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IAUC 6183: GRO J1629-49; 4C 38.41; TIME ADJUSTMENT ON 1995 Dec. 31

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IAUC number 

                                                  Circular No. 6183
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
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)
Phone 617-495-7244/7440/7444 (for emergency use only)


GRO J1629-49
     R. H. McNaught, Anglo-Australian Observatory, reports that he
and G. J. Garradd obtained unfiltered CCD images around July 6.6 UT
with the 1.0-m telescope at Siding Spring, covering 1.2 deg**2
around the EGRET position reported on IAUC 6182.  Examination of
the close vicinity of PMN J1628-4936 indicates the presence of a
new source of mag about 18.0 at R.A. = 16h28m57s.86, Decl. =
-49o36'53".4 (equinox 2000.0; uncertainty 0".1 in each coordinate,
based on 14 GSC stars).  A star of mag about 19.5 is offset from
the suspect by about 2" in p.a. 300o and a star of mag about 17.5
has end figures 57s.79, 58".9.  No image appears in this position
on the ESO R or B or the SERC J surveys.
     Further to IAUC 6182, G. Kanbach adds that the source was
detected in observations made during 1995 June 24-July 2.
     Corrigendum.  On IAUC 6182, line 8, for  Parkes-Molonglo-NRAO
read  Parkes-MIT-NRAO.


4C 38.41
     S. Bosio, G. De Francesco, G. Ghisellini, G. Latini, C. M.
Raiteri, and M. Villata, Torino Observatory, report: "The gamma-ray
blazar 4C 38.41 (1633+382) underwent a major optical flare,
reaching its historical maximum.  Magnitudes in the R (Cousins) and
B (Johnson) bands obtained with the Pino Torinese 1.05-m telescope
(+ CCD camera) are:  May 24.02 UT, R = 17.18 +/- 0.02; June 6.01,
16.93 +/- 0.02; 19.01, 16.70 +/- 0.04; 20.95, 16.91 +/- 0.04;
27.95, 14.96 +/- 0.02; 28.00, 14.96 +/- 0.02; 28.88, 16.04 +/-
0.02; 29.92, 16.26 +/- 0.02; July 4.98, 16.26 +/- 0.02; June 28.91,
B = 16.98 +/- 0.04; 29.89, 17.13 +/- 0.03.  Follow-up observations
at other (especially radio) bands are encouraged."


TIME ADJUSTMENT ON 1995 DECEMBER 31
     Bulletin C10 of the International Earth Rotation Service
announces that a positive leap second will be introduced such that
the sequence of UTC second markers will be:  1995 December
31d23h59m59s, 31d23h59m60s, 1996 January 1d00h00m00s.  Beginning
1996 January 1, the difference UTC-TAI = -30s.


1995 July 6                    (6183)            Daniel W. E. Green

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