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La Silla-QUEST Detections and Nearby Supernova Factory II Spectroscopic Confirmations: Type Ic Supernova (LSQ11jw) and Type Ia Supernova (LSQ11pn)

ATel #3838; E. Hadjiyska, D. Rabinowitz, C. Baltay, N. Ellman, R. McKinnon (Yale); P. Antilogus, S. Bongard, A. Canto, F. Cellier-Holzem, J. Guy, R. Pain (LPNHE); Y. Copin, E. Gangler, R. Pereira, M. Rigault, G. Smadja (IPNL); G. Aldering, D. Birchall, M. Childress, H. Fakhouri, J. Nordin, P. Nugent, S. Perlmutter, K. Runge, C. Saunders, N. Suzuki, R. C. Thomas, (LBNL); E. Pecontal (CRAL); C. Buton, U. Feindt, M. Kerschhaggl, M. Kowalski, K. Paech (U. Bonn); S. Benitez, M. Fink, W. Hillebrandt, M. Kromer, S. Taubenberger (MPA); C. Tao (CPPM & THCA), D. Baugh, J. Chen, N. Chotard, C. Wu (THCA), D. Fouchez, A. Tilquin (CPPM)
on 30 Dec 2011; 20:04 UT
Credential Certification: Ellie Hadjiyska (ellie.hadjiyska@yale.edu)

Subjects: Optical, Supernovae

We report the discovery of the Type Ic supernova LSQ11jw (J2000.0 coordinates RA 02:04:47.40 DEC 00:50:06.0) on Dec. 18.6 UTC at magnitude R=20.9 (calibrated to USNO-B1.0), as part of the La Silla-QUEST (LSQ) transient survey conducted with Yale University's 160-megapixel QUEST camera on the European Southern Observatory 1.0-m Schmidt Telescope at La Silla, Chile (Rabinowitz et al. 2011, ApJ, 732, 512). A spectrum (320 to 1000 nm) of LSQ11jw was obtained Dec. 26.3 UTC with the SuperNova Integral Field Spectrograph (SNIFS) on the University of Hawaii 2.2-meter telescope on Mauna Kea, operated by the Nearby Supernova Factory II. Analysis of the spectrum using SNID (Blondin & Tonry 2007, ApJ, 666, 1024), indicates that LSQ11jw is a Type Ic supernova near or just past maximum brightness at an approximate redshift of z = 0.020. We also report the discovery of the Type Ia supernova LSQ11pn (J2000.0 coordinates RA 05:16:41.54 DEC 06:29:29.4) in an anonymous galaxy in Abell 539 (z = 0.03268; Ostriker et al. 1988, AJ, 96, 1775) on Dec. 27.2 at magnitude R=18.1 (calibrated to USNO-B1.0), also by the LSQ survey. A SNIFS spectrum of LSQ11pn obtained Dec. 28.4 UTC was analyzed with SNID, revealing that the supernova is of Type Ia, just before maximum light.