[IAUC] CBET 3025: 20120220 : SUPERNOVA 2012ae = PSN J08585588+2303424

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 3025
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 2012ae = PSN J08585588+2303424
     T. Kryachko, S. Korotkiy, and B. Satovskiy, Astrotel Observatory, Kazan
State University, report the discovery of an apparent supernova (mag
approximately 18.4) on five unfiltered images (limiting mag 21.0) obtained on
Feb. 13.76 UT with a Takahashi FRC-300 telescope (+ CCD Apogee Alta U9000
camera) at Karachay-Cherkessia, Russia.  The new object is located at R.A. =
8h58m55s.88 +/- 0".1, Decl. = +23d03'42".4 +/- 0".1 (equinox 2000.0), which
is about 3".2 west and 1".3 north of the center of the galaxy SDSS
J085856.01+230341.0.  Nothing is visible at this position on a Palomar Sky
Survey red plate from 1993 Mar. 22 (via the Digitized Sky Survey; limiting
mag 21.0) or on a Sloan Digital Sky Survey image (date, bandpass, limiting
magnitude not specified).  The variable was designated PSN J08585588+2303424
when it was posted at the Central Bureau's TOCP webpage and is here designated
SN 2012ae based on the spectroscopic confirmation reported below.  Paolo
Corelli, Pagnacco, Italy, writes that four co-added unfiltered CCD frames
(limiting mag 19.8) taken with a 0.45-m f/4.5 telescope around Feb. 17.916
show 2012ae at mag 18.5 and position end figures 55s.91, 42"; on the red
Palomar Sky Survey plate with limiting mag 21.5, a galaxy of mag 19.5 is
visible at this position.

     L. Tomasella, S. Valenti, A. Pastorello, and S. Benetti, Istituto
Nazionale di Astrofisica, Osservatorio Astronomico di Padova, report that a
spectrogram of PSN J08585588+2303424 = SN 2012ae, obtained on Feb. 18.89 UT
with the 1.82-m Copernico Telescope (+ AFOSC; range 340-790 nm, resolution
2.2 nm), indicates that it is a type-Ia supernova.  Cross-correlation with a
library of supernova spectra via the "Supernova Identification" code (SNID;
Blondin and Tonry 2007, Ap.J. 666, 1024) shows that it is similar to several
type-Ia supernovae around maximum.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 February 20                 (CBET 3025)              Daniel W. E. Green