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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