[IAUC] CBET 1054: 20070906 : SUPERNOVAE 2007hq, 2007hr, 2007hs, 2007ht
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Electronic Telegram No. 1054
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 2007hq, 2007hr, 2007hs, 2007ht
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, S. Bailey, R. Pain, R. Pereira, and C. Wu, Laboratoire de
Physique Nucleaire et de Haute Energies de Paris; 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,
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 four supernovae in images obtained using
the QUEST-II camera on the Palomar 1.2-m Schmidt telescope, operated by
the Palomar-QUEST Consortium. SN 2007hr was not detected on an image
taken on Aug. 20, and 2007hs was not detected on an image taken on Aug. 9
(no limiting-magnitude information was provided). Spectra (range 320-1000
nm), obtained during Sept. 5.3-5.6 UT with the SuperNova Integral Field
Spectrograph on the University of Hawaii 2.2-m telescope, show that 2007hq
is about one week past maximum and 2007ht is 1-2 weeks past maximum.
The R-band discovery magnitudes and astrometry tabulated below were
derived from comparison with the USNO-B1.0 catalogue.
SN 2007 UT R.A. (2000.0) Decl. Mag. z Type
2007hq Sept. 1.3 0 10 06.68 -16 16 24.3 19.7 0.09 Ia
2007hr Sept. 1.5 4 12 07.14 - 7 35 13.2 18.6 0.03 II
2007hs Sept. 2.2 17 11 40.31 +36 30 03.7 19.4 0.07 II
2007ht Sept. 2.3 0 34 33.81 - 1 13 03.1 19.2 0.07 Ia
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2007 CBAT
2007 September 6 (CBET 1054) Daniel W. E. Green
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