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IAUC 6748: S5 0716+71 AND PKS 0422+004; XTE J1739-302; 78P

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                                                 Circular No. 6748
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/iau/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)


S5 0716+71 AND PKS 0422+004
     G. Tosti, Cattedra di Astrofisica, Universita di Perugia,
reports:  "Observations with the 0.4-m Robotic Telescope at the
Perugia University Observatory (Tosti et al. 1996, PASP 108, 706)
show both S5 0716+71 (Kuhr et al. 1981, A.J. 86, 854) and
PKS 0422+004 to be in a major outburst with Cousins R Cousins
magnitudes as follows:  S5 0716+71, Sept. 9 UT, 12.99 +/- 0.05;
10, 13.12 +/- 0.04; 18, 12.69 +/- 0.03; 19, 12.58 +/- 0.03.
PKS 0422+004, Sept. 10, 13.46 +/- 0.04; 18, 13.34 +/- 0.04; 19,
13.42 +/- 0.04; 20, 13.30 +/- 0.04.  The brightness of S5 0716+71
increased by more than 1 mag with respect to the mean value
observed during the last three years (R = 13.9).  The magnitudes of
PKS 0422+004 are very close to those observed at the peak of the
Nov. 1994 historic maximum (R = 13.2; V = 13.65; e.g., IAUC 6106;
Massaro et al. 1996, A.Ap. 314, 87).  Further observations are
encouraged at all wavelengths."


XTE J1739-302
     D. M. Smith and D. Main, Space Sciences Laboratory, University
of California at Berkeley; F. Marshall and J. Swank, Goddard Space
Flight Center, NASA; W. Heindl, University of California at San
Diego; and M. Leventhal, University of Maryland, College Park,
report:  "The RXTE Proportional Counter Array detected a new x-ray
transient on Aug. 12.60 and 12.72 UT during slews across the
galactic-center region.  It was not seen on Aug. 3, 14, 20, or 28.
The position is R.A. = 17h38m59s, Decl. = -30o08'.4 (equinox
2000.0; 3' error radius at 99-percent confidence).  The 2-20-keV
flux was 70 mCrab, and the spectrum could be fit with a hard
(photon index -1.6) power law plus a 4-keV disk blackbody.  The rms
variability was 13 percent from 0.005 to 10 Hz.  The power spectrum
showed no flattening at low frequencies and no pulsations in this
range.  Although it is no longer bright in x-rays, prompt
observations, particularly in the radio, are encouraged."


COMET 78P/GEHRELS 2
     Visual m_1 estimates: Aug. 30.09 UT, 12.8 (J. Carvajal, Avila,
Spain, 0.32-m reflector); Sept. 1.11, 11.9 (K. Hornoch, Lelekovice,
Czech Republic, 0.35-m refl.); 11.10, 12.4 (R. J. Bouma, Groningen,
The Netherlands, 0.25-m refl.); 12.06, 12.2 (M. Meyer, Frauenstein,
Germany, 0.25-m reflector).

                      (C) Copyright 1997 CBAT
1997 September 26              (6748)            Daniel W. E. Green

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