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Classification of LSQ12dcl as a Type II SN

ATel #4223; E. Hadjiyska (Yale), D. Rabinowitz (Yale), C. Baltay (Yale), N. Ellman (Yale), R. McKinnon (Yale), U. Feindt (U. Bonn), P. Nugent (LBNL/UCB), M. Phillips (LCO), E. Hsiao (LCO), N. Morrell (LCO), C. Contreras (LCO) , J. Prieto (Princeton)
on 28 Jun 2012; 16:45 UT
Credential Certification: Ellie Hadjiyska (ellie.hadjiyska@yale.edu)

Subjects: Optical, Supernovae, Transient

We report the discovery of a Type II SN on June 24.39 (when the variable was at magnitude R = 18.8 and detection of the same on June 08.40), as part of the La Silla-QUEST (LSQ) transient survey. Photometry is calibrated to the USNO-B1.0 catalog. The source's position is RA = 00:13:43.34, Dec = -00:27:58.4 (J2000). A near-infrared spectrum (range 830-2500 nm) of LSQ12dcl was obtained on June 26 UT (JD 2456104.95) with the Folded-port Infrared Echellette (FIRE) spectrograph on the 6.5-m Magellan Baade Telescope. The spectrum shows that LSQ12dcl is a type-II supernova with developed hydrogen Paschen lines. The near-infrared spectrum at rest frame, using the redshift for the presumed host galaxy (SDSS J001343.81-002735.7) of z = 0.031, is similar to that of SN 2012aw.