Electronic Telegram No. 1328

Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVA 2008bq IN ESO 308-G25
    P. Luckas, Perth, W. Australia; O. Trondal, Oslo, Norway; and M. Schwartz,
Patagonia, AZ, U.S.A., report the discovery of an apparent supernova (mag 17.0)
on unfiltered CCD frames taken with the 0.35-m telescope at Perth on Apr. 2.47
and 5.54 UT in the course of the Tenagra Observatory Supernova Search.  The new
object is located at R.A. = 6h41m02s.51, Decl. = -38o02'19".0 (equinox 2000.0),
which is 4".6 west and 10".1 south of the center of ESO 308-G25 (which itself
has position end figures 02s.90, 08".9).  Nothing was visible at the position
of 2008bq on an image taken by Luckas on Mar. 17.55 (limiting magnitude about
18.0) or on a Digitized Sky Survey image from 1994 Nov. 11 (limiting red mag
21.0).


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      superseded by text appearing later in the printed IAU Circulars.

                        (C) Copyright 2008 CBAT
2008 April 5                    (CBET 1328)              Daniel W. E. Green




                   Electronic Telegram No. 1329

SUPERNOVAE 2008bm, 2008bp, AND 2008bq

     M. Stritzinger and N. Morrell, on behalf of the Carnegie Supernova
Project (CSP), report that they have obtained spectra (range 380-920 nm) of
2008bm (cf. CBET 1320), 2008bp (cf. CBET 1326), and 2008bq (cf. CBET 1328)
with the Las Campanas Observatory DuPont Telescope (+ WFCCD) on Apr. 7.1-7.3
UT.  Supernova 2008bm appears to be a type-IIn supernova, a couple of months
past explosion.  The spectrum of 2008bm is nearly identical to a spectrum of
the type-IIn supernova 2005kj taken by the CSP on 2006 Feb. 13.1.
     SN 2008bp appears to be a highly reddened young type-II-plateau supernova.
The spectrum consists of a red continuum with strong H-alpha emission and a
relatively weak H-beta absorption.  Using the "Supernova Identification" code
(SNID; Blondin and Tonry 2007, Ap.J. 666, 1024), they find 2008bp to be
similar to supernova 2004et around two weeks past explosion.  Adopting a
host-galaxy recession velocity of 2723 km/s (de Vaucouleurs et al., Third
Reference Catalogue of Bright Galaxies, Version 3.9) for the host galaxy, NGC
3095, H-beta is measured to be blue-shifted by roughly 9000 km/s.

     The spectrum of 2008bq indicates that it is a type-Ia supernova near
maximum light.  With the aid of SNID, they find 2008bq to be similar to
supernova 2003du at one day before maximum light.  Adopting a host-galaxy
recession velocity of 10193 km/s (derived from emission lines in a spectrum
of the host galaxy), the Si II absorption feature yields an expansion
velocity of roughly 11000 km/s.


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

                         (C) Copyright 2008 CBAT
2008 April 8                     (CBET 1329)              Daniel W. E. Green