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IAUC 8509: 2005bh; 2005bb, 2005bf; V378 Ser

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IAUC number

                                                  Circular No. 8509
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

SUPERNOVA 2005bh IN UGC 6495
     Further to IAUC 8506, T. Puckett and L. Cox report the
discovery of an apparent supernova (mag 17.3) on an unfiltered CCD
frame taken with the 0.60-m automated supernova patrol telescope on
Apr. 10.10 UT.  The new object was confirmed (also at mag 17.3) on
CCD frames taken by M. BenDaniel, Observatorio del Teide, Canary
Islands, with the 'SLOOH' 0.35-m reflector on Apr. 10.91.  SN
2005bh is located at R.A. = 11h29m44s.00, Decl. = +22o07'39".1
(equinox 2000.0), which is 16".7 west and 3".7 north of the center
of UGC 6495.  Nothing is present at this location on images taken
by Puckett on 2002 Feb. 13 and 2003 Mar. 15 (limiting mag about

SUPERNOVAE 2005bb AND 2005bf
     N. Morrell, M. Hamuy, G. Folatelli, and C. Contreras, Carnegie
Supernova Project, report that spectroscopic observations (range
380-930 nm) of SN 2005bf (cf. IAUC 8507) and SN 2005bb (cf. IAUC
8504) were obtained on Apr. 7.08 and 7.23 UT, respectively, with
the Las Campanas 2.5-m du Pont telescope (+ WFCCD spectrograph).
SN 2005bf is a type-Ic supernova a few days before maximum light,
with very strong Si II 635.5-nm and a weak He I 587.6-nm P Cyg line,
among other features.  SN 2005bb is of type II, highly reddened,
with strong P-Cyg profiles in H_alpha and Ca II 857.9-nm, and weak
He I 587.6-nm.  The expansion velocity, derived from the minimum of
the H_alpha absorption, is 6000 km/s, assuming for the host galaxy
the recession velocity given in the NED database.
     M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian
Center for Astrophysics; and T. Matheson, National Optical
Astronomy Observatory, report that a spectrum (range 340-730 nm)
of SN 2005bf, obtained on Apr. 9.23 UT by H. Landt with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a
young type-Ic supernova with a blue continuum and relatively
shallow absorption lines.  The spectrum is similar to early spectra
of SN 1987M (Filippenko et al. 1990, A.J. 100, 1575).

     Visual magnitude estimates:  Apr. 4.148 UT, 11.7 (P. Schmeer,
Bischmisheim, Germany); 5.741, 11.6 (S. Yoshida, Ibaraki, Japan).

                      (C) Copyright 2005 CBAT
2005 April 10                  (8509)            Daniel W. E. Green

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