Electronic Telegram No. 580
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)
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SUPERNOVA 2006ds IN PGC 70011
     Y.-S. Tsai and K.-C. Liu, Kenting Star Village Observatory,
Hengchun, Taiwan, report the discovery of an apparent supernova
(mag about 16.1) on unfiltered CCD images taken with a 0.40-m
reflector on July 18.80 UT, with confirming images on July 19.82
showing the new object at mag about 15.6.  SN 2006ds is located
at R.A. = 22h55m18s.3, Decl. =  -33o55'17".5 (equinox 2000.0),
which is 5".4 west and 3".6 south of the nucleus of PGC 70011.
Nothing is visible at this location on a Digitized Sky Survey
image (limiting red mag 20.5).
     The "Nearby Supernova Factory" collaboration (P. Antilogus, S.
Gilles, R. Pain, and R. Pereira, Laboratoire de Physique Nucleaire
et de Haute Energies de Paris; N. Blanc, Y. Copin, E. Gangler, and
G. Smadja, Institut de Physique Nucleaire de Lyon; G. Aldering, C.
Aragon, S. Bailey, S. Bongard, M. J. Childress, D. Kocevski, S. Loken,
P. Nugent, S. Perlmutter, K. Runge, R. Scalzo, R. C. Thomas, L. Wang,
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, D. Herrera, and D. Rabinowitz, Yale University)
reports that a spectrum (range 320-1000 nm) of 2006ds, obtained on
July 20.5 UT with the Supernova Integral Field Spectrograph on the
University of Hawaii 2.2-m telescope, reveals that it is a type-II
supernova.  The spectrum exhibits H-alpha in net emission (full width
at continuum of 5000 km/s), other hydrogen Balmer P-Cyg features, and
P-Cygni He I 587.6-nm (7000 km/s maximum ejection velocity, measured
from the blue absorption edge).  The galaxy PGC 70011 is reported to
have z = 0.0293 (Ratcliffe et al. 1998, MNRAS 300, 417).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2006 CBAT
2006 July 20                     (CBET 580)               Daniel W. E. Green