2010CBET.2350....1C

P. Challis, R. J. Foley, and R. Chornock, Harvard-Smithsonian Center for Astrophysics (CfA); M. Huber, Johns Hopkins University (JHU); A. Rest, G. Narayan, E. Berger, R. P. Kirshner, A. M. Soderberg, and C. Stubbs, CfA; J. Tonry, Institute for Astronomy (IfA), University of Hawaii; A. Riess, JHU; W. M. Wood-Vasey, University of Pittsburgh; S. J. Smartt, Queens University, Belfast; and P. A. Price, E. Magnier, K. Chambers, N. Kaiser, J. Morgan, W. Burgett, J. Heasley, W. Sweeney, C. Waters, and H. Flewelling, IfA, report the discovery and spectroscopic confirmation of 22 moderate-redshift supernovae found in the Pan-STARRS1 Medium Deep Survey. All spectra (range 344-866 nm) were obtained using the Blue Channel spectrograph on the 6.5-m MMT between June 16 and 18 UT. These observations are part of a large program for PS1 transients classification at the MMT. Below are tabulated the discovery data (including magnitudes in bandpasses r and i), the spectral type, the redshift (z), and the last three characters of the PS1 designation (which are all prefixed by 'PS1-1000'). The spectroscopic identifications were performed by cross-correlating with a library of supernova-spectra templates using the SNID code of Blondin and Tonry (2007, Ap.J. 666, 1024). Redshifts were determined from the host galaxies where possible (and then given to 0.001) or from SNID (and then given to 0.01).

---------------------------------------------------------------------------— SN 2010 UT R.A. (2000.0) Decl. Mag. Type z PS1 ---------------------------------------------------------------------------— 2010ez May 10 12 17 50.298 +47 26 48.31 21.1r Ia 0.279 273 2010fa May 13 14 13 01.869 +54 27 46.62 21.9r Ia 0.373 279 2010fb May 31 16 08 18.404 +54 54 29.21 22.2r Ia 0.336 280 2010fc May 31 16 14 28.709 +54 43 33.00 22.5r Ia 0.233 269 2010fd June 1 14 07 14.931 +53 59 51.45 22.4i Ia 0.53 272 2010fe June 1 16 08 52.649 +55 00 17.44 22.4i Ia 0.43 271 2010ff June 3 14 09 19.942 +54 15 45.16 22.9r Ia 0.270 274 2010fg June 6 12 16 41.567 +46 41 23.94 22.8r Ia 0.241 275 2010fh June 6 14 17 18.587 +53 58 41.89 22.3r Ia 0.387 276 2010fi June 6 16 05 44.829 +56 04 27.90 22.1r Ia 0.331 290 2010fj June 6 16 06 48.803 +54 58 51.38 23.1r Ia 0.55 286 2010fk June 6 16 11 19.406 +53 38 14.98 22.1r IIb 0.14 285 2010fl June 6 16 13 48.216 +55 36 30.66 21.5r Ia 0.36 283 2010fm June 6 16 17 47.710 +55 18 08.25 21.6r Ia 0.36 282 2010fn June 6 16 18 15.870 +55 23 04.94 21.9r Ia 0.323 291 2010fo June 6 16 18 53.806 +55 46 58.50 22.0r Ia 0.347 289 2010fp June 15 12 14 06.501 +46 59 32.37 22.3r Ia 0.35 296 2010fq June 15 12 21 59.468 +45 50 49.95 22.5r Ia 0.379 295 2010fr June 15 14 11 57.763 +52 04 18.57 22.3r Ia 0.45 292 2010fs June 15 14 14 03.337 +53 21 43.84 22.3r Ia 0.441 298 2010ft June 15 16 01 15.408 +54 17 53.52 21.8r Ia 0.42 293 2010fu June 16 12 21 46.463 +46 39 13.28 22.6i Ia 0.459 277 ---------------------------------------------------------------------------—

The authors 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 (see the following website URL for more information: http://www.ps1sc.org/PS1_System_IAU.shtml).