2006CBET..680....1B

Further to CBETs 611 and 667, 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 and D. McGinnis, 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 25 new supernovae on multiple 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, University of Stockholm; R. Nichol; J. Sollerman, University of Copenhagen; P. Ruiz-Lapuente and F. Castander, University of Barcelona; A. Romer, University of Sussex, C. Collins, Liverpool John Moores University; and J. Lucey and A. Edge, University of Durham, report that spectroscopy obtained by M. Smith and M. Stritzinger on Oct. 15 and 16 UT with the European Southern Observatory 3.6-m New Technology Telescope shows thirteen of the supernovae (2006jh, 2006ji, 2006jn, 2006jp, 2006jq, 2006jr, 2006js, 2006jt, 2006jy, 2006jz, 2006kb, 2006kc, and 2006kd) to be type-Ia events; 2006ju and 2006jw to be probable type-Ia supernovae; 2006jo to be a type-Ib supernova; and 2006jl to be a type-IIn supernova. Spectroscopic observations with the Subaru 8-m telescope by N. Takanashi, Y. Ihara, T. Morokuma, K. Tokita, K. Konishi, and N. Yasuda on the same night indicate that six of the events (2006jg, 2006jj, 2006jk, 2006jm, 2006jv, and 2006ka) are type-Ia supernova, and 2006jx is a possible type-Ib supernova; they also report that a Subaru spectrum taken on Sept. 18 UT shows 2006jf to be a type-Ia supernova. The discovery magnitudes tabulated below are all SDSS g magnitudes. Spectroscopic redshifts are given in the column labelled "z". Peak dates (all 2006 dates) are approximate estimates from early fits to the multi-band light curves or from the spectra. ----------------------------------------------------------------------------— SN Discov. R.A. (2000.0) Decl. Mag. z Estimated Peak Date ----------------------------------------------------------------------------— 2006jf Sep. 15 22 34 54.57 + 0 00 07.3 22.4 0.28 Sep. 15 2006jg Sep. 17 22 48 26.64 - 0 26 07.0 23.0 0.33 Sep. 29 2006jh Sep. 19 0 06 45.75 - 0 02 12.4 22.6 0.13 Oct. 5 2006ji Sep. 20 20 32 46.79 + 0 55 37.5 21.7 0.18 Oct. 1 2006jj Sep. 27 20 59 34.81 + 1 13 23.7 21.4 0.27 Oct. 5 2006jk Sep. 27 21 52 57.70 + 0 15 13.7 22.7 0.29 Oct. 10 2006jl Sep. 29 20 32 04.67 - 0 34 28.3 19.8 0.05 Oct. 5 2006jm Sep. 29 22 54 12.27 + 1 03 02.3 22.8 0.33 Oct. 8 2006jn Sep. 30 0 30 39.18 + 0 08 29.7 23.1 0.23 Oct. 17 2006jo Sep. 30 1 23 14.72 - 0 19 46.7 21.1 0.08 Oct. 5 2006jp Sep. 30 20 56 56.22 - 0 16 44.6 21.7 0.16 Oct. 12 2006jq Oct. 1 3 37 06.50 + 0 00 33.7 22.7 0.13 Oct. 15 2006jr Oct. 1 3 39 47.15 + 0 59 34.2 22.5 0.18 Oct. 13 2006js Oct. 1 20 55 20.06 - 0 05 34.0 22.6 0.19 Oct. 10 2006jt Oct. 2 21 58 48.06 + 0 11 51.8 21.9 0.14 Oct. 17 2006ju Oct. 2 23 24 39.01 - 0 43 06.0 21.9 0.15 Oct. 13 2006jv Oct. 3 1 30 32.21 + 0 13 11.2 23.3 0.37 Oct. 10 2006jw Oct. 3 2 23 22.30 + 0 49 08.4 22.5 0.25 Oct. 16 2006jx Oct. 3 3 52 14.06 + 0 17 31.5 22.8 0.25 Oct. 12 2006jy Oct. 4 1 02 56.34 + 0 10 59.2 21.7 0.2 Oct. 18 2006jz Oct. 11 0 11 24.80 + 0 42 09.8 21.9 0.20 Oct. 24 2006ka Oct. 11 2 18 26.68 + 0 13 36.0 21.9 0.25 Oct. 16 2006kb Oct. 12 20 19 10.21 - 1 03 52.2 20.2 0.14 Oct. 16 2006kc Oct. 12 22 30 10.61 - 0 24 28.2 21.0 0.22 Oct. 16 2006kd Oct. 13 1 07 50.00 + 0 49 41.5 21.2 0.13 Oct. 10 \rule