Electronic Telegram No. 1167 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) CBAT@CFA.HARVARD.EDU (science) URL http://www.cfa.harvard.edu/iau/cbat.html SUPERNOVAE 2007rg AND 2007sb-2007sn Further to CBETs 611 and 1146, 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; 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 Cosmology Centre; 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 thirteen type-Ia supernovae on g, r, and i images taken with the SDSS 2.5-m telescope at APO by the SDSS observing team. R. Romani, C. Zheng, M. Sako, C. Wheeler, D. Schneider, and R. Bender, together with and U. Hopp (University of Munich) and W. Kollatschny (University of Goettingen), report confirming spectroscopy that was obtained at the Hobby-Eberly Telescope on on Nov. 5 and 9 UT for 2007sc and 2007sk, and on Nov. 17 for 2007sb. J. L. Prieto and D. DePoy report confirming spectroscopy for 2007sh and 2007si that was obtained by R. Assef and D. Atlee (OSU) on the Hiltner 2.4-m telescope at MDM Observatory on Nov. 23 and 25. 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 (ICE/CSIC, Barcelona), A. K. Romer (University of Sussex), C. Collins (Liverpool John Moores University), and J. Lucey and A. Edge (University of Durham) report confirming spectroscopy of 2007sl and 2007sm that was obtained by D. Wake (Durham) on Dec. 3 at the William Herschel 4.2-m telescope, and confirming spectroscopy for 2007sd, 2007se, 2007sf, 2007sg, 2007sj, and 2007sn that was obtained by M. Smith and A. K. Romer on Dec. 7, 8, and 9 at the European Southern Observatory's New Technology Telescope. 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 from fits to the early light curves, with a typical uncertainty of plus-or-minus two days. SN Discov. R.A. (2000.0) Decl. Mag. z Estimated Type Date UT Peak Date 2007sb Oct. 11 0 41 23.75 + 0 24 43.0 22.0 0.21 Oct. 20 Ia 2007sc Nov. 11 2 15 11.87 + 0 32 09.3 22.1 0.27 Nov. 20 Ia 2007sd Nov. 11 3 32 00.58 - 0 39 42.7 21.0 0.09 Nov. 21 IIP 2007se Nov. 12 22 12 37.10 + 0 47 48.2 22.3 0.18 Nov. 27 Ia 2007sf Nov. 12 22 48 59.11 + 1 12 21.9 22.3 0.10 Nov. 29 Ia 2007sg Nov. 12 23 19 26.09 - 0 54 05.9 22.7 0.19 Nov. 28 Ia 2007sh Nov. 12 0 29 24.67 + 0 49 53.4 21.2 0.15 Nov. 26 Ia 2007si Nov. 12 1 59 51.14 + 1 12 59.3 20.8 0.13 Nov. 22 Ia 2007sj Nov. 17 0 10 39.63 - 0 03 10.2 21.2 0.04 Nov. 29 Ib/c 2007sk Nov. 17 1 27 05.25 + 1 12 54.5 21.9 0.23 Nov. 27 II 2007sl Nov. 17 21 13 42.82 - 0 50 16.0 21.3 0.10 Dec. 5 Ia 2007sm Nov. 27 21 22 50.57 + 0 25 17.9 20.4 0.06 Dec. 14 Ia 2007sn Nov. 27 22 14 04.42 - 0 12 47.5 21.3 0.14 Dec. 11 Ia Corrigendum. Re-analysis of the spectrum of 2007rg (cf. CBET 1146) by M. Sullivan (University of Oxford) indicates that its redshift is 0.27. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2007 CBAT 2007 December 12 (CBET 1167) Daniel W. E. Green