[IAUC] CBET 2701: 20110418 : SUPERNOVA 2011bq IN IC 1288 = PSN J18292236+3942345

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 2701
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 2011bq IN IC 1288 = PSN J18292236+3942345
     Further to CBET 2699, P. Blanchard, 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
 2011bq   Apr. 15.52   18 29 22.36  +39 42 34.5   17.9    1".0 W, 14".0 S

This variable was designated PSN J18292236+3942345 when posted on the Central
Bureau's TOCP webpage and is here designated SN 2011bq based on the
spectroscopic report below.  Additional CCD magnitudes for 2011bq:  2010 Oct.
15.14 UT, [19.1 (KAIT); 2011 Apr. 16.391, 17.8 (Joseph Brimacombe, Cairns,
Australia; remotely using a 51-cm RCOS telescope + STL11K camera + red
filter at New Mexico Skies Observatory, Mayhill, NM, U.S.A.; position end
figures 22s.44, 34".8).  Brimacombe's image is posted at the following
website URL:  http://www.flickr.com/photos/43846774@N02/5624024607/.

     J. M. Silverman and A. V. Filippenko, University of California, Berkeley,
report that inspection of a CCD spectrum (range 340-1000 nm), obtained by A.
Sonnenfeld and D. Sand (University of California, Santa Barbara) on Apr. 16 UT
with the 3-m Shane reflector (+ Kast) at Lick Observatory, shows that PSN
J18292236+3942345 = SN 2011bq is a type-II supernova with well-developed
Balmer lines having P-Cyg profiles; after removal of the host-galaxy recession
velocity of 5800 km/s, determined from narrow emission features, the
absorption minimum of the H-alpha line is found to be blueshifted by about
6300 km/s.  Cross-correlation with a library of supernova spectra using the
"SuperNova IDentification" code (SNID; Blondin and Tonry 2007, Ap.J. 666,
1024) indicates that 2011bq is a type-IIP supernova at 2 to 3 months past
maximum brightness.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2011 CBAT
2011 April 18                    (CBET 2701)              Daniel W. E. Green