2005CBET..315....1B

Further to CBET 254 and 304, J. Barentine, Apache Point Observatory (APO); B. Bassett, University of Portsmouth (UP); A. Becker, University of Washington; H. Brewington, APO; F. DeJongh, Fermilab; J. Dembicky, APO; D. L. DePoy, Ohio State University (OSU); B. Dilday, University of Chicago (UC); M. Doi, University of Tokyo; E. Elson, South African Astronomical Observatory (SAAO); J. Frieman, Fermilab and UC; P. Garnavich, University of Notre Dame; M. Harvanek, APO; T. Gueth and J. Holtzman, New Mexico State University; K. Konishi, University of Tokyo; J. Krzesinski, APO; H. Lampeitl, Space Telescope Science Institute (STScI); R. Kessler, UC; B. Ketzeback, D. Long, O. Malanushenko, and V. Malanushenko, APO; J. Marriner, Fermilab; J. L. Marshall, OSU; R. McMillan, APO; G. Miknaitis, Fermilab; T. Morokuma, University of Tokyo; R. Nichol, UP; K. Pan, APO; J. L. Prieto, OSU; M. Richmond, Rochester Institute of Technology; A. Riess, STScI; R. Romani and M. Sako, Stanford University; D. Schneider, Pennsylvania State University; M. Smith, UP; S. Snedden, APO; M. Subbarao, UC and Adler Planetarium; N. Takanashi and K. Tokita, University of Tokyo; K. van der Heyden, SAAO; and N. Yasuda, University of Tokyo, on behalf of the Sloan Digital Sky Survey (SDSS) II collaboration, report the discovery of sixteen supernovae on multiple g, r, and i images taken with the SDSS 2.5-m telescope at APO by the SDSS observing team. Spectroscopy was obtained with the Hobby-Eberly Telescope, the Subaru telescope, and the ARC 3.5-m telescope, showing thirteen to be type-Ia events, two to be type-II events (2005lb and 2005lc), and one to be a probable type-II supernova (2005lm). The discovery magnitudes tabulated below are all g magnitudes unless followed by an asterisk, in which case it is an r magnitude due to non-detection in g. Spectroscopic redshifts are given in the column labelled z, but entries with only one significant figure are photometric redshift estimates based on the supernova light curves and colors. Peak g magnitudes and dates (all 2005) are estimated from fits to the multi-band light curves. SN Discov. R.A. (2000.0) Decl. Mag. z Estimated Peak Date Date Mag. 2005lb Sep. 10 22 54 50.05 - 0 15 09.0 18.0 0.03 Sep. 6 17.4 2005lc Sep. 10 3 02 11.18 - 1 09 59.4 18.8 0.01 Aug. 20 17.6 2005ld Nov. 2 21 40 00.48 - 0 00 28.5 22.1 0.1 Nov. 17 19.9 2005le Nov. 2 22 31 32.29 - 0 29 36.8 22.3 0.25 Nov. 12 21.6 2005lf Nov. 3 23 18 42.09 - 1 12 17.5 22.4 0.30 Nov. 10 21.9 2005lg Nov. 3 1 16 20.07 - 0 48 28.1 23.0 0.35 Nov. 10 22.2 2005lh Nov. 4 21 55 48.34 + 1 10 50.9 22.1 0.22 Nov. 13 21.3 2005li Nov. 4 22 23 15.45 + 0 15 10.9 22.6 0.26 Nov. 14 21.6 2005lj Nov. 7 1 57 43.03 - 0 10 46.0 22.5 0.08 Nov. 18 20.1 2005lk Nov. 8 21 59 49.43 - 1 11 37.3 21.7 0.1 Nov. 22 19.4 2005ll Nov. 8 22 28 06.87 - 1 07 41.4 22.5* 0.24 Nov. 20 21.0 2005lm Nov. 10 0 15 04.91 + 0 21 18.5 21.0 0.08 Nov. 19 20.2 2005ln Nov. 20 0 27 00.12 - 0 35 11.8 20.4 0.14 Nov. 25 20.1 2005lo Nov. 24 0 37 11.86 - 1 12 12.3 21.9 0.30 Nov. 28 21.7 2005lp Nov. 24 1 47 42.80 + 0 12 26.0 22.2 0.30 Nov. 15 22.1 2005lq Nov. 24 2 41 36.04 + 0 12 18.1 22.7 0.37 Dec. 1 22.3