Central Bureau for Astronomical Telegrams

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IAUC 7701: 1996cl, 1996cp,, 1996cq; 2001bf; 2001dw; 19P

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                                                  Circular No. 7701
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 1996cl, 1996cp, AND 1996cq
     Further to IAUC 7700, Gal-Yam et al. write:  "A comparison of
HST images of the galaxy cluster MS 1054.4-0321 (z = 0.83) obtained
during 1996 Mar. 13 (total exposure 18 200 s through the F814W
filter) with later images obtained during 1998 May 29 (total
exposure 6600 s, same filter) reveals two new sources.  SN 1996cp
at R.A. = 10h57m03s.5, Decl. = -3 37'41" (equinox 2000.0) is
detected at magnitude [I814] = 26.5 (equivalent to Cousins I =
26.2) and is located at the same declination and 0".9 east of an
unidentified host galaxy.  SN 1996cq (at R.A. = 10h57m02s.2, Decl.
= -3 37'34") is detected at [I814] = 26.0 (equivalent to Cousins I
= 25.7).  A very faint fuzz near the image detection limit may be
associated with the host galaxy of this object.  Both sources are
absent from the 1998 data (limiting I814 mag at least 27.7).  Both
new objects have stellar PSFs at the HST resolution limit and
appear on six individual sub-exposures obtained over a period of
10.5 hr.  We estimate an upper limit of 0".12/day on any motion of
these sources.  We note that the comparison of the 1996 images of
this cluster with the 1998 data also clearly shows SN 1996cl (IAUC
6621), 0".05 west and 0".1 south of its host galaxy's nucleus; SN
1996cl appears at [I814] = 23.8 (equivalent to Johnson-Cousins I =
23.5), consistent with the magnitude reported by Perlmutter et al.
(1998, Ap.J. 517, 565)."


SUPERNOVA 2001bf IN MCG +04-42-22
     R. Chornock, A. V. Filippenko, and W. D. Li, University of
California at Berkeley, write:  "Inspection of CCD spectra (range
330-1000 nm), obtained on July 27 UT with the Shane 3-m reflector
at Lick Observatory, reveals that SN 2001bf (IAUC 7620) is of type
Ia (as suggested on IAUC 7625), not Ic (IAUC 7636).  Our
classification is supported by the spectrum obtained by the CfA group
(http://cfa-www.harvard.edu/cfa/oir/Research/supernova/spectra/)."


SUPERNOVA 2001dw IN NGC 1168
     Corrigendum.  On IAUC 7691, line 6, FOR  13" west and 9".5
south  READ 13" east and 9".5 north


COMET 19P/BORRELLY
     Visual m_1 estimates by N. Biver:  Aug. 12.12 UT, 11.1 (Ablis,
France, 0.26-m refl.); 18.13, 10.7; 26.13, 10.4 (Noordwijk,
Netherlands, 0.20-m refl.).

                      (C) Copyright 2001 CBAT
2001 August 30                 (7701)            Daniel W. E. Green

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