2007CBET.1135....1B

Further to CBETs 611 and 1128, B. Bassett, South African Astronomical Observatory and University of Cape Town (UCT); 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; P. Garnavich, University of Notre Dame; A. Goobar, Stockholm University; C. Hogan, UW; J. Holtzman, New Mexico State University; M. Im, SNU; S. Jha, Rutgers University; R. Kessler, UC; B. Ketzeback, APO; K. Konishi, UoT; J. Krzesinski, APO; H. Lampeitl, University of Portsmouth (UP); G. Leloudas, Dark Cosmology Centre (DARK), University of Copenhagen; 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, DARK; N. Takanashi and K. Tokita, UoT; M. F. Taylor, WSU; K. van der Heyden, UCT; S. Watters, APO; N. Yasuda, UoT; C. Wheeler, University of Texas; and C. Zheng, SU, on behalf of the Sloan Digital Sky Survey II collaboration, report the discovery of fifteen supernovae on g, r, and i images taken with the SDSS 2.5-m telescope at APO by the SDSS observing team. J. Marriner, D. McGinnis (Fermilab), G. Miknaitis, A. Becker, J. Frieman, J. Holtzman, and A. Riess report confirming spectroscopy of 2007pt, 2007pu, 2007qa, and 2007qb that was obtained at the ARC 3.5-m telescope on Nov. 9 and 10 UT. R. Romani, C. Zheng, M. Sako, C. Wheeler, D. Schneider, and R. Bender, together with U. Hopp (University of Munich) and W. Kollatschny (University of Goettingen), report confirming spectroscopy that was obtained at the Hobby-Eberly Telescope on Nov. 8, 9, and 10 for 2007pn, 2007po, 2007pp, 2007pq, 2007pr, 2007ps, 2007pv, 2007pw, and 2007py. L. Watson (OSU) and J. Prieto report confirming spectroscopy of 2007px and 2007pz that was obtained at the Hiltner 2.4-m telescope at MDM Observatory on the night of Nov. 9. 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. 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 2007pn Oct. 12 2 16 33.90 - 0 43 20.5 22.5 0.31 Oct. 20 Ia? 2007po Oct. 13 3 35 32.23 + 0 42 12.1 22.1 0.29 Oct. 17 Ia 2007pp Oct. 15 3 11 01.16 + 0 21 24.3 22.2 0.26 Oct. 20 Ia 2007pq Oct. 15 22 37 13.94 + 0 44 11.0 22.1 0.19 Oct. 30 Ia 2007pr Oct. 20 23 06 13.03 + 0 19 44.3 22.9 0.33 Oct. 27 Ia 2007ps Oct. 21 2 19 13.53 - 0 23 05.4 21.8 0.25 Oct. 28 Ia 2007pt Oct. 29 2 07 38.51 - 0 19 26.4 20.5 0.18 Oct. 31 Ia 2007pu Oct. 29 22 45 58.15 - 0 38 55.4 21.6 0.09 Nov. 16 Ia 2007pv Oct. 30 21 59 45.15 + 1 07 37.0 21.5 0.26 Nov. 6 Ia 2007pw Oct. 30 23 37 34.65 + 0 14 53.2 21.6 0.25 Nov. 2 Ia 2007px Nov. 2 0 22 44.01 - 0 28 44.4 23.1 0.11 Nov. 14 Ia 2007py Nov. 4 3 29 31.60 + 0 30 56.0 22.4 0.21 Nov. 11 Ia 2007pz Nov. 4 3 30 25.18 + 1 00 33.9 20.9 0.13 Nov. 15 Ia 2007qa Nov. 5 1 52 33.92 + 1 14 38.7 22.5 0.11 Nov. 15 Ia 2007qb Nov. 8 0 59 18.73 - 0 56 49.4 20.2 0.08 Nov. 19 II