[IAUC] CBET 1031: 20070810 : SUPERNOVA 2007gp

Vie Ago 10 21:10:22 ART 2007

                                                  Electronic Telegram No. 1031
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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CBAT en CFA.HARVARD.EDU (science)
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SUPERNOVA 2007gp
     Further to CBET 1026, the "Nearby Supernova Factory" collaboration (P.
Antilogus, R. Pain, R. Pereira, and C. Wu, Laboratoire de Physique Nucleaire
et de Haute Energies de Paris; 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; 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; D. Birchall,
Institute for Astronomy, University of Hawaii, Hilo; and J. Holtzman, New
Mexico State University, Las Cruces) reports the discovery of a supernova
(at R approximately 20.5) in images obtained on Aug. 7.2 UT using the QUEST-II
camera on the Palomar Oschin 1.2-m Schmidt telescope, operated by the
Palomar-QUEST consortium.  SN 2007gp is located at R.A. = 21h57m35s.59, Decl.
= +8o00'47".3 (equinox 2000.0).  A noisy spectrogram (range 320-1000 nm),
obtained on Aug. 8.5 with the SuperNova Integral Field Spectrograph on the
University of Hawaii 2.2-m telescope, suggests -- from a spectral fit using
a library of other supernova spectra -- that 2007gp is a type-Ia supernova
at a redshift of z approximately 0.24 and that the supernova may be
approaching or around maximum brightness.


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                         (C) Copyright 2007 CBAT
2007 August 10                   (CBET 1031)              Daniel W. E. Green