[IAUC] CBET 1061: 20070912 : SUPERNOVAE 2007ih-2007ik

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                                                  Electronic Telegram No. 1061
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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CBAT en CFA.HARVARD.EDU (science)
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SUPERNOVAE 2007ih-2007ik
     Further to CBETs 611 and 1057, B. Bassett, South African Astronomical
Observatory; 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; 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 (UT); J. Eastman, OSU; J. Frieman, Fermilab and UC; P.
Garnavich, University of Notre Dame; C. Hogan, UW; J. Holtzman, New Mexico
State University; M. Im, SNU; S. Jha, Rutgers University; K. Konishi, UT;
J. Krzesinski, APO; H. Lampeitl, University of Portsmouth (UP); R. Kessler,
UC; B. Ketzeback, 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; 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; N.
Takanashi and K. Tokita, UT; K. van der Heyden, University of Cape Town; S.
Watters, APO; N. Yasuda, UT; C. Wheeler, University of Texas; and C. Zheng,
SU, on behalf of the Sloan Digital Sky Survey (SDSS) II collaboration,
report the discovery of four type-Ia supernovae on g, r, and i images taken
with the SDSS 2.5-m telescope at APO by the SDSS observing team.
Spectroscopy was obtained by D. Atlee, J. Eastman, and J. Prieto (OSU) with
the Hiltner 2.4-m telescope at MDM Observatory on the night of Sept. 10;
2007ii is a probable type-Ia supernova.  The discovery magnitudes tabulated
below are all g magnitudes; spectroscopic redshifts are given in the
column labelled z.  Peak dates in 2007 are approximate estimates from the
spectra, with a typical uncertainty of +/- 2 to 3 days.

SN       Discov.       R.A. (2000.0) Decl.     Mag.    z    Estimated
         Date UT                                            Peak Date
2007ih   Sept. 3    21 33 10.77  - 0 57 36.5   20.8   0.17   Sep. 10
2007ii   Sept. 4     0 33 34.05  + 0 59 05.7   21.0   0.27   Sept. 3
2007ij   Sept. 4    23 57 21.96  + 0 06 21.1   20.6   0.18   Sep. 11
2007ik   Sept. 5    22 38 53.72  - 1 10 01.5   20.9   0.18   Sep. 12


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                         (C) Copyright 2007 CBAT
2007 September 12                (CBET 1061)              Daniel W. E. Green