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IAUC 6766: 1997do; AO 0235+164; C/1997 J2

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                                                 Circular No. 6766
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
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SUPERNOVA 1997do IN UGC 3845
     Y. L. Qiu, Q. Y. Qiao, W. D. Li, and J. Y. Hu, Beijing
Astronomical Observatory (BAO); and A. Esamdin, Urumqi Astronomical
Station, on behalf of the BAO supernova survey, report their
discovery of a supernova found on unfiltered CCD images with the
BAO 0.6-m reflector on Oct. 31 UT.  Measured R magnitudes:  Oct.
31.84, 15.8; Nov. 1.67, 15.6.  The supernova is located at R.A. =
7h26m42s.50, Decl. = +47o05'36".0 (equinox 2000.0), which is 2".6
west and 3".8 south of the center of UGC 3845.  Unfiltered CCD
images of the same field taken on Oct. 25 (limiting mag about 18.5)
show no star at the position of the supernova.  A low-dispersion
spectrum, taken on Nov. 1.80 by Qiu, Esamdin, and K. L. Huang
(Nanjing Normal University) with the 2.16-m telescope at Xinglong
Station, shows this to be a type-Ia supernova before maximum.  The
spectrum displays a strong Si II 615-nm absorption feature.  The
spectrum is similar to that of SN 1990N, one week before maximum.
The recession velocity, derived from the narrow H-alpha emission
line, is 3240 km/s.

AO 0235+164
     J. Webb and E. Howard, Florida International University and
the SARA Observatory; and T. Balonek, Foggy Bottom Observatory
(FBO), Colgate University, report: "This BL Lac object is currently
undergoing a period of optical activity.  CCD observations with the
SARA 0.9-m telescope at Kitt Peak and the FBO 0.4-m telescope
indicate that it has brightened by 0.9 mag in four days.
Preliminary R magnitudes documenting its activity are:  Oct. 2.24
UT, 17.34 +/- 0.07; 12.27, 17.67 +/- 0.10; 20.29, 17.16 +/- 0.07;
21.29, 17.51 +/- 0.04; 23.31, 17.12 +/- 0.05; 25.24, 16.62 +/-
0.04; 26.17, 16.56 +/- 0.03; 29.12, 16.45 +/- 0.05; 30.28, 15.99
+/- 0.10.  The source was typically fainter than mag 18.0 during
the past few years.  Previous outbursts have exhibited large-
amplitude rapid flaring at optical wavelengths, and possible
correlated activity with other wavelengths.  Further observations
of this blazar are encouraged at all wavelengths."

     Total visual magnitude estimates:  Sept. 28.83 UT, 11.6 (R. J.
Bouma, Groningen, The Netherlands, 0.25-m reflector); Oct. 6.78,
11.9 (M. Plsek, Lelekovice, Czech Republic, 0.35-m reflector);
11.88, 11.5 (J. M. Trigo, Benicossim, Castellon, Spain, 0.17-m
reflector); 20.82, 11.2 (G. Comello, Roden, The Netherlands,
0.30-m reflector); 31.77, 11.5 (Bouma).

                      (C) Copyright 1997 CBAT
1997 November 1                (6766)            Daniel W. E. Green

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