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 2013gc IN ESO 430-20 = PSN J08071188-2803263.
R. Antezana, M. Hamuy, L. Gonzalez, R. Cartier, F. Forster, and F.
Carrasco, Universidad de Chile; G. Pignata, Y. Apostolovski, E. Paillas, S.
Varela, F. Bufano, F. Olivares, and K. Takats, Universidad Andres Bello; F.
Aros, Pontificia Universidad Catolica de Chile; B. Conuel, Wesleyan
University; G. Folatelli, IPMU, University of Tokyo; and D. E. Reichart, J. B.
Haislip, J. P. Moore, and A. P. 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
Nov. 7.34 UT with the 0.41-m 'PROMPT 3' telescope located at Cerro Tololo.
The new object is located at R.A. = 8h07m11s.88 +/- 0".2, Decl. =
-28o03'26".3 +/- 0".2 (equinox 2000.0), which is about 43".3 east and 18".0
south of the center of the galaxy in ESO 430-20 (which also hosted SN 2013ak;
cf. CBET 3437). The variable is also present in an image taken on Nov. 8.25
at mag approximately 16.7, but nothing is visible at this position on
archival images taken on June 17.05 (limiting mag 20.2). The variable was
designated PSN J08071188-2803263 when it was posted at the Central Bureau's
TOCP webpage and is here designated SN 2013gc based on the spectroscopic
confirmation reported below.
N. Morrell, Las Campanas Observatory; and G. Pignata, Universidad Andres
Bello, on behalf of the Carnegie Supernova Project and the Millennium Center
for Supernova Science, report optical spectroscopy (range 360-920 nm) of PSN
J08071188-2803263 = SN 2013gc, obtained on Nov. 8.3 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 2013gc is a type-IIn supernova similar
to SN 1996L (Benetti et al. 1999, MNRAS 305, 811) at about two months after
explosion.
NOTE: These 'Central Bureau Electronic Telegrams'
are sometimes superseded by text appearing later
in the printed IAU Circulars.
(C) Copyright 2013 CBAT 2013 November 11 (CBET 3699)
Daniel W. E. Green
Supernova 2013gc
Descubierta el 07/11/2013, Magnitud 16.7.
Encontrada en ESO 430-20, R.A. = 23h03m21s.77, Decl. = -69°11'18".5 .
Localización 43".3 Este y 18".0 Sur del centro de ESO 430-20.
Tipo IIn. PGC 22788.
Electronic Telegram No. 3685
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 2013fx NEAR IC 5279.
G. Pignata, Y. Apostolovski, E. Paillas, S. Varela, F. Bufano, F.
Olivares, and K. Takats, Universidad Andres Bello; M. Hamuy, R. Antezana, L.
Gonzalez, R. Cartier, F. Forster, and F. Carrasco, Universidad de Chile; F.
Aros, Pontificia Universidad Catolica de Chile; B. Conuel, Wesleyan University;
G. Folatelli, IPMU, University of Tokyo; and D. E. Reichart, J. B. Haislip,
J. P. Moore, and A. P. 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 17.9) on an unfiltered image taken on Oct. 21.20
UT with the 0.41-m 'PROMPT 3' telescope located at Cerro Tololo. The new
object is located at R.A. = 23h03m21s.77 +/- 0".2, Decl. = -69o11'18".5 +/-
0".2 (equinox 2000.0), which is about 3".9 west and 0".5 north of center of
the presumed host galaxy. Additional CHASE magnitudes for 2013fx: Aug. 28.36,
[18.0; Oct. 26.04, 17.0.
S. Spiro, Istituto Nazionale di Astrofisica, Padova Astronomical
Observatory; N. Elias-Rosa, Istituto Nazionale di Astrofisica, Padova
Astronomical Observatory and Institut de Ciencies de l'Espai, IEEC, Consejo
Superior de Investigaciones Cientificas, Barcelona; M. Turatto, S. Benetti,
E. Cappellaro, and A. Pastorello, Istituto Nazionale di Astrofisica, Padova
Astronomical Observatory; M. Fraser, University of Cambridge; K. Maguire,
European Southern Observatory; S. Valenti, University of California at Santa
Barbara and Las Cumbres Observatory Global Telescope; S. Taubenberger, Max-
Planck-Institute fuer Astrophysik, Garching; S. J. Smartt, K. Smith, D. Young,
and C. Inserra, Queen's University, Belfast; M. Sullivan, University of
Southampton; and A. Gal-Yam, O. Yaron, and I. Manulis, Weizmann Institute for
Science, on behalf of the PESSTO (the Public ESO Spectroscopic Survey for
Transient Objects) collaboration (see Valenti et al., posted at website URL
http://www.astronomerstelegram.org/?read=4037), report that optical
spectroscopy of 2013fx, obtained on Oct. 27.15 UT with the New Technology
Telescope (+ EFOSC2; spectral range 360-910 nm), shows that it is a type-Ia
supernova at redshift z = 0.06, a few days before maximum light. The
classification was made via SNID (Blondin and Tonry 2007, Ap.J. 666, 102 4)
and GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383); PESSTO classification
spectra can be obtained from website URL http://www.pessto.org/.
NOTE: These 'Central Bureau Electronic Telegrams'
are sometimes superseded by text appearing later
in the printed IAU Circulars.
(C) Copyright 2013 CBAT 2013 October 30 (CBET 3685)
Daniel W. E. Green
Supernova 2013fx
Descubierta el 21/10/2013, Magnitud 17.9.
Encontrada en galaxia anónima, R.A. = 23h03m21s.77, Decl. = -69°11'18".5 .
Localización 0".0 Este y 0".0 Sur del centro de una galaxia anónima.
Tipo Ia. cerca de PGC 70335.
Electronic Telegram No. 3646
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 2013fe NEAR IC 1875 = PSN J03035325-3924202.
R. Antezana, M. Hamuy, L. Gonzalez, R. Cartier, F. Forster, S. Silva, F.
Carrasco, and R. Ramirez, Universidad de Chile; G. Pignata, Y. Apostolovski,
E. Paillas, S. Varela, F. Bufano, F. Olivares, and K. Takats, Universidad
Andres Bello; F. Aros, Pontificia Universidad Catolica de Chile; B. Conuel,
Wesleyan University; G. Folatelli, IPMU, University of Tokyo; and D. E.
Reichart, J. B. Haislip, J. P. Moore, and A. P. 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 14.4) on an unfiltered image
taken on Aug. 13.40 UT with the 0.41-m 'PROMPT 1' telescope located at Cerro
Tololo. The new object is located at R.A. = 03h03m53s.25 +/- 0".2, Decl. =
-39o24'20".2 +/- 0".2 (equinox 2000.0), which is more than 90" from all the
galaxies visible in the field, making difficult the determination of the host.
The variable was designated PSN J03035325-3924202 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2013fe based on the
spectroscopic confirmation reported below. Additional CCD magnitudes for
2013fe: July 2.36, [18.5 (CHASE); Aug. 16.26, 14.4 (CHASE); 17.31, 14.5
(CHASE); 19.776, 16.4 (J. Brimacombe, Cairns, Australia; 43-cm telescope +
infrared filter; bandpass > 700 nm; position end figures 53s.29, 20".4;
image posted at URL http://www.flickr.com/photos/43846774@N02/9554823083/);
20.60, V = 16.06 and I_c = 16.43 (Seiichiro Kiyota, Tsukuba, Japan; T30 0.5-m
iTelescope astrograph + FLI PL-6303E camera at Siding Spring; image posted at
website URL http://meineko.sakura.ne.jp/ccd/PSN_J03035325-3924202.jpg);
20.772, 16.4 (Brimacombe; position end figures 53s.29, 20".3; image posted at
URL http://www.flickr.com/photos/43846774@N02/9558464469/).
F. Bufano and G. Pignata, Universidad Andres Bello, on behalf of the
Millennium Center for Supernova Science collaboration, report that an optical
spectrogram (range 380-900 nm), obtained on Aug. 26.3 UT at the SOAR telescope
(+ Goodman Spectrograph) at Cerro Tololo, shows that PSN J03035325-3924202 =
SN 2013fe is a type-Ia supernova. Adopting the recession velocity of the
nearby galaxy, IC 1875 (6092 km/s; Lauberts and Valentijn 1989, Surface
Photometry Catalogue of the ESO-Uppsala Galaxies, Garching bei Muenchen:
European Southern Observatory; via NED), the best fit obtained via GELATO
(Harutyunyan et al. 2008, A.Ap. 488, 383; publicly available at website URL
https://gelato.tng.iac.es) to the 2013fe spectrum is with that of SN 1994D at
ten days after maximum.
NOTE: These 'Central Bureau Electronic Telegrams'
are sometimes superseded by text appearing later
in the printed IAU Circulars.
(C) Copyright 2013 CBAT 2013 September 02 (CBET 3646)
Daniel W. E. Green
Supernova 2013fe
Descubierta el 13/08/2013, Magnitud 14.4.
Encontrada en galaxia anónima, R.A. = 03h03m53s.25, Decl. =-39°24'20".2 .
Localización 0".0 Este y 0".0 Sur del centro de una galaxia anónima.
Tipo Ia. cerca de PGC 11549.
Electronic Telegram No. 3644
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 2013fc IN ESO 154-10 = PSN J02450896-5544273.
G. Pignata, Y. Apostolovski, E. Paillas, S. Varela, F. Bufano, F.
Olivares, and K. Takats, Universidad Andres Bello; M. Hamuy, R. Antezana, L.
Gonzalez, R. Cartier, F. Forster, S. Silva, F. Carrasco, and R. Ramirez,
Universidad de Chile; F. Aros, Pontificia Universidad Catolica de Chile; B.
Conuel, Wesleyan University; G. Folatelli, IPMU, University of Tokyo; and D.
E. Reichart, J. B. Haislip, J. P. Moore, and A. P. 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 15.4) on an unfiltered
image taken on Aug. 20.21 UT with the 0.41-m 'PROMPT 1' telescope located at
Cerro Tololo. The new object is located at R.A. = 2h45m08s.96 +/- 0".2, Decl.
= -55o44'27".3 +/- 0".2 (equinox 2000.0), which is about 1".9 east and 0".5
south of the center of the galaxy ESO 154-10. The variable was designated PSN
J02450896-5544273 when it was posted at the Central Bureau's TOCP webpage and
is here designated SN 2013fc based on the spectroscopic confirmation reported
below. Additional CCD magnitudes for 2013fc: July 2.34, [18.0 (CHASE);
Aug. 22.23, 15.4 (CHASE); 25.528, V = 15.90 and I_c = 14.75 (Seiichiro Kiyota,
Kamagaya, Japan; T30 iTelescope 0.5-m astrograph at Siding Spring; image
posted at URL http://meineko.sakura.ne.jp/ccd/PSN_J02450896-5544273.jpg);
25.626, 15.9 (Joseph Brimacombe, Cairns, Australia; 41-cm RCOS telescope +
infrared filter; position end figures 09s.00, 27".7; image posted at website
URL http://www.flickr.com/photos/43846774@N02/9595702910/).
C. Inserra, Queen's University of Belfast (QUB); E. Kankare, T. Kangas,
and S. Mattila, University of Turku; M. Fraser, QUB; R. Scalzo, Australian
National University; M. Nicholl, QUB; A. Gal-Yam and O. Yaron, Weizmann
Institute for Science; S. Benetti and A. Pastorello, Istituto Nazionale di
Astrofisica (INAF), Padova; S. Valenti, Las Cumbres Observatory Global
Telescope and University of California at Santa Barbara; S. Taubenberger,
Max-Planck-Institut fuer Astrophysik, Garching; S. J. Smartt, K. Smith, and D.
Young, QUB; M. Sullivan, University of Southampton; and C. Knapic, M.
Molinaro, and R. Smareglia, INAF, Trieste, on behalf of the PESSTO
collaboration (see website URL http://www.astronomerstelegram.org/?read=4037),
report that an optical spectrogram (range 360-910 nm) of PSN J02450896-5544273
= SN 2013fc, obtained on Aug. 29.41 UT at the 3.6-m New Technology Telescope (+
EFOSC2) at La Silla Observatory, shows it to be a type-IIn supernova. Adopting
a recession velocity of 5586 km/s for ESO 154-10 (Loveday et al. 1996, Ap.J.
Suppl. 107, 201; via NED), the best fits to the 2013fc spectrum found by GELATO
(Harutyunyan et al. 2008, A.Ap. 488,383; publicly available at website URL
https://gelato.tng.iac.es
NOTE: These 'Central Bureau Electronic Telegrams'
are sometimes superseded by text appearing later
in the printed IAU Circulars.
(C) Copyright 2013 CBAT 2013 September 01 (CBET 3644)
Daniel W. E. Green
Supernova 2013fc
Descubierta el 20/08/2013, Magnitud 15.4.
Encontrada en ESO ESO 154-10, R.A. = 2h45m08s.96, Decl.= -55º44'27".3 .
Localización 1".9 Este y 0".5 Sur del centro de ESO 154-10.
Tipo IIn. PGC 10415.
Electronic Telegram No. 3600
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 2013eg IN ESO 501-84.
M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier, F. Forster, S. Silva, F.
Carrasco, and R. Ramirez, Universidad de Chile; G. Pignata, Y. Apostolovski,
E. Paillas, and S. Varela, Universidad Andres Bello; F. Aros, Pontificia
Universidad Catolica de Chile; B. Conuel, Wesleyan University; G. Folatelli,
IPMU, University of Tokyo; and D. E. Reichart, J. B. Haislip, J. P. Moore, and
A. P. 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 17.5) on an unfiltered image taken on June 10.10 UT with the
0.41-m 'PROMPT 3' telescope located at Cerro Tololo. The new object is
located at R.A. = 10h43m28s.19 +/- 0".2, Decl. = -25°51'52".1 +/- 0".2
(equinox 2000.0), which is about 1".3 west and 8".6 north of the center of the
galaxy ESO 501-84. The variable was designated PSN J10432819-2551521 when it
was posted at the Central Bureau's TOCP webpage and is here designated SN
2013eg based on the spectroscopic confirmation reported below. Additional
CCD magnitudes for 2013eg: Apr. 11.09, [18.5 (CHASE); June 10.96, 17.2
(CHASE); 13.471, 17.7 (J. Brimacombe, Cairns, Australia; 41-cm telescope +
infrared filter; bandpass > 700 nm; position end figures 28s.19, 52".6; image
posted at website URL http://www.flickr.com/photos/43846774@N02/9045557269/);
15.482, 18.1 (Brimacombe; position end figures 28s.19, 53".1; image posted at
URL http://www.flickr.com/photos/43846774@N02/9320727496/).
K. Takats and G. Pignata, Universidad Andres Bello; and P. Lira, J.
Martinez, and J. Mejia, Universidad de Chile, on behalf of the Millennium
Center for Supernova Science, report optical spectroscopy (range 360-920 nm)
of PSN J10432819-2551521 = SN 2013eg, obtained on July 11.98 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 2013eg is a type-Ia supernova
about three weeks after maximum light.
NOTE: These 'Central Bureau Electronic Telegrams'
are sometimes superseded by text appearing later
in the printed IAU Circulars.
(C) Copyright 2013 CBAT 2013 July 25 (CBET 3600)
Daniel W. E. Green
Supernova 2013eg
Descubierta el 10/06/2013, Magnitud 17.5.
Encontrada en ESO 501-G84, R.A. = 10h43m28s.19, Decl. = -25°51'52".1 .
Localización 1".3 Oeste y 8".6 Norte del centro de ESO 501-G84.
Tipo Ia. PGC 31962.
Electronic Telegram No. 3566
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 2013dk IN NGC 4038.
[Editor's note: the text below replaces that on CBET 3565]
F. Carrasco, M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier, F. Forster,
S. Silva, and R. Ramirez, Universidad de Chile; G. Pignata, Y. Apostolovski,
E. Paillas, and S. Varela, Universidad Andres Bello; F. Aros, Pontificia
Universidad Catolica de Chile; B. Conuel, Wesleyan University; G. Folatelli,
IPMU, University of Tokyo; and D. E. Reichart, J. B. Haislip, J. P. Moore, and
A. P. 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 June 22.12 UT with the
0.41-m 'PROMPT 5' telescope located at Cerro Tololo. The new object is
located at R.A. = 12h01m52s.72 +/- 0".2, Decl. = -18o52'18".3 +/- 0".2
(equinox 2000.0). Nothing is visible at this position on archival images
taken on Apr. 16.29 (limiting mag 18.5). The variable was designated PSN
J12015272-1852183 when it was posted at the Central Bureau's TOCP webpage
and is here designated SN 2013dk based on the spectroscopic confirmation
reported below. SNe 1921A, 1974E (cf. IAUC 2653), 2004gt (cf. IAUC 8454,
8456), and 2007sr (cf. CBET 1172) also appeared in NGC 4038. Stuart Parker,
Oxford, Canterbury, New Zealand, writes that the object appeared at mag
around 15.5 on his exposures taken in poor seeing on June 24.330; his images
are posted at website URL http://www.bosssupernova.com/confirmingimages.htm.
A. Harutyunyan, Telescopio Nazionale Galileo (TNG); and S. Benetti, A.
Pastorello, E. Cappellaro, L. Tomasella, P. Ochner, and M. Turatto,
Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica, report
that an optical spectrogram (range 335-785 nm; resolution 1.5 nm) of 2013dk,
obtained on June 23.88 UT with the TNG Telescope (+ Dolores), shows that this
is a type-Ic supernova. A good match is found with the type-Ic supernova
1994I (Millard et al. 1999, Ap.J. 527, 746) at about six days before maximum
light. The spectrum is dominated by prominent lines of Ca II H and K and Fe
II in the blue part -- while in the redder wavelengths, weaker lines are
detected at about 566, 601.7, and 631 nm. If they are identified with He I
587.6-nm (possibly blended with Na I D 589.2-nm), Si II 635.5-nm, and C II
658-nm, respectively, expansion velocities of about 13000, 18000, and 14000
km/s are deduced, assuming a redshift of 0.005477 for the parent galaxy
(Lauberts and Valentijn 1989, The Surface Photometry Catalogue of the
ESO-Uppsala Galaxies, European Southern Observatory; via NED). The Asiago-
TNG classification spectra are posted at URL http://sngroup.oapd.inaf.it;
classification was made via GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383)
and SNID (Blondin and Tonry 2007, Ap.J. 666, 1024).
J. Vinko, University of Szeged and University of Texas at Austin; G. H.
Marion, J. M. Silverman, and J. C. Wheeler, University of Texas at Austin; T.
Szalai, University of Szeged; and R. Quimby, IPMU, University of Tokyo,
report that a low-resolution optical spectrogram (wavelength range 350-900 nm)
of PSN J12015272-1852183 = SN 2013dk was obtained with the Robert Stobie
Spectrograph mounted to the 10-m Southern African Large Telescope on June
23.78 UT. Inspection of the spectrum reveals that the transient is probably a
young type-Ic supernova at a few days before maximum light. The SuperNova
IDentification Tool (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows good
matches with pre-maximum spectra of the normal type-Ic supernova 1994I at a
redshift consistent with that of the host galaxy, NGC 4038. If the broad
absorption feature appearing near 600.0 nm is attributed to Si II 635.5-nm,
then its velocity is measured to be about 18700 km/s. The Ca II near-infrared
triplet has no apparent high-velocity component, and its Doppler shift is
consistent with that of the Si II feature.
NOTE: These 'Central Bureau Electronic Telegrams'
are sometimes superseded by text appearing later
in the printed IAU Circulars.
(C) Copyright 2013 CBAT 2013 June 26 (CBET 3566)
Daniel W. E. Green
Supernova 2013dk
Descubierta el 22/06/2013, Magnitud 15.8.
Encontrada en NGC 4038, R.A. = 12h01m52s.72, Decl. = -18°52'18".3 .
Localización 0".0 Oeste y 0".0 Norte del centro de NGC 4038.
Tipo Ic. PGC 37967.
Electronic Telegram No. 3517
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 2013cg IN NGC 2891.
G. Pignata, Y. Apostolovski, E. Paillas, and S. Varela, Universidad
Andres Bello; M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier, F. Forster, S.
Silva, F. Carrasco, P. Sanchez, and R. Ramirez, Universidad de Chile; F. Aros,
Pontificia Universidad Catolica de Chile; B. Conuel, Wesleyan University; G.
Folatelli, IPMU, University of Tokyo; and D. E. Reichart, J. B. Haislip, J. P.
Moore, and A. P. 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 13.3) on an unfiltered image taken on May 6.03 UT with the
0.41-m 'PROMPT 3' telescope located at Cerro Tololo. The new object is located
at R.A. = 9h26m56s.77 +/- 0".2, Decl. = -24°46'59".6 +/- 0".2 (equinox 2000.0),
which is about 1".7 east and 1".0 south of the center of the galaxy NGC 2891.
The variable is also barely visible in an image taken under poor weather
conditions on Apr. 22.99. The variable was designated PSN J09265677-2446596
when it was posted at the Central Bureau's TOCP webpage and is here designated
SN 2013cg based on the spectroscopic confirmation reported below. Additional
CCD magnitudes for 2013cg: Apr. 4.04, [18.5 (CHASE); May 8.519, V = 13.98 and
I_c = 13.92 (Seiichiro Kiyota, Tsukuba, Japan; iTelescope.net 0.50-m f/6.8
astrograph + FLI-PL6303E camera located at Siding Spring, NSW; measurements
very difficult, with the variable very close to the nucleus of NGC 2891; image
posted at URL http://meineko.sakura.ne.jp/ccd/PSN_J09265677-2446596.jpg).
K. Takaki, K. Kawaguchi, and K. S. Kawabata, Hiroshima University; and M.
Yamanaka, Kyoto University; report that they obtained low-resolution (R = 400)
optical spectra of PSN J09265677-2446596 = SN 2013cg on May 11.5 UT at the
Higashi-Hiroshima Observatory, Hiroshima University. After the recession
velocity of the host galaxy (NGC 2891) is corrected, the spectra show the
absorption feature of Si II at 610 nm; this line seems to have a relatively
flat-bottomed profile, and the line velocity reaches 12000 km/s. The
absorption line of S II around 540 nm is relatively broad and shallow. The
absorption line of Si II is seen at 572 nm. These profiles are similar to
that of a normal type-Ia supernova at around a week before maximum (Garavini
et al. 2007, A.Ap. 471, 527).
NOTE: These 'Central Bureau Electronic Telegrams'
are sometimes superseded by text appearing later
in the printed IAU Circulars.
(C) Copyright 2013 CBAT 2013 May 03 (CBET 3517)
Daniel W. E. Green
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 2013ay IN IC 4745.
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, Y. Apostolovski, E. Paillas, and S. Varela, Universidad Andres Bello;
F. Aros, Pontificia Universidad Catlica de Chile; B. Conuel, Wesleyan
University; G. Folatelli, IPMU, University of Tokyo; and D. E. Reichart, J. B.
Haislip, J. P. Moore, and A. P. 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 15.1) on an unfiltered image taken on
Mar. 26.29 UT with the 0.41-m 'PROMPT 1' telescope located at Cerro Tololo.
The new object is located at R.A. = 18h42m37s.86 +/- 0".2, Decl. =
-64o56'13".5 +/- 0".2 (equinox 2000.0), which is about 12".7 east and 21".3
north of the center of the galaxy IC 4745. The variable was designated PSN
J18423786-6456135 when it was posted at the Central Bureau's TOCP webpage and
is here designated SN 2013ay based on the spectroscopic confirmation reported
below. Additional CCD magnitudes for 2013ay: 2012 Sept. 29.08, [18.2
(CHASE; year assumed); 2013 Mar. 26.29, 15.2 (CHASE); 29.680, 16.4 (Joseph
Brimacombe, Cairns, Australia; 41-cm RCOS telescope + infrared filter;
bandpass > 700 nm; position end figures 37s.97, 13".4; image posted at URL
http://www.flickr.com/photos/43846774@N02/8600797843/); 30.802, 16.7
(Brimacombe; position end figures 37s.90, 13".4; image posted at website URL
http://www.flickr.com/photos/43846774@N02/8611320611/).
E. Y. Hsiao and N. Morrell, Las Campanas Observatory; and G. H. Marion,
Harvard-Smithsonian Center for Astrophysics report that a near-infrared
spectrogram (range 800-2400 nm) of PSN J18423786-6456135 = 2013ay was obtained
on Apr. 1.34 UT with the FoldedPort Infrared Echellette (FIRE) spectrograph on
the 6.5-m Magellan Baade Telescope. The spectrum shows that 2013ay is a
type-Ia supernova a few days past maximum light. The near-infrared spectrum
is similar to that of SN 2000dk at 5 days past maximum (Marion et al. 2009,
A.J. 138, 727). The supernova redshift approximately matches the redshift of
the presumed host galaxy (IC 4745) at z = 0.016.
NOTE: These 'Central Bureau Electronic Telegrams'
are sometimes superseded by text appearing later
in the printed IAU Circulars.
(C) Copyright 2013 CBAT 2013 April 09 (CBET 3456)
Daniel W. E. Green
Supernova 2013ay
Descubierta
el 26/03/2013, Magnitud 15.1.
Encontrada en IC 4745, R.A. = 18h42m37s.86, Decl. = -64°56'13".5 .
Localización 12".7 Este y 21".3 Norte del
centro de IC 4745.
Tipo Ia. PGC 62292.
Electronic Telegram No. 33437
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 2013ak IN ESO 430-20.
F. Carrasco, M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier, F. Forster,
S. Silva, P. Sanchez, C. Hervias, and R. Ramirez, Universidad de Chile; G.
Pignata, S. Varela, and Y. Apostolovski, Universidad Andres Bello; 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 13.5) on an unfiltered image taken
on Mar. 9.23 UT with the 0.41-m 'PROMPT 3' telescope located at Cerro Tololo.
CTIO. The new object is located at R.A. = 8h07m06s.69 +/- 0".2, Decl. =
-28°03'10".1 +/- 0".2 (equinox 2000.0), which is about 25".4 west and 1".8
south of center of the galaxy ESO 430-20. The variable was designated PSN
J08070669-2803101 when it was posted at the Central Bureau's TOCP webpage and
is here designated SN 2013ak based on the spectroscopic confirmation reported
below. Additional CCD magnitudes for 2013ak: Feb. 15.15, 18.5 (CHASE);
Mar. 11.129, 14.1 (Joseph Brimacombe, Cairns, Australia; remotely with a 51-cm
RCOS telescope + luminance filter loated at the New Mexico Skies observatory
near Mayhill, NM, U.S.A.; position end figures 06s.69, 10".2; image posted at
website URL http://www.flickr.com/photos/43846774@N02/8549210863/).
D. Milisavljevic, Harvard-Smithsonian Center for Astrophysics (CfA); R.
Fesen, Dartmouth College; T. Pickering and A. Kniazev, South African
Astronomical Observatory and Southern African Large Telescope; J. Parrent,
Dartmouth College and Las Cumbres Observatory; and Alicia Soderberg and
Raffaella Margutti, CfA, report that low-dispersion spectra (range 350-880 nm),
obtained on Mar. 10.9 UT with the 10-m SALT telescope (+ RSS), show PSN
J08070669-2803101 = SN 2013ak to be a young type-II supernova not long after
outburst. Fitting with the SYN++ software (Thomas et al. 2011, PASP 123, 237)
suggests that the broad P-Cyg features seen on a fairly blue continuum are
associated with H_alpha, Na I, Ca II, and He I. Using a redshift of z =
0.0037, as measured from narrow emission lines associated with a coincident
H II region in the host galaxy (ESO 430-20), they estimate the velocity of the
H_alpha absorption feature to be approximately -18500 km/s. The spectra
resemble those previously reported for the type-II supernova 2012dy (cf. CBET
3197) and the type-IIb supernova 2011hs (cf. CBET 2902), though in those
objects the Fe II absorptions between 400 and 520 nm were stronger.
NOTE: These 'Central Bureau Electronic Telegrams'
are sometimes superseded by text appearing later
in the printed IAU Circulars.
(C) Copyright 2013 CBAT 2013 March 12 (CBET 3437)
Daniel W. E. Green
Supernova 20132ak
Descubierta el 09/03/2013, Magnitud 13.5.
Encontrada en ESO 430-20, R.A. = 8h07m06s.69, Decl. = -28°03'10".1.
Localización 25".4 Oeste y 1".8 Sur del centro de ESO 430-20.
Tipo II. PGC 22788.