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IAUC 6622: 1997 G1; 1997bp; 1997bq

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                                                 Circular No. 6622
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)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/cfa/ps/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET 1997 G1
    Joe Montani, Lunar and Planetary Laboratory, reports the
discovery of a comet with the Spacewatch 0.9-m telescope at Kitt
Peak.  J. Larsen assisted with the observations on Apr. 9.  The
measurements below are by Montani (Apr. 9, showing a tail extending
for 2' from the coma in p.a. 285 deg) and by J. V. Scotti (Apr. 10,
coma diameter 10", tail extending 1'.3 in p.a. 284 deg).  On Apr.
10.122 UT, m2 = 21.4.

     1997 UT             R.A. (2000) Decl.        m1
     Apr.  9.13872    7 16 09.59   +19 59 45.7   19.1
           9.14671    7 16 09.91   +19 59 44.9   19.1
           9.16504    7 16 10.53   +19 59 44.0   19.0
          10.12171    7 16 44.12   +19 58 42.3
          10.13250    7 16 44.49   +19 58 41.4   19.9
          10.13897    7 16 44.76   +19 58 41.7   19.4


SUPERNOVA 1997bp IN NGC 4680
   L. Wang and J. C. Wheeler, University of Texas, communicate:
"Spectropolarimetry of SN 1997bp was obtained on Apr. 7.2 UT with
the 2.7-m telescope (+ SPOL) at McDonald Observatory.  Preliminary
reduction of the data (total exposure 4 hr) indicates polarization
variation at a level of > 0.5 percent across the strong Si II
635.5-nm feature.  Such a variation is indicative of intrinsic
polarization of the supernova.  More observations, particularly
polarimetry, are strongly incouraged.  For comparison, our data on
SN 1997bp can be accessed at http://tycho.as.utexas.edu/~lifan, or
by e-mail to lifan@astro.as.utexas.edu."


SUPERNOVA 1997bq IN NGC 3147
     W.-d. Li, Beijing Astronomical Observatory (BAO), reports that
an observation of NGC 3147 on Mar. 27 shows no object at the
location of SN 1997bq (cf. IAUC 6616) to a limiting mag of 18.5.
On Apr. 3, and unfiltered CCD frame shows the supernova at mag
about 18.0.  On Apr. 9, photometric observations with the BAO 0.6-m
reflector yield the following magnitudes for SN 1997bq (calibration
stars from M67):  B = 15.64 +/- 0.04, V = 15.49 +/- 0.03, R = 14.84
+/- 0.03.

                      (C) Copyright 1997 CBAT
1997 April 10                  (6622)            Daniel W. E. Green

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