Central Bureau for Astronomical Telegrams
IAUC 3021: SN IN NGC 977; ENHANCED gamma-RAY EMISSION; 1975j; P/SCHWASSMANN-WACHMANN 1; P/ASHBROOK-JACKSON
The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).
Read IAUC 3022
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
Read IAUC 3022
Our Web policy. Index to the CBAT/MPC/ICQ pages.
