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IAUC 5784: 1993N; 1993J, 3C 273, AND 3C 279; N Oph 1993; BL Lac

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                                                  Circular No. 5784
Central Bureau for Astronomical Telegrams
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505

     J. Mueller reports her discovery of an apparent supernova
located 6".7 west and 9".4 north of the nucleus of UGC 5695 (R.A. =
10h27m.1, Decl. = +13 16', equinox 1950.0).  The new object was
found at mag about 17.5 on a blue plate taken Apr. 15 by C. Brewer
and Mueller with the 1.2-m Oschin Schmidt Telescope in the course
of the second Palomar Sky Survey.
     E. Cappellaro and M. Della Valle, European Southern Observatory,
communicate:  "CCD frames obtained on May 6.1 UT at the 1.5-m
Danish telescope at La Silla confirm the presence of the new object
6".8 west and 9".8 north of the nucleus of UGC 5695.  Preliminary
photometry gives: V = 18.6, B-V = +0.5, V-R = +0.7."

SUPERNOVA 1993J, 3C 273, AND 3C 279
     E. I. Robson, Joint Astronomy Centre, Hilo, reports:  "The
James Clerk Maxwell Telescope has been observing SN 1993J since
outburst at a wavelength of 1.1 mm using the position given on IAUC
5752.  No detections have been obtained; the lowest level reached
was < 13.6 mJy (3 sigma) on Apr. 18 UT.  This was in general agreement
with the latest OVRO data on IAUC 5775, showing the decline in
flux to higher radio frequencies, and with the IRAM data of IAUC
5768.  All observing conditions have been excellent, and calibration
was done using Mars.  In terms of flux calibration, we note
that the blazars 3C 273 and 3C 279 are both currently flaring; 3C
273 has increased by a factor of 2 at 1.1 mm since the beginning of
1993, 3C 279 by 1.5 over the same period."

     Further photometry:  Apr. 24.63 UT, V = 9.82, B-V = +1.49 (W.
Allen, Adams Lane Observatory; cf. IAUC 5774); May 1.666, V = 11.85
+/- 0.02, U-B = -0.19 +/- 0.02, B-V = +0.84 +/- 0.00, V-R = +1.89
+/- 0.03, V-I = +1.83 +/- 0.06 (A. C. Gilmore, Mt. John University

     The following visual magnitude estimates have been reported
(cf. IAUC 5765):  1992 Dec. 29.70 UT, 15.6 (L. Szentasko, Budapest,
Hungary); 1993 Jan. 17.76, 15.1 (M. Verdenet, Bourbon Lancy, France);
Apr. 20.12, 13.5 (Verdenet); 24.11, 13.8 (Verdenet).

1993 May 6                     (5784)            Daniel W. E. Green

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