Electronic Telegram No. 745 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://cfa-www.harvard.edu/iau/cbat.html SUPERNOVAE 2006ob-2006op Further to CBETs 611 and 743, 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 fourteen new supernovae on multiple g, r, and i images taken with the SDSS 2.5-m telescope at APO by the SDSS observing team, thirteen of them confirmed as type-Ia events and the other a probable type-Ia supernova. Romani, Zheng, Sako, Wheeler, and Schneider, together with U. Hopp (University of Munich) and W. Kollatschny (University of Goettingen), report that spectroscopic observations with the Hobby Eberly Telescope on Nov. 18 and 19 UT indicate that 2006oc, 2006oj, 2006oo, and 2006oe are type-Ia supernovae. Spectroscopic observations on Nov. 18 and 19 with the Kitt Peak National Observatory 4-m reflector by P. Garnavich, M. Florack, A. Hirschauer, and D. O'Connor (all at the University of Notre Dame) showed that 2006om, 2006od, 2006og, and 2006oi are type-Ia supernovae. J. Eastman, J. L. Prieto, L. Watson, R. Assef, K. Schlesinger, and D. DePoy, OSU; and A. Crotts, Columbia University, report that spectroscopic observations by C. Morgan (OSU and U.S. Naval Observatory), and M. Eyler (USNO) with the Hiltner 2.4-m telescope at MDM Observatory on Nov. 17, 18, and 19 indicate that 2006ol, 2006on, 2006oh, 2006of, and 2006ok are type-Ia supernovae and that 2006op is a probable type-Ia supernova. In addition, CBET 743 mistakenly reported that the spectrum of SN 2006ob was similar to that of SN 1991bg; in fact, it appears to be a normal type-Ia event. 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 or from the spectra. SN Discov. R.A. (2000.0) Decl. Mag. z Estimated Date UT Peak Date 2006oc Oct. 17 23 02 48.35 - 0 52 35.1 22.3 0.27 Oct. 28 2006od Oct. 23 2 07 54.31 - 0 32 07.4 22.1 0.17 Nov. 4 2006oe Oct. 28 23 21 27.00 + 1 07 56.9 22.0 0.34 Nov. 1 2006of Oct. 29 0 32 25.86 - 1 03 14.4 21.5 0.16 Nov. 10 2006og Oct. 29 20 12 04.27 + 0 34 14.2 21.8 0.16 Nov. 11 2006oh Oct. 29 23 41 12.48 - 1 06 20.9 22.2 0.16 Nov. 15 2006oi Oct. 31 0 35 53.05 + 0 15 30.3 22.3 0.20 Nov. 12 2006oj Oct. 31 1 08 49.30 - 0 59 22.4 22.2 0.34 Nov. 1 2006ok Nov. 1 1 07 28.34 - 0 16 09.7 21.8 0.10 Nov. 14 2006ol Nov. 1 23 28 07.19 + 0 51 22.9 21.6 0.12 Nov. 12 2006om Nov. 8 1 22 18.88 + 1 00 38.2 21.5 0.16 Nov. 19 2006on Nov. 11 21 55 58.49 - 1 04 12.7 20.7 0.07 Nov. 26 2006oo Nov. 11 21 59 47.23 - 0 43 59.6 22.1 0.28 Nov. 19 2006op Nov. 17 21 21 31.86 + 0 59 35.9 21.6 0.03 Nov. 25 M. Baek and W. Li report the independent LOSS (cf. IAUC 8771) discovery of 2006ob on unfiltered KAIT images taken on Nov. 18.29 (at mag 17.9) and 19.31 UT (mag 17.6). Their measured position for 2006ob is R.A. = 1h51m48s.11, Decl. = +0o15'48".3 (equinox 2000.0), which is 5".5 west and 1".6 south of the center of UGC 1333. KAIT images taken on Oct. 29.30 (limiting mag 18.9) and Nov. 7.31 (limiting mag 18.5) showed nothing at the position of 2006ob. P. Garnavich, A. Hirschauer, and M. Florack, University of Notre Dame, report that a spectrum of SN 2006ob was obtained with the Kitt Peak 4-m Mayall telescope (+ R-C spectrograph) on Nov. 19.22 UT in poor seeing. The spectrum shows strong Si II absorption and other features characteristic of an early type-Ia supernova. Comparison of the spectrum of 2006ob with other supernovae spectra in the CfA Supernova Archive (http://cfa-www.harvard.edu/oir/Research/supernova/SNarchive.html) shows an excellent match with SN 1994D at four days before maximum light. The Ca II absorption is seen with two minima and suggests a high velocity component, as in SN 1994D (Branch et al. 2005, PASP 117, 545). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2006 CBAT 2006 November 20 (CBET 745) Daniel W. E. Green