tololo. The new object, which was confirmed at
mag approximately 16.6 on images taken with the
same telescope on Jan. 5.27 and 7.31, is located
at R.A. = 13h01m01s.19 +/- 0".2, Decl. = -14°31'34".8
+/- 0".2 (equinox 2000.0), which is about 21".3
east and 46".5 south of center of the galaxy NGC
4902. Nothing is visible at this position on archival
images taken on 2010 May 1.18 and July 13.05 (limiting
mag 18.5). SNe 1979E (cf. IAUC 3395) and 1991X
(cf. IAUC 5258, 5263, 5288) also appeared in NGC
4902.
M. Stritzinger, Oskar Klein Centre, Stockholm
University; J. L. Prieto and N. Morrell, Carnegie
Observatories; and G. Pignata, Universidad Andres
Bello, report that they obtained optical spectra
of 2011A on Jan. 4.2 and 4.7 UT with the du Pont
telescope (+ WFCCD) and the Gemini North telescope
(+ GMOS). This variable appears to be a type-IIn
supernova, most similar to supernova 2005cl (Kiewe
et al. 2010, http://lanl.arxiv.org/abs/1010.2689).
(C) Copyright 2011 CBAT 2011 January 08 (CBET 2623) Daniel W. E. Green
Descubierta
el 02/01/2011, Magnitud 16.9.
Encontrada en NGC 4902,
R.A. = 13h01m01s.19, Decl. = -14°31'34".8.
Localización 21".3 Este y 46".5 Sur del
centro de NGC 4902.
Tipo IIn. PGC 44847.