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A Supernova Discovery

ATEL # 1177; The Nearby Supernova Factory: 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), G. Rigaudier, E. Pecontal (Centre de Recherche Astronomique de Lyon), C. Buton, Y. Copin, E. Gangler, G. Smadja, C. Tao (Institut de Physique Nucleaire de Lyon); and D. Birchall (Institute for Astronomy, University of Hawaii, Hilo, HI); and J. Holtzman (New Mexico State University, Las Cruces, NM)
on 10 Aug 2007; 23:31 UT
Distributed as an Instant Email Notice (Supernova)
Password Certification: R. C. Thomas (

Subjects: Infra-Red, Optical, Ultra-Violet, Nova, Supernova

The Nearby Supernova Factory reports the discovery of supernova SNF20070807-000 in images obtained Aug 07.2 UTC using the QUEST-II camera on the Palomar Oschin 48-inch telescope, operated by the Palomar-QUEST consortium at an approximate R-band magnitude of 20.5. J2000.0 coordinates RA 21:57:35.59 DEC 08:00:47.3 are derived from comparison with the USNO-B1.0 catalog. A noisy spectrum (range 320-1000 nm) obtained Aug 08.5 UTC with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2-meter telescope was used for classification. A fit to the spectrum from a library of other supernova spectra suggests that it is of Type Ia at an approximate redshift of z = 0.24, and that the supernova may be approaching or around maximum brightness.

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R. E. Rutledge , Editor
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