Central Bureau for Astronomical Telegrams
IAUC 3150: EXTRAGALACTIC Id OF 4U 0241+62; 1977l; 1977p
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Read IAUC 3151
Circular No. 3150
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
EXTRAGALACTIC IDENTIFICATION OF 4U 0241+62
K. Apparao, Tata Institute of Fundamental Research; L.
Maraschi and G. Bignami, University of Milan; H. Helmken, Center
for Astrophysics; B. Margon, University of California at Los Angeles;
R. Hjellming, National Radio Astronomy Observatory; and H.
Bradt and R. Dower, Massachusetts Institute of Technology, report
the precise position and extragalactic identification of the
galactic-plane (b = +2o.4) x-ray source 4U 0241+62. X-ray observations
with SAS 3 on Nov. 24-29 yielded the position R.A. = 2h41m01s.3, Decl. =
+62o15'27" (equinox 1950.0; 90-percent-confidence error radius 30")
and a 2-11 keV flux density of 1.4 uJy (3.1 x 10**-11 erg cm**-2 s**-1).
Spectrophotometry of the brightest object (V ~ 16) in the x-ray
error circle with the Lick Observatory's 305-cm reflector on Dec. 3
revealed this starlike object to be either a QSO or a Seyfert nucleus.
It exhibits intense and very broad H-alpha emission, weak H-beta and
He I emission, narrow [O III] emission and intense forbidden coronal
lines, all yielding a redshift of z = 0.044. The spectra also
show very prominent interstellar 4430 A, Na D and 6284 A absorption
at zero redshift, presumably due to galactic interstellar absorption.
At the redshift distance of 260 Mpc the 2-11 keV luminosity
is 2 x 10**44 erg s**-1. Radio observations on Dec. 5 with the VLA
yielded an intense, pointlike (< 1") radio source located at R.A. =
2h41m00s.68 +/- 0s.03, Decl. = +62o15'27".5 +/- 0".5 (equinox 1950.0), within
2" of the optical position. Based on preliminary calibrations the
measured flux densities were 0.26, 0.19, 0.50 and 0.55 Jy at 1465,
4885, 14 765 and 22 485 MHz, respectively. The radio spectrum is
typical of multicomponent synchrotron sources such as quasars or
galactic nuclei. The object lies in the relatively large-error (1o
radius) region of the COS-B gamma-ray source CG 135+1 (Hermsen et al.
1977, Nature 269, 494).
PERIODIC COMET CHERNYKH (1977l)
The following precise positions have been reported:
1977 UT R. A. (1950) Decl. m1 Observer
Sept. 3.17962 0 17 39.77 - 4 10 44.8 Schuster
Oct. 14.61378 23 58 30.47 - 7 31 54.0 K. Suzuki
14.61969 23 58 30.44 - 7 31 57.2 "
Nov. 3.47708 23 53 42.33 - 8 02 12.1 T. Suzuki
3.48194 23 53 42.35 - 8 02 10.2 "
3.81219 23 53 41.42 - 8 02 05.4 Milet
4.13056 23 53 40.73 - 8 02 03.8 Giclas
6.83157 23 53 39.72 - 8 00 24.7 13.0 Vavrova
6.84269 23 53 39.59 - 8 00 24.8 "
7.77464 23 53 41.68 - 7 59 27.8 13.2 Mrkos
7.78610 23 53 41.80 - 7 59 30.9 "
10.55382 23 53 54.22 - 7 55 59.5 K. Suzuki
10.55938 23 53 54.34 - 7 55 58.4 "
10.72667 23 53 55.73 - 7 55 42.6 13.2 Mrkos
10.73756 23 53 55.80 - 7 55 41.0 "
11.58125 23 54 01.70 - 7 54 21.4 K. Suzuki
11.79762 23 54 03.62 - 7 53 57.1 13.5 Mrkos
H.-E. Schuster (European Southern Obs.). Measurer: R. M. West.
K. Suzuki (JCPM Oi Station) and T. Suzuki (JCPM Yakiimo Station).
Measurer: T. Urata. From Nihondaira Obs. Circ. Nos. 918 and 922.
B. Milet (Nice Observatory)
H. L. Giclas (Lowell Observatory). Measurer: M. L. Kantz.
Vavrova and A. Mrkos (Klet Observatory).
PERIODIC COMET SANGUIN (1977p)
Further precise positions have been reported as follows:
1977 UT R. A. (1950) Decl. Observer
Oct. 19.13762 22 32 58.60 - 8 07 37.7 Torres
31.46760 22 49 11.25 -10 04 27.5 Seki
C. Torres (University of Chile, Cerro El Roble Station). Faint
nebulous image, diameter ~ 6". Measurer: M. Wischnjewsky.
T. Seki (Geisei). From Yamamoto Circ. No. 1867.
The following improved elliptical elements, by B. G. Marsden,
are from 10 observations Sept. 13 to Oct. 31:
T = 1977 Sept. 17.446 ET
Peri. = 162.030 e = 0.66415
Node = 182.259 1950.0 a = 5.39204 AU
Incl. = 18.646 n = 0.078718
q = 1.81089 AU P = 12.52 years
1978 ET R. A. (1950) Decl. Delta r m1
Jan. 12 0 52.52 - 6 15.9 2.128 2.164 18.5
22 1 10.47 - 4 47.0
Feb. 1 1 28.37 - 3 15.8 2.446 2.274 19.0
11 1 46.21 - 1 44.4
21 2 03.96 - 0 14.7 2.765 2.392 19.5
Mar. 3 2 21.62 + 1 11.5
13 2 39.17 + 2 33.0 3.074 2.516 19.9
23 2 56.59 + 3 48.6
Apr. 2 3 13.86 + 4 57.7 3.362 2.643 20.4
1977 December 13 (3150) Brian G. Marsden
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