[IAUC] CBET 1043: 20070828 : SUPERNOVAE 2007gx, 2007gy, 2007gz, 2007ha, 2007hb, 2007hc

Mar Ago 28 02:00:21 ART 2007

                                                  Electronic Telegram No. 1043
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 2007gx, 2007gy, 2007gz, 2007ha, 2007hb, 2007hc
     The "Nearby Supernova Factory" collaboration (G. Rigaudier and E.
Pecontal, Centre de Recherche Astronomique de Lyon; C. Buton, Y. Copin,
E. Gangler, G. Smadja, and C. Tao, Institut de Physique Nucleaire de Lyon;
P. Antilogus, R. Pain, R. Pereira, and C. Wu, Laboratoire de Physique
Nucleaire et de Haute Energies de Paris; G. Aldering, C. Aragon, S. Bailey,
S. Bongard, M. Childress, S. Loken, P. Nugent, S. Perlmutter, K. Runge,
R. C. Thomas, and B. A. Weaver, Lawrence Berkeley National Laboratory,
Berkeley; C. Baltay, A. Bauer, D. Rabinowitz, and R. Scalzo, Yale
University; D. Birchall, Institute for Astronomy, University of Hawaii,
Hilo; and J. Cough and J. Holtzman, New Mexico State University, Las
Cruces) reports the discovery of six supernovae in images obtained using
the QUEST-II camera on the Palomar Oschin 1.2-m Schmidt telescope, operated
by the Palomar-QUEST Consortium.  Spectra (range 320-1000 nm) were obtained
for 2007gy, 2007gz, and 2007ha on Aug. 23.5 UT with the SuperNova Integral
Field Spectrograph on the University of Hawaii 2.2-m telescope, yielding
the spectral types and redshifts tabulated below; 2007ha was near maximum.
Spectroscopy on Aug. 11.3 showed the spectrum of 2007gx to be similar to
that of SN 1998bw.  Spectra of 2007hb and 2007hc (which were not detected
in images from Aug. 8 and 12, respectively) were obtained on Aug. 26.5.
R-band discovery magnitudes and astrometry were derived from comparison
with the USNO-B1.0 catalogue.

SN       2007 UT       R.A. (2000.0) Decl.      Mag.    z      Type
2007gx   Aug.  9.2   17 18 51.49  +22 47 16.6   19.9   0.08    Ic
2007gy   Aug. 19.3   23 51 13.57  +11 25 18.9   18.5   0.04    IIn
2007gz   Aug. 20.2   22 48 02.47  +23 15 17.8   19.6   0.05    II
2007ha   Aug. 20.5    0 46 01.79  -23 14 14.4   19.8   0.17    Ia
2007hb   Aug. 24.4    2 08 34.02  +29 14 14.3   19.5   0.02    Ib/c
2007hc   Aug. 24.5    0 35 58.01  +24 02 13.4   17.3   0.02    II


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                         (C) Copyright 2007 CBAT
2007 August 28                   (CBET 1043)              Daniel W. E. Green