Central Bureau for Astronomical Telegrams
IAUC 3163: 4U 0115+63; 1977l; 1976k
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Circular No. 3163
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
4U 0115+63
L. Cominsky, F. Li, H. Bradt, G. W. Clark and S. Rappaport,
Massachusetts Institute of Technology, report that the SAS-3 Group
has measured the position of the hard, pulsing, transient x-ray
source 4U 0115+63 (cf. IAUC 3161). The position determined from
the rotation modulation collimators on SAS 3 is R.A. = 1h15m15s.7, Decl. =
+63o28'45" (equinox 1950.0) with an error-circle radius of 30"
(90-percent confidence). Attention is drawn to the star of mv ~ 16
that is the brightest one in the error circle; it is located about
11'.8 and 1'.0 east of SAO 011683 (mv = 8.2).
M. Johnston, H. Bradt, R. Doxsey, H. Gursky, D. Schwartz and
J. Schwarz, Massachusetts Institute of Technology and Center for
Astrophysics, report an improved position for 4U 0115+63 obtained
with the modulation collimator experiment on HEAO 1: R.A. = 1h15m13s.7,
Decl. = +63o28'41" (equinox 1950.0). The error region (90-percent
confidence) is approximated by a north-south band (p.a. 353o) of full
width 20" and length 100". The mv ~ 16 star noted above lies within
the error region, 3" +/- 4" west of the center. The two faint
stars ~ 25" northwest of this star lie just (~ 5") outside the
HEAO-1 and SAS-3 error regions. The 3s.6 period reported by the
SAS-3 Group (IAUC 3161) is clearly evident in the HEAO data. The
pulsed fraction (1-13 keV) is ~ 30 percent. On Jan. 16 the average
intensity was ~ 0.30 that of the Crab.
PERIODIC COMET CHERNYKH (1977l)
Further precise positions have been reported as follows:
1977 UT R. A. (1950) Decl. m1 Observer
Sept. 8.92943 0 15 37.58 - 4 39 57.8 Chernykh
8.93973 0 15 37.36 - 4 40 00.4 "
10.93618 0 14 48.72 - 4 50 33.7 "
10.94648 0 14 48.53 - 4 50 35.8 "
18.92055 0 11 08.87 - 5 33 37.4 "
18.92749 0 11 08.78 - 5 33 40.2 "
22.97583 0 09 06.46 - 5 55 23.0 "
22.98279 0 09 06.17 - 5 55 25.3 "
Oct. 7.87955 0 01 30.93 - 7 07 12.5 "
7.88995 0 01 30.74 - 7 07 16.9 "
8.98079 0 00 59.00 - 7 11 42.7 "
11.82192 23 59 41.88 - 7 22 24.3 "
11.82539 23 59 41.69 - 7 22 28.6 "
13.82707 23 58 50.19 - 7 29 22.7 "
13.83749 23 58 49.75 - 7 29 25.6 "
17.83070 23 57 16.13 - 7 41 21.9 "
17.84169 23 57 15.94 - 7 41 25.7 "
18.77094 23 56 56.13 - 7 43 51.1 "
Nov. 2.76931 23 53 44.56 - 8 02 19.7 "
2.77903 23 53 44.63 - 8 02 19.6 "
6.78101 23 53 39.50 - 8 00 25.1 "
6.79027 23 53 39.63 - 8 00 24.6 "
Dec. 2.50729 0 01 41.96 - 6 41 31.3 14.5 Suzuki
2.51215 0 01 42.25 - 6 41 30.9 "
8.77839 0 05 48.71 - 6 06 47.5 Chernykh
8.78534 0 05 48.97 - 6 06 42.4 "
11.71588 0 08 00.40 - 5 48 41.8 "
11.73012 0 08 00.92 - 5 48 36.1 "
12.72193 0 08 47.72 - 5 42 14.8 "
12.73582 0 08 48.45 - 5 42 08.5 "
N. S. Chernykh, L. G. Karachkina and L. V. Zhuravleva (Crimean
Astrophysical Obs.). Mainly from Kiev Komet. Tsirk. No. 217.
K. Suzuki (JCPM Oi Station). From Nihondaira Obs. Circ. No. 934.
COMET LOVAS (1976k)
Precise positions measured by J. H. Bulger from exposures by
G. Schwartz and C.-Y. Shao at Harvard Observatory's Agassiz Station:
1976/77 UT R. A. (1950) Decl.
Dec. 19.30586 8 29 33.87 +73 27 55.2
Feb. 18.10311 6 18 12.29 +66 46 06.0
Apr. 20.12168 6 18 02.63 +55 28 40.8
Extension of the ephemeris on IAUC 3086:
1978 ET R. A. (1950) Decl. Delta r m2
Mar. 13 6 33.41 +32 45.5 6.935 7.260 20.3
23 6 32.33 +31 53.6
Apr. 2 6 32.39 +31 03.7 7.350 7.340 20.5
12 6 33.48 +30 15.9
22 6 35.46 +29 30.2 7.760 7.422 20.7
May 2 6 38.20 +28 46.5
12 6 41.56 +28 04.4 8.130 7.504 20.8
22 6 45.42 +27 23.8
June 1 6 49.65 +26 44.3 8.434 7.588 20.9
m2 = 7.5 + 5 log Delta + 10 log r
1978 January 19 (3163) Brian G. Marsden
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