Electronic Telegram No. 941
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVAE 2007bo-2007bz
     The "Nearby Supernova Factory" collaboration (P. Antilogus, J. Li,
R. Pain, R. Pereira, and C. Wu, Laboratoire de Physique Nucleaire et de
Haute Energies de Paris; C. Buton, Y. Copin, E. Gangler, and G. Smadja,
Institut de Physique Nucleaire de Lyon; 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; E. Pecontal and G. Rigaudier, Centre de Recherche
Astronomique de Lyon; R. Kessler, Kavli Institute for Cosmological
Physics, Chicago; and C. Baltay, A. Bauer, N. Ellman, D. Herrera, D.
Rabinowitz, and R. Scalzo, Yale University) reports the discovery of
twelve new supernovae in images obtained during Mar. 26-Apr. 22 UT with
the QUEST-II camera on the Palomar Oschin 1.2-m Schmidt telescope,
operated by the Palomar-QUEST Consortium (cf. CBETs 263, 768, 929).
Discovery positions and R-band magnitudes tabulated below were derived
from reductions with the USNO-A2.0 catalogue.  A subsequent spectrum of
each target (range 320-1000 nm), obtained with the SuperNova Integral
Field Spectrograph (SNIFS) on the University of Hawaii 2.2-m telescope,
was used for classification, and redshifts (z) are also listed below.

SN      2007 UT       R.A. (2000.0) Decl.      Mag.    z     Type
2007bo  Mar. 26.2   10 44 28.93  +23 50 10.7   19.6   0.04    II
2007bp  Mar. 26.4    9 24 00.55  + 5 12 25.0   15.6   0.03    II
2007bq  Apr.  3.5   15 47 04.71  - 6 43 38.1   18.8   0.03    II
2007br  Apr.  4.3   11 15 39.93  - 4 22 47.8   19.5   0.05    Ib
2007bs  Apr.  8.5    8 06 46.58  +22 24 46.0   19.8   0.14    IIn
2007bt  Apr. 17.5   14 27 47.73  +12 48 47.1   15.6   0.04    IIn
2007bu  Apr. 18.2   11 47 23.91  + 6 38 46.8   19.3   0.03    II
2007bv  Apr. 18.4   15 34 10.87  + 7 05 48.7   19.6   0.05    II
2007bw  Apr. 18.5   17 11 01.99  +24 30 36.4   17.3   0.14    IIn
2007bx  Apr. 19.3   11 02 41.52  - 1 38 31.5   18.6   0.02    II
2007by  Apr. 22.4   15 44 44.08  + 4 28 13.1   19.1   0.04    II
2007bz  Apr. 22.4   12 56 53.77  +22 22 22.1   16.7    ?      ?

SN 2007bp appears close to the galaxy MCG +01-24-19.  SN 2007bz, which
is located in IC 3918 (redshift 0.022, Van Driel et al. 2000, A.Ap.
Suppl. 144, 463; via NED) was not present to mag 20.5 on images from
Apr. 4.5 UT, and it was confirmed on an image obtained on Apr. 23.5
with the SNIFS.


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

                         (C) Copyright 2007 CBAT
2007 April 24                    (CBET 941)               Daniel W. E. Green