Electronic Telegram No. 1026
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 2007gn
     Further to CBET 1024, the "Nearby Supernova Factory" collaboration
(G. Aldering, C. Aragon, S. Bailey, S. Bongard, M. Childress, S. Loken, P.
Nugent, S. Perlmutter, K. Runge, R. C. Thomas, and B. A. Weaver, Lawrence
Berkeley National Laboratory, Berkeley; C. Baltay, A. Bauer, D. Rabinowitz,
and R. Scalzo, Yale University; G. Rigaudier and E. Pecontal, Centre de
Recherche Astronomique de Lyon; C. Buton, Y. Copin, E. Gangler, G. Smadja,
and C. Tao, Institut de Physique Nucleaire de Lyon; P. Antilogus, R. Pain,
R. Pereira, and C. Wu, Laboratoire de Physique Nucleaire et de Haute
Energies de Paris; D. Birchall, Institute for Astronomy, University of
Hawaii, Hilo; and J. Holtzman, New Mexico State University, Las Cruces)
reports the discovery of a supernova (R = 18.3) in images obtained on July
31.5 UT using the QUEST-II camera on the Palomar Oschin 1.2-m Schmidt
telescope, operated by the Palomar-QUEST consortium.  SN 2007gn is located
at R.A. = 3h16m31s.37, Decl. = +15o27'40".7 (equinox 2000.0).  A spectrum
(range 320-1000 nm), obtained on Aug. 8.6 with the SuperNova Integral
Field Spectrograph on the University of Hawaii 2.2-m telescope, shows that
the new object is a type-Ia supernova, three weeks after maximum, at an
approximate redshift of z = 0.036.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2007 CBAT
2007 August 8                    (CBET 1026)              Daniel W. E. Green