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IAUC 4583: TRANSIENT X-RAY SOURCE; 1988e; 1988a

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IAUC number 

                                                  Circular No. 4583
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 617-495-7244/7440/7444
MARSDEN or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


TRANSIENT X-RAY SOURCE
     F. Makino and the Ginga Team, Sagamihara, Kanagawa, report:
"Ginga discovered a new transient source on Apr. 3 at R.A. = 18h40m
+/- 1m, Decl. = +0.8 +/- 0.1 deg (equinox 1950.0).  The intensity was
about 50 mCrab and was at the same level during monitoring on Apr. 10
and 19.  The x-ray spectrum is hard and resembles that of an x-ray
binary pulsar.  Coherent pulsation search is underway."


COMET LEVY (1988e)
     Improved parabolic orbital elements from MPC 13041:

     T = 1987 Nov. 29.870 ET          Peri. = 326.864
                                      Node  = 288.138   1950.0
     q = 1.18187 AU                   Incl. =  62.821

     1988 ET      R.A. (1950) Decl.     Delta      r       m1
     Apr. 19    22 09.07    +30 37.4
          29    22 18.50    +35 03.6    2.851    2.479    12.7
     May   9    22 26.37    +39 23.1
          19    22 32.42    +43 34.6    2.920    2.702    13.1
          29    22 36.29    +47 35.9
     June  8    22 37.57    +51 24.5    2.994    2.922    13.5
          18    22 35.72    +54 57.3
          28    22 30.18    +58 09.9    3.076    3.141    13.9
     July  8    22 20.47    +60 57.4
          18    22 06.37    +63 14.1    3.174    3.356    14.3

     Total visual magnitude estimates by D. Levy, Tucson, AZ:
Apr. 9.46 UT, 12.3 (Catalina 1.54-m reflector); 19.47, 12.6
(0.4-m reflector); 20.46, 12.7 (0.4-m reflector).


COMET LILLER (1988a)
     Further total visual magnitude estimates: Apr. 14.81 UT, 5.0 (M. V.
Zanotta, Milan, Italy, 10 x 50 binoculars; tail 1 deg in p.a. 340
deg); 17.04, 5.9 (G. R. Chester, Rixeyville, VA, 7 x 50 binoculars;
tail 1 deg in p.a. 350 deg); 18.46, 5.7 (A. Hale, Las Cruces, NM,
10 x 50 binoculars; 40' tail in p.a. 350 deg); 18.82, 5.0 (Zanotta,
1 deg tail in p.a. 355 deg); 21.47, 4.7 (Levy, 0.15-m reflector;
3 deg tail in p.a. about 20 deg); 22.04, 5.5 (D. W. E. Green,
Cambridge, MA, 20 x 80 binoculars).


1988 April 22                  (4583)              Brian G. Marsden

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