[IAUC] CBET 2984: 20120120 : SUPERNOVA 2012H IN IC 411 = PSN J05201494-2518563

Vie Ene 20 14:51:12 ART 2012

                                                  Electronic Telegram No. 2984
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau en eps.harvard.edu (alternate cbat en iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2012H IN IC 411 = PSN J05201494-2518563
     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 16.7) on an unfiltered image taken on Jan. 10.16
UT with the 0.41-m 'PROMPT 3' telescope located at Cerro Tololo.  The new
object is located at R.A. = 5h20m14s.94 +/- 0".2, Decl. = -25o18'56".4 +/-
0".2 (equinox 2000.0), which is about 49".7 west and 31".6 north of the
center of the galaxy IC 411.  The variable was designated PSN
J05201494-2518563 when it was posted at the Central Bureau's TOCP webpage
(because Pignata gave a slightly different position when posting there) and
is here designated SN 2012H based on the spectroscopic confirmation reported
below.  Additional CCD magnitudes for 2012H (unfiltered unless noted
otherwise):  2011 Jan. 6.12-Oct. 11.30, [19.5 (stacked CHASE images); Nov.
3.13, [18.0 (CHASE); 2012 Jan. 11.08, 16.5 (CHASE); 14.232, 16.7 (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 14s.93, 56".6; image posted at website URL
http://www.flickr.com/photos/43846774@N02/6697768647/); 14.264, 17.1 (L.
Elenin, Lyubertsy, Russia; three stacked 300-s images remotely taken at the
ISON-NM Observatory near Mayhill with a 0.45-m f/2.8 telescope + KAF09000
CCD; limiting mag about 20.1; position end figures 14s.94, 56".1, uncertainty
given as +/- 0".1; UCAC3 reference stars; image posted at website URL
http://spaceobs.org/images/TOCP/PSNJ05201494-2518563-20120114.png).

     M. R. Drout, D. Milisavljevic, E. Berger, N. Sanders, and A. M. Soderberg,
Harvard University, report on low-dispersion spectra (range 330-850 nm) taken
on Jan. 19 UT with the 6.5-m MMT (+ Blue Channel).  PSN J05201494-2518563 = SN
2012H is a type-Ia supernova near maximum light.  Comparison with a library of
supernova spectra using the "Supernova Identification" tool (SNID; Blondin and
Tonry 2007, Ap.J., 666, 1024) provides a good match with supernova 1994D at
three days after maximum.  Using the host galaxy (IC 411) redshift of z =
0.03185 (da Costa et al. 1991, Ap.J. Suppl. 75, 935), the velocity of the
Si II 635.5-nm feature is estimated to be approximately 11000 km/s.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 January 20                  (CBET 2984)              Daniel W. E. Green