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IAUC 3021: SN IN NGC 977; ENHANCED gamma-RAY EMISSION; 1975j; P/SCHWASSMANN-WACHMANN 1; P/ASHBROOK-JACKSON

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                                                  Circular No. 3021
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     Telex: 921428
Telephone: (617) 864-5758


SUPERNOVA IN NGC 977
     L. Rosino, Asiago Astrophysical Observatory, reports the
discovery of a supernova 5" west and 16" south of the nucleus of NGC
977.  On Dec. 15.903 UT the photographic magnitude was 15.5.


ENHANCED gamma-RAY EMISSION
     R. D. Wills, ESTEC, Noordwijk, communicates the following report
by the Caravane Collaboration: "The European Space Agency's
satellite COS B has detected enhanced emission of high-energy gamma
radiation from the directions l = 98o +/- 2o, b = 0o +/- 2o and l = 110o
+/- 2o, b = +5o +/- 4o, consistent with localized sources of intensity ~
3 x 10**-6 ph cm**-2 s**-1 above 70 MeV.  The observation of a field
about 20o in radius centered on l = 101o, b = 0o started on Dec. 10
and is planned to continue until about 1977 Jan. 16.  Examination
of earlier data shows that the source at l = 98o was not detected
in Dec. 1975.  The location of the source reported on IAUC 2992 has
been refined to l = 136o.5 +/- 0o.5, b = +1o.5 +/- 0o.5."


COMET MORI-SATO-FUJIKAWA (1975j)
     The following precise positions have been reported:

     1976 UT             R. A. (1950) Decl.        m2    Observer
     Mar. 27.41071    23 36 35.68   -58 42 06.1          Torres
          28.36930    23 36 34.37   -58 40 37.2            "
     Aug. 22.33822    17 13 05.94   -47 38 16.5   16     Gilmore
     Sept.18.40139    17 18 14.57   -40 29 10.8   16.9     "

C. Torres (University of Chile, Cerro El Roble Station).  Mar. 28:
   narrow, fanshaped tail extending 3' to south-southeast.
A. C. Gilmore (Carter Observatory).  Measurer: P. M. Kilmartin.


PERIODIC COMET SCHWASSMANN-WACHMANN 1
     The following precise positions, by K. Suzuki, JCPM Oi Station,
are from Nihondaira Obs. Circ. No. 806.  Measurer: T. Urata.

     1976 UT             R. A. (1950) Decl.         m1
     Oct. 29.61910     3 13 24.89   +29 23 36.8    10
          29.63750     3 13 24.37   +29 23 38.4
          30.60781     3 12 54.84   +29 22 20.0    10
          31.81389     3 12 17.71   +29 20 37.5    10
     Nov.  1.74653     3 11 48.95   +29 19 19.4    10

     K. Tomita, Tokyo Astronomical Observatory, writes that the
comet was observed at magnitude 18.0 on Oct. 22.70 UT but had
brightened to magnitude 10.0-10.5 on Oct. 25.71.  J. Bortle, Brooks
Observatory, remarks that the comet is still bright and has probably
experienced further small outbursts; his recent total visual
magnitudes estimates, made with a 32-cm reflector, are: Dec. 14.00
UT, 12.1; 14.99, 12.3; 16.06, 12.3; 19.00, 12.4; 20.00, 12.6.


PERIODIC COMET ASHBROOK-JACKSON
     Ephemeris from Handb. Br. Astron. Assoc. for 1977:
                                                        For dT = +1d
     1977 ET     R. A. (1950) Decl.     Delta     r     dR.A.  dDecl.   m2
     Feb.  6    16 01.70    -29 52.2    4.175   3.993   -0m50  + 2'0   20.6
          16    16 09.23    -30 41.4                    -0.53  + 2.0
          26    16 15.58    -31 29.5    3.810   3.925   -0.57  + 2.0   20.3
     Mar.  8    16 20.50    -32 16.5                    -0.61  + 2.1
          18    16 23.78    -33 02.2    3.447   3.857   -0.65  + 2.2   23.0
          28    16 25.16    -33 46.0                    -0.70  + 2.3
     Apr.  7    16 24.48    -34 26.8    3.114   3.786   -0.74  + 2.4   19.7
          17    16 21.62    -35 03.0                    -0.78  + 2.7
          27    16 16.60    -35 32.2    2.844   3.715   -0.82  + 3.0   19.5
     May   7    16 09.68    -35 52.0                    -0.84  + 3.3
          17    16 01.31    -36 00.4    2.667   3.642   -0.85  + 3.6   19.2
          27    15 52.18    -35 56.1                    -0.85  + 4.0
     June  6    15 43.12    -35 39.7    2.599   3.568   -0.83  + 4.2   19.1
          16    15 34.94    -35 13.5                    -0.80  + 4.4
          26    15 28.33    -34 41.1    2.638   3.494   -0.76  + 4.4   19.0
     July  6    15 23.80    -34 06.5                    -0.72  + 4.3
          16    15 21.57    -33 33.6    2.763   3.418   -0.69  + 4.2   19.0
          26    15 21.75    -33 05.3                    -0.66  + 4.0
     Aug.  5    15 24.25    -32 43.3    2.940   3.342   -0.64  + 3.9   19.1
          15    15 28.93    -32 28.1                    -0.62  + 3.5
          25    15 35.65    -32 19.8    3.139   3.265   -0.61  + 3.2   19.1
     Sept. 4    15 44.21    -32 17.7                    -0.61  + 3.0
          14    15 54.46    -32 20.7    3.334   3.188   -0.61  + 2.7   19.2
          24    16 06.23    -32 27.4                    -0.61  + 2.4
     Oct.  4    16 19.38    -32 36.4    3.505   3.111   -0.62  + 2.2   19.2
          14    16 33.79    -32 46.2                    -0.64  + 1.8
          24    16 49.34    -32 55.3    3.643   3.035   -0.65  + 1.5   19.1

               m2 = 11.5 + 5 log Delta + 10 log r


1976 December 28               (3021)              Brian G. Marsden

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