[IAUC] CBET 2674: 20110311 : SUPERNOVA 2011as IN UGC 3098 = PSN J04370666+4355353

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                                                  Electronic Telegram No. 2674
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 2011as IN UGC 3098 = PSN J04370666+4355353
     Further to CBET 2640, A. Narla, S. B. Cenko, W. Li, and A. V. Filippenko
report the LOSS discovery of an apparent supernova on unfiltered KAIT images:

 SN       2011 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2011as   Jan. 24.30   4 37 06.66  +43 55 35.3   19.1    6".5 E, 0".5 N

This object was designated PSN J04370666+4355353 when posted on the Central
Bureau's TOCP webpage and is here designated SN 2011as based on the
spectroscopic report below.  Additional unfiltered CCD magnitudes for 2011as
in UGC 3098:  a co-added frame from images taken prior to 2011 Jan. 25,
[20.3 (KAIT); 2011 Jan. 25.20 UT, 19.3 (KAIT); Feb. 6.070, 17.4 (X. Bros,
Sabadell, Spain, 35-cm telescope; position end figures 06s.55, 35".5);
Mar. 6.808, 17.8 (Bros; position end figures 06s.12, 35".3).

     J. M. Silverman, S. B. Cenko, and A. V. Filippenko, University of
California, Berkeley, report that inspection of a CCD spectrum (range 330-1000
nm), obtained on Mar. 9 UT with the 10-m Keck I telescope (+ LRIS), shows that
PSN J04370666+4355353 = 2011as is a type-II supernova with well-developed P-Cyg
line profiles.  The spectrum is consistent with an age of about 1.5 months,
derived from the discovery and prediscovery images.  After removal of the
host-galaxy recession velocity of 3870 km/s (measured from narrow host-galaxy
emission lines), they find the absorption minimum of the H-alpha line to be
blueshifted by about 7600 km/s.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2011 CBAT
2011 March 11                    (CBET 2674)              Daniel W. E. Green