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IAUC 5886: X-RAY N IN Vel; 1993p; P/SCHWASSMANN-WACHMANN 1

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                                                  Circular No. 5886
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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
MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


X-RAY NOVA IN VELA
     K. Borozdin, R. Sunyaev and N. Alexandrovich, on behalf of
the Mir-Kvant-TTM team, report: "The x-ray nova
GRS 1009-45 (IAUC 5864, 5878) continues to be bright.  The flux on
Oct. 27 within the 2-6 keV spectral band was 530 mCrab (a 25 percent
decrease in four weeks).  The spectrum is soft and might be
approximated by a power law with photon spectral index -5.0 or black
body spectrum with kT = 0.56 keV.  Owing to the presence of Vela X-1 in the
same field TTM was able to localize the source to within a narrow strip
1.2 arcmin wide and 1.3 degree long with corners at R.A. = 10h10m.8,
Decl. = -45d43'.2; 10h10m.8, -45d42'.7; 10h12m.4, -44d26'.0 and 10h12m.5,
-44d26'.1 (equinox 1950.0).  By combining the Granat/WATCH and BATSE data
it is possible to reduce the strip's length by up to 0.5 deg."


COMET MUELLER (1993p)
     Ephemeris continuation from the orbital elements on MPC 22663:

1993/94     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Oct. 10     0 15.52    +43 10.8    1.844    2.702  142.0   13.1     12.1
     20    23 51.46    +38 13.3    1.716    2.583  143.1   13.4     11.8
     30    23 30.23    +31 56.5    1.635    2.462  137.8   15.7     11.5
Nov.  9    23 13.40    +24 50.8    1.602    2.341  127.5   19.6     11.2
     19    23 01.51    +17 36.1    1.613    2.219  114.9   23.8     11.0
     29    22 54.32    +10 47.1    1.658    2.096  101.8   27.4     10.8
Dec.  9    22 51.22    + 4 42.7    1.726    1.972   89.0   30.0     10.6
     19    22 51.53    - 0 32.3    1.803    1.848   76.9   31.2     10.4
     29    22 54.64    - 5 02.7    1.880    1.725   65.7   31.3     10.2
Jan.  8    23 00.02    - 8 57.3    1.946    1.603   55.2   30.3     10.0
     18    23 07.33    -12 26.1    1.994    1.484   45.6   28.3      9.7
     28    23 16.29    -15 38.7    2.018    1.368   37.1   25.7      9.4


PERIODIC COMET SCHWASSMANN-WACHMANN 1
     Total CCD magnitude estimates: Oct. 11.78 UT, 16.9 (A. Nakamura,
Kuma, Japan, 0.60-m reflector); 19.14, 15.6 (P. Pravec, Ondrejov
Observatory, 0.18-m reflector); 22.77, 15.3 (Nakamura); 23.68, 15.5
(T. Kojima, Chiyoda, Japan, 0.25-m Wright-Schmidt); 27.79, 13.3
(Nakamura); 31.63, 13.1 (Kojima); Nov. 1.61, 13.3 (Kojima).


1993 November 2                (5886)              Brian G. Marsden

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