2005CBET..247....1B

Further to CBET 229, J. Barentine, Apache Point Observatory (APO); B. Bassett, University of Portsmouth (UP); A. Becker, University of Washington; M. Bremer, University of Bristol; 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; A. Edge, University of Durham; E. Elson, South African Astronomical Observatory (SAAO); J. Frieman, Fermilab and UC; P. Garnavich, University of Notre Dame; A. Goobar, Stockholm University; M. Harvanek, APO; J. Holtzman, New Mexico State University; J. Krzesinski, APO; D. Lamenti, San Francisco State University; H. Lampeitl, Fermilab; R. Kessler, UC; B. Ketzeback, APO; K. Konishi, University of Tokyo; D. Long, APO; J. Marriner, Fermilab; J. L. Marshall, OSU; R. McMillan, APO; J. Mendez, University of Barcelona (UB); R. Nichol, UP; K. Pan, APO; J. L. Prieto, OSU; M. Richmond, Rochester Institute of Technology; A. Riess, Space Telescope Science Institute; R. Romani, Stanford University (SU); K. Romer, University of Sussex; P. Ruiz-Lapuente, UB; M. Sako, SU; D. Schneider, Pennsylvania State University; M. Smith, UP; S. Snedden, APO; M. Subbarao, UC and Adler Planetarium; N. Takanashi, University of Tokyo; K. van der Heyden, SAAO; and N. Yasuda, University of Tokyo, on behalf of the Sloan Digital Sky Survey II collaboration, report the discovery of 39 supernovae on multiple g', r', and i' images taken with the SDSS 2.5-m telescope at Apache Point Observatory by the SDSS observing team. Spectroscopy was obtained with the William Herschel telescope, the Hobby Eberly Telescope, Subaru telescope, the ARC 3.5-m telescope, and the MDM 2.4-m telescope, showing thirty of them to be of type Ia and six to be probable type-Ia events (SNe 2005ex, 2005ez, 2005fh, 2005fq, 2005gh, and 2005ge); SN 2005fk is a type-Ibc hypernova, SN 2005gi is a type-II supernova, and SN 2005gj is a probable type-IIn supernova. The magnitudes tabulated below are all g' magnitudes unless followed by an asterisk, in which case they are r' magnitudes due to non-detection in g' on the discovery date. The spectroscopic redshifts in the column labelled z. The peak magnitudes and dates (all 2005) are estimated from fits to the light curves. SN Discov. R.A. (2000.0) Decl. Mag. z Estimated Peak Date Date Mag. 2005ex Sep. 3 1 41 51.24 - 0 52 35.00 19.2 0.09 Aug. 23 19.0 2005ey Sep. 3 2 17 05.50 + 0 16 49.08 20.9 0.13 Sep. 14 19.5 2005ez Sep. 3 3 07 10.97 + 1 07 10.36 21.4* 0.13 Sep. 10 20.3 2005fa Sep. 10 1 39 36.08 - 0 45 31.54 21.1 0.15 Sep. 20 20.3 2005fb Sep. 10 3 01 17.54 - 0 38 38.69 21.2 0.16 Sep. 16 20.6 2005fc Sep. 10 21 21 39.25 + 0 53 40.74 21.7 0.29 Sep. 9 21.7 2005fd Sep. 10 21 35 11.76 + 0 09 47.16 22.3 0.26 Sep. 20 21.1 2005fe Sep. 10 22 19 27.32 + 0 29 39.92 21.1 0.21 Sep. 3 20.9 2005ff Sep. 10 22 30 41.41 - 0 46 35.76 21.0 0.07 Sep. 21 19.3 2005fg Sep. 10 22 36 04.20 - 0 22 30.83 21.8 0.26 Sep. 13 21.6 2005fh Sep. 10 23 17 29.71 + 0 25 45.79 19.8 0.12 Sep. 19 19.1 2005fi Sep. 11 0 07 58.69 + 0 38 17.45 22.4 0.26 Sep. 23 21.1 2005fj Sep. 11 21 11 20.85 - 0 26 43.30 20.2 0.14 Sep. 7 20.2 2005fk Sep. 12 21 15 19.83 - 0 22 58.62 21.8* 0.24 Aug. 3 20.4 2005fl Sep. 13 20 47 21.99 - 1 15 11.89 21.6 0.24 Aug. 29 21.1 2005fm Sep. 13 20 48 10.37 - 1 10 17.11 20.5 0.13 Sep. 20 19.9 2005fn Sep. 13 20 48 53.05 + 0 11 28.02 18.9 0.10 Sep. 1 18.7 2005fo Sep. 13 21 55 46.40 + 0 35 36.71 21.7 0.26 Sep. 19 21.5 2005fp Sep. 14 0 27 13.69 + 1 07 14.22 22.1 0.21 Sep. 18 21.7 2005fq Sep. 14 0 53 44.05 - 0 33 36.76 21.5 0.14 Sep. 13 21.5 2005fr Sep. 14 1 08 22.02 - 0 05 46.74 21.6 0.29 Sep. 14 21.6 2005fs Sep. 14 2 04 52.97 - 0 19 35.26 22.1 0.33 Sep. 18 21.7 2005ft Sep. 14 2 42 04.98 - 0 32 26.99 21.2 0.16 Sep. 19 20.5 2005fu Sep. 14 2 50 32.09 + 0 48 28.13 21.0* 0.20 Sep. 18 20.6 2005fv Sep. 15 3 05 22.43 + 0 51 30.13 21.1 0.11 Sep. 23 19.8 2005fw Sep. 15 3 30 49.04 - 1 14 17.16 20.9 0.16 Sep. 23 19.9 2005fx Sep. 15 22 56 48.34 + 0 24 03.92 21.8 0.29 Sep. 21 21.6 2005fy Sep. 16 3 20 21.70 - 0 53 08.09 21.0 0.20 Sep. 13 20.9 2005fz Sep. 21 22 03 41.21 + 0 34 10.31 20.8 0.12 Sep. 25 20.4 2005ga Sep. 22 1 07 43.76 - 1 02 22.20 21.3 0.16 Sep. 29 20.3 2005gb Sep. 22 1 16 12.58 + 0 47 31.01 19.4 0.09 Sep. 30 18.7 2005gc Sep. 22 1 21 37.62 - 0 58 38.03 21.2 0.17 Sep. 30 20.4 2005gd Sep. 22 1 59 51.03 + 0 38 26.21 21.2 0.16 Sep. 29 20.4 2005ge Sep. 22 2 18 14.72 + 0 47 47.62 22.1 0.19 Oct. 2 21.2 2005gf Sep. 22 22 16 16.63 + 0 42 29.23 21.3 0.24 Sep. 25 21.1 2005gg Sep. 22 22 18 41.16 + 0 38 21.12 21.7 0.23 Sep. 29 21.1 2005gh Sep. 23 20 50 36.35 - 0 21 14.76 21.8 0.25 Sep. 25 21.7 2005gi Sep. 24 0 55 52.68 + 0 30 17.82 19.8 0.05 Sep. 25 19.7 2005gj Sep. 26 3 01 11.95 - 0 33 13.90 18.6 0.06 Oct. 1 17.8 Also, on CBET 229 (due to a clerical error), 2005eh was incorrectly reported as spectroscopically confirmed as a type-Ia event; its three lightcurve measurements in r and i are strongly indicative of a type-Ia supernova, and the host-galaxy spectroscopic redshift measured with the SDSS 2.5-m telescope was correctly reported, but spectroscopy has not been obtained of the supernova itself.