[IAUC] CBET 2642: 20110127 : SUPERNOVA 2010lw

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 2642
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 2010lw
     R. Amanullah, A. Goobar, J. Johansson, J. Joensson, E. Moertsell, J.
Nordin, K. Paech, T. Riehm, and V. Stanishev, Physics Department, Stockholm
University, report the discovery of a type-Ia supernova (at AB magnitude i =
20.3) that was first detected on 2010 May 17.944 UT with the 2.5-m Nordic
Optical Telescope (NOT) on the island of La Palma.  The new object, designated
SN 2010lw, is located 0".77 west and 0".35 north of its presumed host galaxy,
which is one of the members of the galaxy cluster Abell 1689 and is located
at R.A. = 13h11m21s.618, Decl. = -1d21'41".57 (equinox 2000.0); thus, 2010lw
is located at position end figures 21s.567, 41".22.  Additional AB magnitudes
for 2010lw:  2010 Apr. 10, [24.3 (i-band; 5-sigma; NOT/MOSCA); May 20, g =
20.9, r = 20.4, i = 20.5; June 12, g = 22.8, r = 21.5, i = 21.2; July 11,
A spectrogram (range 400-770 nm) was obtained on 2010 May 21 by Joel Johansson
using the NOT (+ ALFOSC), showing clear type-Ia-supernova features (Ca H and K,
Fe, S, and Si II 635.5-nm).  The spectrum matches a type-Ia-supernova template
at day 12 for z = 0.189 (the redshift of the host galaxy).  The template epoch
(day 12) is consistent with the lightcurve dating.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2011 CBAT
2011 January 27                  (CBET 2642)              Daniel W. E. Green