Central Bureau for Astronomical Telegrams
IAUC 8169: 2003gr; 2002lh; 2003gj
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Circular No. 8169
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVA 2003gr IN MCG -04-55-14
Further to IAUC 8168, M. Ganeshalingam and W. Li report the
LOTOSS discovery of an apparent supernova on unfiltered KAIT images
taken on July 27.5 (mag about 16.3) and 28.5 UT (mag about 16.4).
SN 2003gr is located at R.A. = 23h38m12s.67, Decl. = -20o46'56".0
(equinox 2000.0), which is 5".9 west and 0".8 north of the nucleus
of MCG -04-55-14. A KAIT image taken on 2002 Oct. 29.2 showed
nothing at this position (limiting mag about 19.0).
SUPERNOVA 2002lh
A. Gal-Yam and D. Maoz, Tel Aviv University; F. Prada, Isaac
Newton Group of Telescopes, IAC; and P. Guhathakurta, University of
California, Santa Cruz, report the discovery of a supernova (V
about 21) on unfiltered images taken by Maoz on 2002 June 9 with
the 2.5-m Nordic Optical Telescope (+ ALFOSC) at La Palma. SN
2002lh was located at R.A. = 14h44m20s.38, Decl. = +31o15'44".4
(equinox 2000.0), in the field of the galaxy cluster Abell 1961 (z
= 0.232). SN 2002lh was invisible on images obtained in April 2002
(limiting mag V about 24.0). A. V. Filippenko and R. Chornock,
University of California, Berkeley; and G. Smith, University of
California, Santa Cruz, report that inspection of a CCD spectrum
(range 550-930 nm), obtained by Smith on 2002 June 16 with the
Keck-I telescope (+ LRIS spectrograph), reveals the object to be a
type-Ia supernova, then near maximum brightness. The redshift
(measured from narrow nebular lines from the host galaxy) is 0.236,
consistent with that of the cluster Abell 1961.
SUPERNOVA 2003gj IN NGC 7017
R. J. Foley, L. Desroches, M. Ganeshalingam, W. Li, R.
Chornock, and A. V. Filippenko, University of California, Berkeley,
report that inspection of CCD spectra (range 320-1000 nm) obtained
on July 7 UT with the Shane 3-m telescope at Lick Observatory
reveals that SN 2003gj (IAUC 8161) is probably of type Ia, about 1
week past maximum brightness. However, its spectrum appears to be
somewhat peculiar for this epoch, being dominated by strong
emission lines near rest wavelengths of 550 nm and 645 nm, and a
weaker one near 585 nm. Features blueward of 530 nm are very weak,
as is the normally prominent O I 777.4-nm absorption. The spectrum
is similar to that of the somewhat subluminous (unfiltered absolute
magnitude at maximum approximately -18 to -18.5) type-Ia supernovae
2003M and 2003ek at comparable epochs.
(C) Copyright 2003 CBAT
2003 July 28 (8169) Daniel W. E. Green
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