2005CBET..268....1B

Further to CBETs 254 and 259, J. Barentine, Apache Point Observatory (APO); B. Bassett, University of Portsmouth (UP); A. Becker, University of Washington; R. Bender, University of Munich (UM); 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; T. Gueth and J. Holtzman, New Mexico State University; U. Hopp, UM; W. Kollatschny, Goettingen University; K. Konishi, University of Tokyo; 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); G. Miknaitis, Fermilab; T. Morokuma, University of Tokyo; 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 and K. Tokita, University of Tokyo; K. van der Heyden, SAAO; C. Wheeler, University of Texas; and N. Yasuda, University of Tokyo, on behalf of the Sloan Digital Sky Survey II collaboration, report the discovery of 27 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 Subaru telescope, the Hobby-Eberly Telescope, the William Herschel Telescope, and the 2.4-m MDM telescope, showing 23 of the supernovae to be of type Ia, one to be a probable type-Ia event (SN 2005hq), and two (2005hl and 2005hm) to be of type Ib. The discovery g magnitudes are tabulated below (except for SN 2005id, which is an r magnitude because it was not detected with the g filter). Spectroscopic redshifts are given in the column labelled z where available. Peak g magnitudes and dates (all 2005) are estimated from fits to the multi-band light curves. SN 2005hk in UGC 272, announced on IAUC 8625, was independently discovered with the SDSS telescope on Oct. 28, with the following magnitudes also available: u = 18.6, r = 19.0, i = 19.3, z = 19.6; 2005hk was not detected on SDSS images taken two days earlier. SN Discov. R.A. (2000.0) Decl. Mag. z Estimated Peak Date Date Mag. 2005hk Oct. 28 0 27 50.9 - 1 11 53.3 18.8 2005hl Sep. 12 20 55 19.79 + 0 32 34.7 18.9 0.02 Aug. 27 17.4 2005hm Sep. 15 21 39 00.65 - 1 01 38.7 20.6 0.03 Sep. 4 18.2 2005hn Sep. 23 21 57 04.25 - 0 13 24.5 23.0 0.1 Oct. 8 19.7 2005ho Sep. 26 0 59 24.10 + 0 00 09.4 20.9 0.06 Oct. 13 17.9 2005hp Oct. 2 20 28 52.60 - 0 46 45.3 22.2 0.18 Oct. 12 20.8 2005hq Oct. 2 20 50 19.78 - 0 49 31.0 23.0 0.41 Oct. 9 22.5 2005hr Oct. 3 3 18 33.83 + 0 07 24.1 22.7 0.12 Oct. 17 19.5 2005hs Oct. 3 3 29 22.06 - 1 05 40.9 22.9 0.3 Oct. 10 21.8 2005ht Oct. 11 20 50 24.61 - 0 10 04.4 21.5 – Oct. 19 20.7 2005hu Oct. 11 21 54 40.79 + 0 24 48.4 22.6 0.22 Oct. 21 21.5 2005hv Oct. 11 22 12 43.86 - 0 02 05.7 21.3 – Oct. 16 20.8 2005hw Oct. 11 0 09 28.47 + 1 09 17.7 22.8 0.41 Oct. 19 22.4 2005hx Oct. 11 0 13 00.13 + 0 14 53.6 20.6 0.12 Oct. 19 19.6 2005hy Oct. 11 0 14 23.59 + 0 19 59.0 21.7 – Oct. 24 19.7 2005hz Oct. 11 0 46 32.20 + 0 50 17.7 20.9 – Oct. 19 20.0 2005ia Oct. 11 1 11 35.03 - 0 00 21.2 21.7 0.25 Oct. 17 21.3 2005ib Oct. 11 1 31 25.69 - 0 36 12.2 22.9 0.39 Oct. 7 22.8 2005ic Oct. 12 21 51 08.69 - 0 50 34.6 22.0 0.31 Oct. 16 22.1 2005id Oct. 12 23 16 33.32 - 0 39 47.5 21.5* – Oct. 23 20.2 2005ie Oct. 12 2 19 02.54 - 0 16 22.2 22.1 0.28 Oct. 22 21.5 2005if Oct. 14 3 30 12.87 - 0 58 28.5 19.1 0.07 Oct. 19 18.8 2005ig Oct. 20 22 30 31.48 - 0 30 09.6 21.9 0.28 Oct. 19 21.6 2005ih Oct. 20 0 07 13.58 + 0 20 56.3 22.6 0.26 Oct. 26 21.6 2005ii Oct. 20 0 13 03.73 - 0 37 12.5 22.3 0.30 Oct. 25 21.9 2005ij Oct. 21 3 04 21.26 - 1 03 46.6 20.6 – Oct. 25 20.1 2005ik Oct. 23 21 31 15.60 - 1 03 25.2 22.2 0.31 Oct. 28 21.9