| SUPERNOVA
2010ja IN NGC 2513
G. Pignata, and M. Cifuentes, Universidad Andres Bello;
J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier,
and F. Forster, Universidad de Chile; 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
17.9) on an unfiltered image taken on Oct. 15.35 UT
with the 0.41-m 'PROMPT 1' telescope located at Cerro
Tololo. The new object is located at R.A. = 8h02m28s.39
+/- 0".2, Decl. = +9°23'40".9 +/- 0".2 (equinox 2000.0),
which is about 55" east and 68" south of the center
of the galaxy NGC 2513; nothing is visible at this position
on stacked archival images taken between Jan. 8.13 and
Mar. 19.04 (limiting mag 19.5), but 2010ja is visible
at mag approximately 18.0 on images taken on Oct. 16.34
and 17.33.
N. Morrell, Las Campanas Observatory; and G. Folatelli,
IPMU, University of Tokyo, reports on spectroscopic
observations (range 330-950 nm) of 2010ja, obtained
on Oct. 22.4 UT with the Boller and Chivens spectrograph
attached to the 2.5-m du Pont telescope at Las Campanas
Observatory. The low-signal-noise spectrum of 2010ja
is that of an evolved type-Ia supernova; cross-correlation
with a library of supernova using SNID (Blondin and
Tonry 2007, Ap.J. 666, 1024) shows 2010? to be most
similar to SN 1991bg at about three months after maximum
light.
NOTE: These 'Central Bureau Electronic Telegrams' are
sometimes superseded by text appearing later in the
printed IAU Circulars.
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