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IAUC 3891: 1983 VA; NEW X-RAY SOURCE

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IAUC number 

                                                  Circular No. 3891
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM     Telephone 617-864-5758


1983 VA
     K. S. Russell, U.K. Schmidt Telescope Unit, provides the
following additional positions.  The Nov. 3 positions (IAUC 3885)
were from a plate taken by J. Barrow.

         1983 UT             R.A.    (1950.0)    Decl.

         Nov. 11.47681      21 23 35.56      -56 27 54.6
              11.49764      21 23 29.52      -56 27 36.4

     The following orbital elements, by the undersigned, from the
observations Nov. 1-11, are uncertain but indicate that the object
is of Apollo type.  Further observations are urgently needed.

           T = 1983 Dec. 17.80 ET
       Peri. =  12.03                    e =   0.6375
       Node  =  77.24   1950.0           a =   2.2398 AU
       Incl. =  15.43                    n =   0.29404
           q =   0.8118 AU               P =   3.35 years

     1983 ET     R.A. (1950.0) Decl.      p        r      Mag.

     Nov. 20    20 30.16    -53 44.8
          22    20 14.62    -52 39.7    0.222    0.900    16.5
          24    19 57.76    -51 18.4
          26    19 39.63    -49 37.0    0.201    0.876    16.4
          28    19 20.38    -47 31.1
          30    19 00.29    -44 56.9    0.183    0.855    16.5
     Dec.  2    18 39.73    -41 51.3


NEW X-RAY SOURCE
     Y. Tanaka and the Tenma Team report that a new x-ray source,
located at R.A. = 3h31m05s +/- 12s, Decl. = +53deg00'6 +/- 3'0 (equinox
1950.0), was discovered from the x-ray satellite Tenma on Nov. 14.
There is no previously catalogued source within the error circle.  The
source is peculiar in that its intensity shows erratic short-term
variations, very similar to those of Cyg X-1, on timescales down
to 100 ms.  The average source intensity was constant at ~ 50 ufu
during Nov. 14-18.  The energy spectrum can be represented by a
power law with a photon index of ~ 0.6 and a cutoff above 20 keV.
The Hakucho satellite was due to take over observations after
Nov. 19.  Observers are urged to attempt to locate the source at
optical and radio wavelengths.


1983 November 21               (3891)              Brian G. Marsden

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