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Spectroscopic Confirmation of PS1 MDS Supernova Discoveries With the MMT

ATel #3190; R. Chornock, I. Czekala (Harvard/CfA), M. Huber (JHU), R. J. Foley (Harvard/CfA), A. Rest (STScI), G. Narayan, E. Berger, P. Challis, R. P. Kirshner, A. M. Soderberg, C. Stubbs (Harvard/CfA), J. Tonry (IfA), A. Riess (JHU), W. M. Wood-Vasey (Pitt), S. J. Smartt (QUB), E. Magnier, K. Chambers, N. Kaiser, J. Morgan, W. Burgett, J. Heasley, W. Sweeney, C. Waters, H. Flewelling (IfA), and P. A. Price (Princeton)
on 25 Feb 2011; 07:09 UT
Credential Certification: Ryan Chornock (chornock@astro.berkeley.edu)

Subjects: Optical, Supernovae, Transient

We report the spectroscopic confirmation of supernova candidates found in the Pan-STARRS1 Medium Deep Survey. All spectra (range 3310-8480 Angstroms) were obtained using the Blue Channel spectrograph on the 6.5-m MMT on 2011 February 22 and 23 UT. These observations are part of a large Harvard/CfA program for PS1 transients classification at the MMT (PI: Berger).

PS1 Name   RA (J2000)      Dec      Disc. Date(UT) AB Mag Type Redshift 
PS1-11fi  14:12:57.070 +52:44:37.19  2011-02-02    i=19.4 Ia   0.082 
PS1-11fl  14:05:19.151 +53:07:24.23  2011-02-02    i=20.7 IIP  0.096 
PS1-11iv  12:14:55.583 +46:34:33.27  2011-02-02    i=21.4 Ia   0.293 
PS1-11jo  12:16:00.420 +47:55:13.52  2011-02-02    i=22.5 Ia   0.33 
PS1-11ka  12:16:26.983 +47:01:28.37  2011-02-04    r=20.5 Ib/c 0.024 
PS1-11kk  16:10:49.278 +55:15:05.25  2011-02-03    z=22.7 Ia   0.30 
PS1-11kl  16:21:20.254 +55:00:19.76  2011-02-10    r=21.3 Ia   0.26 
PS1-11li  12:16:14.104 +46:20:46.00  2011-02-10    r=21.7 IIP  0.068 

PS1-11ka is in the nearby galaxy NGC 4226, but was discovered several months after maximum light.

Listed magnitudes are from the time of discovery. Identifications were performed by cross-correlating with a library of SN templates using the SNID (Blondin & Tonry 2007, ApJ, 666, 1024) code. Redshifts were determined from host galaxies where possible (3 significant figures) or from SNID (2 significant figures).

We thank the PS1 and MMT telescope staffs for their assistance with these observations. These discoveries were enabled using the PS1 System operated by the PS1 Science Consortium (PS1SC) and its member institutions, and made possible through the PS1 Builders: http://www.ps1sc.org/PS1_System_ATel.shtml.