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IAUC 6773: 1997dr; 1997ds; EF Peg; C/1997 T1

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                                                 Circular No. 6773
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
Phone 617-495-7244/7440/7444 (for emergency use only)

     The Mount Stromlo Abell Cluster Supernova Search Team (cf.
IAUC 6639) reports the discovery of an apparent supernova (R = V =
18.7) on V and R CCD images taken on Nov. 7 by S. Chan at the Mount
Stromlo 1.27-m telescope (+ Macho Camera).  SN 1997dr is located
near Abell 3112 at R.A. = 3h18m49s.21, Decl. = -44o28'13".4
(equinox 2000.0), only 0".5 north and 0".2 east of its host galaxy.
A nearby star has position end figures 55s.51, 28".3.  SN 1997dr
was not visible on similar images taken on Oct. 17 (limiting mag R
= 21), but is present in V and R images taken at the Mount Stromlo
0.76-m telescope on Nov. 17, when it appears 0.2 mag brighter.
Finding charts are available, as usual, at
http://msowww.anu.edu.au/~reiss/Abell_SNSearch/.  N. Suntzeff
reports that images obtained on Nov. 17 UT with the Cerro Tololo
0.9-m telescope show that photometric identification is difficult
due to the supernova's proximity to the galaxy nucleus.

SUPERNOVA 1997ds IN MCG -01-57-007
     Y. L. Qiu, Q. Y. Qiao, W. D. Li, and J. Y. Hu, Beijing
Astronomical Observatory (BAO); and A. Esamdin, Urumqi Astronomical
Station, report their discovery of an apparent supernova (mag about
16.3) on unfiltered CCD images taken with a 0.6-m telescope on Nov.
19.49 UT.  SN 1997ds is located at R.A. = 22h24m11s.51, Decl. =
-3 29'10".5 (equinox 2000.0), which is 0".9 west and 14".2 south of
the center of MCG -01-57-007.  The supernova was confirmed on
images taken on Nov. 17.47 (mag about 16.2).  Unfiltered CCD images
of the same field taken on Nov. 4 show no star at this location.

     Visual magnitude estimates by P. Schmeer, Bischmisheim,
Germany (cf. IAUC 6767):  Nov. 3.735 UT, 10.9; 3.883, 11.0; 7.753,
11.4; 8.728, 11.8; 9.765, 11.9; 13.734, 12.4.
     Corrigendum.  On IAUC 6767, last line, for  p.a. 305 deg.
read   p.a. 112 deg.

     Visual m_1 estimates:  Nov. 1.03 UT, 10.3 (G. W. Kronk, Troy,
IL, 0.33-m reflector); 6.85, 9.9 (A. Pereira, Cabo da Roca,
Portugal, 0.25-m reflector); 18.98, 9.9 (J. E. Bortle, Stormville,
NY, 0.41-m reflector); 19.74, 10.4 (R. J. Bouma, Groningen, The
Netherlands, 0.25-m reflector).

                      (C) Copyright 1997 CBAT
1997 November 19               (6773)            Daniel W. E. Green

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