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IAUC 7849: 2001jy, 2001jz, 2001ka, 2001kb, 2001kc, 2001kd; 2002bo

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                                                  Circular No. 7849
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 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://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


SUPERNOVAE 2001jy, 2001jz, 2001ka, 2001kb, 2001kc, 2001kd
     B. Barris, University of Hawaii, on behalf of the High-Z
Supernova Search Team (cf. IAUC 7801 and references therein),
reports the discovery of several apparent supernovae on I-band
images taken in late 2001 (cf. IAUC 7802, 7805, 7806, and above
citations), each of which has now faded from view.  The host-galaxy
emission for SN 2001jy and SN 2001kd yields z = 0.18 and 0.937,
respectively.  Each apparent supernova is within 2" of its host
galaxy's center.  None of the apparent supernovae are present in
images taken on 2002 Feb. 17 (limiting mag I = 25.8) with the
Subaru telescope (+ SUPRIME) by K. Chambers and M. Liu.  The I_1
magnitudes below are for the discovery date; the I_2 magnitudes are
from observations made on 2001 Sept. 24, Oct. 9, 16, Nov. 12, 18,
and 18 (respectively).

SN       2001 UT      R.A. (2000.0) Decl.      I_1    I_2
2001jy   Sept.12    4 38 54.67  - 1 20 02.8    21.5   21.5
2001jz   Sept.24    4 39 20.82  - 1 37 48.0    23.9   23.3
2001ka   Oct.  9    8 49 07.94  +44 10 00.2    21.6   22.0
2001kb   Oct. 22    4 39 12.42  - 1 21 24.1    24.5   24.8
2001kc   Nov. 12    7 50 01.97  +10 19 38.7    24.4   24.9
2001kd   Nov. 12    7 50 31.24  +10 21 07.3    24.3   24.5


SUPERNOVA 2002bo IN NGC 3190
     T. Matheson, S. Jha, P. Challis, and R. Kirshner, Center for
Astrophysics, report that a spectrum (range 370-750 nm) of SN
2002bo, obtained by V. Hradecky on Mar. 10.25 UT with the Mt.
Hopkins 1.5-m telescope (+ FAST), shows it to be a reddened and
possibly peculiar type-Ia supernova well before maximum.  Adopting
the NED recession velocity of 1271 km/s for the host galaxy, the
supernova expansion velocity is about 17 900 km/s for Si II (rest
635.5 nm).  This expansion velocity implies an age of approximately
2 weeks before maximum, based upon comparison with values presented
by Jha et al. (1999, Ap.J. Supp. 125, 73).  The spectrum shows
strong, narrow Na I D absorptions at the velocity of the host
galaxy (0.3 nm EW).  The Schlegel et al. (1998, Ap.J. 500, 525)
dust maps indicate a Galactic reddening of E(B-V) = 0.025.  Several
titanium absorption features appear stronger than usual, indicating
that this may be a subluminous event similar to SN 1999by (see
Garnavich et al. 2002, Ap.J., in press,
http://xxx.lanl.gov/abs/astro-ph/?0105490).

                      (C) Copyright 2002 CBAT
2002 March 11                  (7849)            Daniel W. E. Green

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