2007CBET.1079....1B

Further to CBETs 611 and 1076, B. Bassett, South African Astronomical Observatory (SAAO); A. Becker, University of Washington (UW); D. Bizyaev and H. Brewington, Apache Point Observatory (APO); C. Choi, Seoul National University (SNU); D. Cinabro, Wayne State University (WSU); C. D'Andrea, University of Pennsylvania (Penn); J. Dembicky, APO; D. L. DePoy, Ohio State University (OSU); B. Dilday, University of Chicago (UC); M. Doi, University of Tokyo (UoT); J. Eastman, OSU; J. Frieman, Fermilab and UC; C. Gall, Dark Cosmology Centre (DCC), University of Copenhagen; P. Garnavich, University of Notre Dame (UND); A. Goobar, Stockholm University; C. Hogan, UW; J. Holtzman, New Mexico State University; M. Im, SNU; S. Jha, Rutgers University; K. Konishi, UoT; J. Krzesinski, APO; H. Lampeitl, University of Portsmouth (UP); R. Kessler, UC; B. Ketzeback, D. Long, O. Malanushenko, and V. Malanushenko, APO; J. Marriner, Fermilab; R. McMillan, APO; G. Miknaitis, Fermilab; T. Morokuma, National Astronomical Observatory of Japan; J. Mosher, Penn; R. Nichol, UP; D. Oravetz and K. Pan, APO; L. Ostman, Stockholm University, J. L. Prieto, OSU; M. Richmond, Rochester Institute of Technology; A. Riess, Space Telescope Science Institute; R. Romani, Stanford University (SU); M. Sako, Penn; D. Schneider, Pennsylvania State University; A. Simmons, APO; M. Smith, UP; S. Snedden, APO; J. Sollerman and M. Stritzinger, DCC; N. Takanashi and K. Tokita, UoT; M. F. Taylor, WSU; K. van der Heyden, University of Cape Town; S. Watters, APO; N. Yasuda, UoT; C. Wheeler, University of Texas, and C. Zheng, SU, on behalf of the Sloan Digital Sky Survey (SDSS) II collaboration, report the discovery of sixteen supernovae on g, r, and i images taken with the SDSS 2.5-m telescope at APO by the SDSS observing team. A. Aragon-Salamanca (University of Nottingham), M. Bremer (University of Bristol), M. Turatto (University of Padova), A. Goobar, R. Nichol, J. Sollerman, P. Ruiz-Lapuente (University of Barcelona), F. Castander (Institut de Ciencies de l'Espai, Centre d'Estudis Avancats de Blanes, Barcelona), A. K. Romer (University of Sussex), C. Collins (Liverpool John Moores University), and J. Lucey and A. Edge (University of Durham) report that confirming spectroscopy was obtained with the European Southern Observatory's New Technology Telescope on the night of Sept. 18 for 2007ji, 2007jj, 2007jl, 2007jo, 2007js, 2007jv, and 2007jw by M. Smith and L. Ostman. M. Stritzinger, C. Gall, and J. Sollerman report that spectroscopy was obtained by Stritzinger and Gall on the Nordic Optical Telescope on the night of Sept. 18 for 2007jk, 2007jp, 2007jq, 2007jt, and 2007jx. Garnavich and M. Russell (UND) report that confirming spectroscopy was obtained by them on the Kitt Peak National Observatory 4-m telescope on Sept. 18 for 2007jm, 2007jn, 2007jr, and 2007ju. The discovery magnitudes tabulated below are all g magnitudes; spectroscopic redshifts are given in the column labelled z. Peak dates (all 2007) are approximate estimates either from fits to the early light curves or from the spectra, with a typical uncertainty of plus-or-minus several days; in cases where such estimates are either uncertain or very discrepant, they are not reported. Spectroscopic types marked with a question mark (?) imply that the type identification based on the spectrum is uncertain. SN Discov. R.A. (2000.0) Decl. Mag. z Estimated Type Date UT Peak Date 2007ji Sept. 3 0 38 48.36 - 0 10 45.5 21.1 0.18 – Ia 2007jj Sept. 3 1 45 26.73 - 0 01 09.9 20.7 0.24 Sept. 1 Ia 2007jk Sept. 3 2 55 05.64 - 0 08 50.8 21.9 0.18 Sep. 13 Ia 2007jl Sept. 3 21 29 16.94 - 1 00 11.5 21.7 0.26 Sep. 15 Ia 2007jm Sept. 3 21 55 38.59 - 0 10 36.3 20.5 0.09 Aug. 9 IIn 2007jn Sept. 3 22 47 31.99 + 0 24 52.5 20.6 0.06 Sept. 3 II 2007jo Sept. 3 23 10 12.58 - 0 55 53.1 20.6 0.19 Aug. 30 Ia 2007jp Sept. 3 23 44 41.24 - 0 01 48.3 20.4 0.18 Sept. 8 Ia 2007jq Sept. 4 0 11 58.61 + 0 59 53.4 20.1 0.16 Aug. 30 Ia 2007jr Sept. 4 2 22 57.28 + 1 01 32.7 18.8 0.09 Aug. 24 Ia 2007js Sept. 5 20 36 48.67 + 0 05 54.4 20.2 0.17 – Ia 2007jt Sep. 12 2 28 32.78 - 1 02 31.6 20.4 0.14 Sep. 20 Ia 2007ju Sep. 14 0 11 50.46 - 0 20 21.1 19.9 0.06 Sep. 18 Ic? 2007jv Sep. 14 0 15 36.91 - 0 23 21.6 21.0 0.16 Sep. 20 Ia? 2007jw Sep. 14 2 02 32.74 - 1 05 21.0 21.6 0.14 Sep. 23 Ia 2007jx Sep. 15 20 02 32.82 + 0 22 18.1 21.0 0.18 Sep. 17