[IAUC] CBET 996: 20070710 : SUPERNOVAE 2007fd-2007fn

[IAUC mailing list]

                                                  Electronic Telegram No. 996
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVAE 2007fd-2007fn
     The "Nearby Supernova Factory" collaboration (C. Buton, Y. Copin,
E. Gangler, and G. Smadja, 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; C. Baltay, A. Bauer, D. Rabinowitz, and R. Scalzo, Yale
University; G. Rigaudier and E. Pecontal, Centre de Recherche
Astronomique de Lyon; D. Birchall, Institute for Astronomy, University
of Hawaii, Hilo; and J. Holtzman, New Mexico State University, Las
Cruces) reports the discovery of eleven supernovae in images obtained
during June 30-July 8 UT using the QUEST-II camera on the Palomar
Oschin 1.2-m telescope, operated by the Palomar-QUEST Consortium.
Spectra (range 320-1000 nm) obtained with the SuperNova Integral Field
Spectrograph on the University of Hawaii 2.2-m telescope during July
4-9 were used to classify each new object.  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
2007fd   June 30.2   14 16 19.03  +36 13 01.3   19.5   0.07    Ia
2007fe   June 30.2   14 25 56.09  +46 26 56.9   18.7   0.03    II
2007ff   June 30.5    1 24 10.24  + 9 00 40.5   19.8   0.05    Ib/c
2007fg   July  3.2   14 07 36.67  +38 40 49.3   18.1   0.03    II
2007fh   July  3.4   22 16 41.64  +21 18 58.9   19.2   0.08    Ia
2007fi   July  5.3   15 44 16.87  +34 43 13.7   19.7   0.12    Ia
2007fj   July  6.4   22 14 25.37  -28 11 53.9   18.8   0.06    Ib/c
2007fk   July  8.3   15 50 35.90  +43 46 32.9   19.6   0.04    IIn
2007fl   July  8.5    1 09 56.61  - 3 31 35.6   19.5   0.05    II
2007fm   July  8.5    1 11 26.42  - 2 41 16.8   19.9   0.06    II
2007fn   July  8.5    2 29 28.36  +31 28 33.0   18.0   0.02    Ib/c

A spectrogram from July 7.3 UT shows 2007fd to be 3-4 weeks after maximum.
A spectrogram from July 4.4 shows 2007fh to be about one week after
maximum.  A spectrogram from July 9.3 shows 2007fi to be at maximum.
A spectrogram taken of 2007fn in UGC 1963 (z = 0.017 from de Vaucouleurs
et al. 1991, Third Reference Catalogue of Bright Galaxies) on July 9.6
shows that it is similar to the spectrum of SN 2000H about 1 month after
maximum.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2007 CBAT
2007 July 10                     (CBET 996)               Daniel W. E. Green