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Classification of SN 2007ge and a Supernova Discovery

ATel #1166; The Nearby Supernova Factory: G. Rigaudier, E. Pecontal (Centre de Recherche Astronomique de Lyon), C. Buton, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon); P. Antilogus, R. Pain, R. Pereira, 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, B. A. Weaver (Lawrence Berkeley National Laboratory, Berkeley, CA), C. Baltay, A. Bauer, D. Rabinowitz, R. Scalzo (Yale University, New Haven, CT); and D. Birchall (Institute for Astronomy, University of Hawaii, Hilo, HI); and J. Holtzman (New Mexico State University, Las Cruces, NM)
on 1 Aug 2007; 21:12 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: R. C. Thomas (rcthomas@lbl.gov)

Subjects: Infra-Red, Optical, Ultra-Violet, Supernovae

The Nearby Supernova Factory reports the discovery of the Type II supernova SNF20070729-001 (J2000.0 coordinates RA 02:10:31.08, Decl. 02:19:59.3), at a magnitude of 19.1 in R-band derived from comparison with the USNO-B1.0 catalog, in images obtained Jul 29 UTC using the QUEST-II camera on the Palomar Oschin 48-inch telescope, operated by the Palomar-QUEST Consortium. A spectrum (range 320-1000 nm) obtained Aug 01.6 UTC with the SuperNova Integral Field Spectrograph (SNIFS) on the University of Hawaii 2.2-meter telescope was used for classification. The supernova appears to be a few months old, with strong hydrogen Balmer emission features. An approximate redshift of z = 0.02 is derived by measuring the peak of the observed H-alpha feature.

Also, the Nearby Supernova Factory reports that a SNIFS spectrum of SN 2007ge (CBET 1012), obtained Aug 01.5 UTC indicates that it is of Type Ia, a few days past maximum.