La Silla-QUEST detection and Las Campanas Spectroscopic confirmation of Type II SN (LSQ11gw)
ATel #3828; E. Hadjiyska (Yale), D. Rabinowitz (Yale), C. Baltay (Yale), N. Ellman (Yale), R. McKinnon (Yale), P. Nugent (LBNL), M. Phillips (LSO), E. Hsiao (LSO)
on 25 Dec 2011; 17:28 UT
Credential Certification: Ellie Hadjiyska (firstname.lastname@example.org)
Subjects: Optical, Supernovae
Referred to by ATel #: 3832
We report the discovery of a Type II SN at z=0.040 on December 23.075 (when the variable was at magnitude R =18.09), as part of the La Silla-QUEST (LSQ) transient survey conducted with Yale University's 160-megapixel QUEST camera on the 1.0-m Schmidt Telescope of the European Southern Observatory at La Silla, Chile (Rabinowitz et al. 2011, Ap.J. 732, 512). Photometry is calibrated to the USNO catalog. The source's position is RA= 05:19:37.2, Dec = 00:49:39 (J2000). LSQ observations taken during December 15-23 UT reveal a gradual brightness increase by > 1.3 mag. The spectrum of LSQ11gw was taken as part of the Carnegie Supernova Project on 2011 Dec 23.2 UT with the WFCCD spectrograph on the du Pont 2.5 m telescope at Las Campanas. Wavelength coverage was 370-950 nm. Comparison with a library of supernova spectra using the "superfit" program of Howell et al. (2005, Ap.J. 634, 1190) indicates that LSQ11ne is a Type II supernova near maximum light.