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PTF discovery of PTF10htz, a type II supernova

ATel #2685; I. Arcavi, A. Sternberg, O. Yaron, Y. Green, A. Gal-Yam (Weizmann Institute of Science), R. M. Quimby, M. M. Kasliwal, E. O. Ofek, S. R. Kulkarni (Caltech), P. Nugent (LBNL), J. Bloom (UCB), N. M. Law (U. Toronto), R. G. Dekany, G. Rahmer, David Hale, R. Smith, J. Zolkower, V. Velur, R. Walters, J. Henning, K. Bui, D. McKenna (Caltech), and J. Jacobsen (LBNL) on behalf of the Core-Collapse working group of the Palomar Transient Factory (ATEL#1964)
on 19 Jun 2010; 10:52 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Avishay Gal-Yam (avishay.gal-yam@weizmann.ac.il)

Subjects: Optical, Supernovae

The PTF (ATEL #1964; http://www.astro.caltech.edu/ptf/ ) reports the discovery of a new supernova, PTF10htz. The supernova was discovered on April 03 UT at RA(J2000) = 13:08:37.52 and DEC(J2000) = +79:47:13.2 at a magnitude of 20.5 in R-band (calibrated with respect to the USNO catalog) in the galaxy CGCG 352-058 (z=0.035). The supernova was not detected down to mag 21 in previous PTF images taken during 2009 (3-sigma). A spectrum was obtained using the Double-Beam Spectrograph (DBSP; Oke & Gunn 1982, PASP, 94, 586) on the Palomar 5-m Hale telescope on June 13 UT, revealing the supernova to be of type II. The superfit program (Howell et al. 2005, ApJ 634, 1190) finds a good match to the type IIb SN 1993J at 23 days post-peak.