[IAUC] CBET 2671: 20110311 : SUPERNOVA 2011aq IN NGC 1056 = PSN J02424814+2834258

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 2671
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 2011aq IN NGC 1056 = PSN J02424814+2834258
     Further to CBET 2640, 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
 2011aq   Jan. 24.20   2 42 48.14  +28 34 25.8   18.0    2".9 W, 0".9 S

Additional KAIT magnitudes for 2011aq:  Jan. 17.20 UT, [19.3; Feb. 3.15, 17.3.
This object was designated PSN J02424814+2834258 on the Central Bureau's
TOCP webpage and is here designated SN 2011aq based on the spectroscopic
report below.

     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 J02424814+2834258 = 2011aq 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 1550 km/s (measured from narrow host-
galaxy emission lines), they find the absorption minimum of the H-alpha line
to be blueshifted by about 5300 km/s.


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                         (C) Copyright 2011 CBAT
2011 March 11                    (CBET 2671)              Daniel W. E. Green