Discovery of SNF20061011-000, a Type Ib Supernova

ATel #918; The Nearby Supernova Factory: E. Pecontal, G. Rigaudier (Centre de Recherche Astronomique de Lyon), P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), C. Buton, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, S. Bailey, S. Bongard, M. J. Childress, S. Loken, P. Nugent, S. Perlmutter, K. Runge, R. Scalzo, R. C. Thomas, B. A. Weaver (Lawrence Berkeley National Laboratory, Berkeley, CA), R. Kessler (Kavli Institute for Cosmological Physics, Chicago, IL), C. Baltay, A. Bauer, D. Herrera, D. Rabinowitz (Yale), along with G. Djorgovski, A. Mahabal, and A. Soderberg (Caltech)
on 20 Oct 2006; 22:55 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Alicia M. Soderberg (ams@astro.caltech.edu)

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The Nearby Supernova Factory report the discovery of supernova SNF20061011-000 (coordinates RA 02:16:59.89 DEC +30:41:57.4 J2000.0) in an image obtained October 11.4 UTC at an approximate magnitude of 19.1 (calibrated to R) using the QUEST II camera on the Palomar Oschin 48-inch telescope as a part of the JPL Near-Earth Asteroid Tracking component of the Palomar-QUEST Consortium. A spectrum (range 320-1000 nm) of this object was obtained October 13.6 UTC with the Supernova Integral Field Spectrograph on the University of Hawaii 2.2-meter telescope. An inspection of the spectrum by Djorgovski & Mahabal that it is a late Type Ib supernova similar to SN 1985F (Filippenko & Sargent 1986, AJ, 91, 691). The spectrum of SNF20061011-000 exhibits similar strong forbidden emission features like the late-time spectrum of SN 1985F, including [O I] 630.0,636.4 nm, [Ca II] 729.2,732.4 nm, O I 777.0 nm, and a blend of other emission features around 870 nm. The supernova is positioned about 12 arcsec from an anonymous low surface brightness galaxy. An approximate redshift of z = 0.015 is measured from the [O I] emission feature.