Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 2817: TRANSIENT X-RAY SOURCES; 1974c; 1975e

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 2816 SEARCH Read IAUC 2818
IAUC number 

                                                  Circular No. 2817
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS


TRANSIENT X-RAY SOURCES
     G. Jernigan, Massachusetts Institute of Technology, reports
the following position, measured with the rotating modulation
collimators on SAS-3 on June 12 and 15, of the transient x-ray source
A1524-61 = TrA X-1: R.A. = 15h24m08s, Decl. = -61o42'.5 (equinox 1950.0).
This position, which has a 90-percent confidence error radius of
1'.5, lies 7'.5 from the position reported by Watson (IAUC 2808).
During the SAS-3 observations Cir X-1 was also in the field of view
of the modulation collimators, and the resultant position of that
object agrees with the Uhuru position within about 1'.  This lends
added confidence to the above position of A1524-61.  The intensity
of A1524-61 in the 1-10 keV energy range was found to be ~ 0.2
counts cm**-2 s**-1, which is consistent with the post flare intensity
reported by Holt (preprint).

     M. J. L. Turner, X-Ray Astronomy Group, University of Leicester,
reports that the right ascension of the x-ray source described
on IAUC 2814 is 6h21m, not 6h01m.  This source, now designated
A0621-00, had a brightness of 20 000 Uhuru flux units on Aug. 11.


COMET LOVAS (1974c)
     The following precise positions have been obtained by A. C.
Gilmore and P. M. Kilmartin at the Carter Observatory:

     1974 UT             R. A. (1950) Decl.        m2   Observer
     July  5.31667    12 09 27.83   -68 44 18.1          Gilmore
          12.39309    12 13 42.87   -68 34 20.0   14.9   Kilmartln


PERIODIC COMET SMIRNOVA-CHERNYKH (1975e)
     The following precise positions have been reported:

     1975 UT             R. A. (1950) Decl.        m1    Observer
     Apr.  6.49699     9 14 50.97   +23 49 47.9   15     Kojima
           6.54653     9 14 51.11   +23 49 44.6            "
          11.20694     9 15 14.68   +23 40 46.2          Krumenaker

N. Kojima (Ishiki, Aichi).  Measurer: T. Seki.  From Orient Astron.
   Assoc. Comet Bull. No. 104.
L. Krumenaker (Warner and Swasey Observatory, Nassau Station).


1975 August 13                 (2817)              Brian G. Marsden

Read IAUC 2816 SEARCH Read IAUC 2818

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!