[IAUC] CBET 1063: 20070912 : SUPERNOVAE 2007im-2007ip

Mie Sep 12 18:20:51 ART 2007

                                                  Electronic Telegram No. 1063
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVAE 2007im-2007ip
     The "Nearby Supernova Factory" collaboration (G. Aldering, C. Aragon,
S. Bongard, M. Childress, S. Loken, P. Nugent, S. Perlmutter, K. Runge,
R. C. Thomas, and B. A. Weaver, Lawrence Berkeley National Laboratory; C.
Baltay, A. Bauer, D. Rabinowitz, and R. Scalzo, Yale University; 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, S. Bailey, R. Pain, R. Pereira, and C. Wu,
Laboratoire de Physique Nucleaire et de Haute Energies de Paris; 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 four supernovae in images obtained using the QUEST-II camera on
the Palomar Oschin 1.2-m Schmidt telescope, operated by the Palomar-QUEST
Consortium.  Spectroscopy (range 320-1000 nm) obtained with the SuperNova
Integral Field Spectrograph on the University of Hawaii 2.2- telescope were
used to classify each.  A spectrum of 2007im obtained on Sept. 7.4 UT showed
it to be a few weeks past maximum.  A spectrum of 2007in obtained on Sept.
10.5 show it to be a week past maximum.  Spectra of 2007io and 2007ip
obtained on Sept. 12.5 showed both objects to be near maximum.  The R-band
discovery magnitudes astrometry tabulated below were derived from comparison
with the USNO-B1.0 catalogue.

SN       2007 UT       R.A. (2000.0) Decl.      Mag.    z      Type
2007im   Aug. 31.3   22 26 11.78  -12 08 09.7   19.2   0.07    Ia
2007in   Sep.  9.5    1 08 13.68  +18 44 27.0   19.4   0.06    Ia
2007io   Sep. 10.3    1 04 47.69  + 4 31 16.7   19.8   0.10    Ia
2007ip   Sep. 10.4    1 35 08.82  +36 01 04.8   19.7   0.09    Ia


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                         (C) Copyright 2007 CBAT
2007 September 12                (CBET 1063)              Daniel W. E. Green