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PTF discovery of PTF10ksq, a type II supernova

ATel #2723; S. Ben-Ami, S. Lazarevic, O. Yaron, Y. Green, A. Gal-Yam, I. Arcavi (Weizmann Institute of Science), E. O. Ofek, R. M. Quimby, M. M. Kasliwal, S. R. Kulkarni (Caltech), P. Nugent (LBNL), J. S. 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 6 Jul 2010; 06:15 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, PTF10ksq. The supernova was discovered on June 14 UT at RA(J2000) = 23:45:50.60 and DEC(J2000) = -06:46:53.1 at a magnitude of 19.6 in R-band (calibrated with respect to the USNO catalog) in the galaxy MCG -01-60-028 (z=0.035). The supernova was not detected down to mag 21.5 in previous PTF images taken during 2009 (3-sigma). A spectrum was obtained using the Low Resolution Imaging Spectrometer (LRIS; Oke et al. 1995, PASP, 107, 375) on the Keck-1 10-m telescope on June 17 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 II-P SN 1999em at 15 days post-peak.