[IAUC] CBET 2672: 20110311 : SUPERNOVA 2011X1 IN UGC 2509 = PSN J03032521+0429399
quai en eps.harvard.edu
quai en eps.harvard.edu
Mie Sep 14 16:19:02 ART 2011
Electronic Telegram No. 2672
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 2011X1 IN UGC 2509 = PSN J03032521+0429399
Further to CBET 2671, M. Kandrashoff, 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
2011X1 Jan. 27.20 3 03 25.21 + 4 29 39.9 19.0 15".1 E, 8".9 N
The variable was designated PSN J03032521+0429399 when posted on the Central
Bureau's TOCP webpage and is designated SN 2011X1 here based on the
spectroscopic report below. Additional KAIT magnitudes for 2011X1 in UGC
2509: a co-added frame from Dec. 2010 to Jan. 2011, [20.3; 2011 Jan. 28.19
UT, 19.2.
J. M. Silverman, S. B. Cenko, and A. V. Filippenko, University of
California, Berkeley, report that inspection of a relatively noisy CCD
spectrum (range 330-1000 nm), obtained on Mar. 9 UT with the 10-m Keck I
telescope (+ LRIS), shows that PSN J03032521+0429399 = 2011X1 is a type-II
supernova. After removal of the host-galaxy recession velocity of 5860 km/s
(measured from narrow host-galaxy emission lines), they find the absorption
minimum of the H-alpha line to be blueshifted by about 7150 km/s.
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2011 CBAT
2011 March 11 (CBET 2672) Daniel W. E. Green
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