Electronic Telegram No. 3664
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@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2013fp IN IC 421 = PSN J05320725-0754238
     Further to CBET 3606, W. Zheng, W. Li, and A. V. Filippenko, University
of California at Berkeley; and S. B. Cenko, Goddard Space Flight Center,
report the LOSS discovery of a possible supernova in IC 421 on unfiltered KAIT
images:

 SN       2013 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2013fp   Sep. 19.49   5 32 07.25  - 7 54 23.8   19.4    18".9 W, 41".8 N

A finding chart for the new object has been posted at the following website
URL:  http://astro.berkeley.edu/~zwk/findingchart/PSN_J05320725-07542376.jpg.
The variable was designated PSN J05320725-0754238 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2013fp based on the
spectroscopic confirmation reported below.  Additional approximate CCD
magnitudes for 2013fp:  Sept. 4.4 UT, [19.3 (KAIT); 20.4, 19.1 (KAIT); 23.5,
19.4 (KAIT); 23.740, 18.5 (Joseph Brimacombe, Cairns, Australia; 41-cm RCOS
telescope + STL6K camera + infrared filter; bandpass > 700 nm; image posted
at website URL http://www.flickr.com/photos/43846774@N02/9909942306/).

     D. Milisavljevic, Harvard-Smithsonian Center for Astrophysics, reports
that a low-dispersion spectrogram (range 425-940 nm), obtained on Sept. 29.3
UT with the 6.5-m Magellan-Baade telescope (+ IMACS), shows PSN
J05320725-0754238 = SN 2013fp to be a type-II supernova.  Cross-correlation
with a library of supernova spectra using the "Supernova Identification" code
(SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows many reasonable matches
with normal type-IIP events at approximately 1-3 months after maximum light.
Comparison with spectra retrieved from the Supernova Spectrum Archive
(SUSPECT; cf. website URL http://www.nhn.ou.edu/~suspect/) shows a
particularly good match with the subluminous type-IIP supernova 2005cs at 34
days post-maximum (Pastorello et al. 2006, MNRAS 370, 1752).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 October 2                   (CBET 3664)              Daniel W. E. Green