2006CBET..650....1B

Further to CBET 611, B. Bassett, South African Astronomical Observatory (SAAO); A. Becker, University of Washington (UW); H. Brewington, Apache Point Observatory (APO); C. Choi, Seoul National University (SNU); D. Cinabro, Wayne State University; F. DeJongh, Fermilab; J. Dembicky, APO; D. L. DePoy, Ohio State University (OSU); B. Dilday, University of Chicago (UC); M. Doi, University of Tokyo (UoT); J. Frieman, Fermilab and UC; P. Garnavich, University of Notre Dame; M. Harvanek, APO; C. Hogan, UW; J. Holtzman, New Mexico State University; M. Im, SNU; S. Jha, Stanford University (SU); K. Konishi, UoT; 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; R. McMillan, APO; G. Miknaitis, Fermilab; T. Morokuma, UoT; R. Nichol, University of Portsmouth (UP); K. Pan, APO; J. L. Prieto, OSU; M. Richmond, Rochester Institute of Technology; A. Riess, STScI; R. Romani, SU; M. Sako, University of Pennsylvania; G. Saurage, APO; D. Schneider, Pennsylvania State University; M. Smith, UP; S. Snedden, APO; N. Takanashi and K. Tokita, UoT; K. van der Heyden, SAAO; S. Watters, APO; C. Wheeler, University of Texas; N. Yasuda, UoT; and C. Zheng, SU, on behalf of the Sloan Digital Sky Survey II collaboration, report the discovery of eleven new type-Ia supernovae on multiple g, r, and i images taken with the SDSS 2.5-m telescope at APO by the SDSS observing team. The spectroscopic observations of 2006hc, 2006hf, and 2006hl were obtained by P. Garnavich and J. Prieto with the Kitt Peak National Observatory 4-m telescope on Sept. 26 and 27 UT, while spectroscopic observations of the other eight new supernovae were made by Romani, Zheng, Sako, Wheeler, and Schneider, together with U. Hopp (University of Munich) and W. Kollatschny (University of Goettingen), with the Hobby Eberly Telescope on Sept. 22-26. The discovery magnitudes tabulated below are all SDSS g magnitudes. Spectroscopic redshifts are given in the column labelled "z". Peak dates (all 2006) are approximate estimates from early fits to the multi-band light curves. ----------------------------------------------------------------------------— SN Discov. R.A. (2000.0) Decl. Mag. z Estimated Peak Date ----------------------------------------------------------------------------— 2006hc Sept.11 1 09 34.73 + 0 42 14.9 21.3 0.2 Sept.21 2006hd Sept.11 21 44 03.55 + 0 43 34.6 21.6 0.30 Sept.12 2006he Sept.11 22 04 24.11 + 0 41 28.4 21.9 0.21 Sept.21 2006hf Sept.11 23 00 52.49 - 0 58 52.1 21.8 0.22 Sept.25 2006hg Sept.16 1 40 58.41 - 0 43 40.3 21.9 0.24 Sept.15 2006hh Sept.16 2 42 26.97 - 0 47 38.9 21.9 0.24 Sept.21 2006hi Sept.17 1 23 46.04 + 0 49 0.0 23.0 0.26 Sept.24 2006hj Sept.18 21 10 21.14 + 0 55 57.5 21.3 0.23 Sept.18 2006hk Sept.18 23 20 29.54 - 1 09 28.2 21.3 0.29 Sept.18 2006hl Sept.18 23 22 45.98 + 0 31 58.4 21.1 0.15 Sept.25 2006hm Sept.18 23 26 14.81 - 0 22 56.1 22.2 0.33 Sept.10 \rule