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IAUC 3906: 1983 XF; V0332+53; NEW IR SOURCE

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IAUC number 

                                                  Circular No. 3906
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM     Telephone 617-864-5758


1983 XF
     Ephemeris from the orbital elements on IAUC 3905:

     1984 ET     R.A. (1950.0) Decl.      p        r      Mag.

     Jan.  1     4 00.95    +22 28.3    0.703    1.603    16.8
          11     4 00.24    +23 16.8
          21     4 05.18    +24 14.8    0.740    1.528    17.0
          31     4 15.82    +25 19.4
     Feb. 10     4 31.87    +26 25.8    0.807    1.475    17.3
          20     4 52.78    +27 27.2
     Mar.  1     5 17.80    +28 16.1    0.894    1.450    17.5
          11     5 46.17    +28 45.5
          21     6 16.97    +28 49.8    0.999    1.455    17.8


V0332+53
     A. N. Parmar, R. J. Blissett, T. Courvoisier and L. Chiappetti,
EXOSAT Observatory, Darmstadt, inform us that, following
the report from the U.K. Infrared Observatory of a J-band flare
(IAUC 3904), observations on 1983 Dec. 24.5 and 25.7 UT show that
this source is again bright in x-rays.  Previous EXOSAT observations
measured a decline in source strength from 0.06 Crab on Nov.
20.3 to < 0.001 Crab on Dec. 1.1: the latest observations show the
strength again to be 0.06 Crab (IAUC 3893).  The x-ray intensity
is again modulated with a coherent 4.4-s period (IAUC 3902).  The
pulse profile resembles a double sinusoid with peak-to-peak
amplitude 10 percent.  Further EXOSAT observations are planned.


NEW INFRARED SOURCE
     N. M. Ashok, H. C. Bhatt and T. Chandrasekhar, Physical
Research Laboratory, Ahmedabad: and S. C. Joshi, Uttar Pradesh
State Observatory, Naini Tal, report: "We have searched at a
wavelength of 2.2 microns a 3' x 3' area centered on IRAS 0453+444P03
(Neugebauer and Habing 1983, Nature 305, 578).  No source brighter
than K = 7.0 was detected, although an uncatalogued infrared
source (with K = 4.3, H = 5.1, J = 6.0) was serendipitously detected
nearby at R.A. = 4h52m08s, Decl. = +44deg26'5 (equinox 1950.0).  This
new source has no optical counterpart brighter than V = 15.  The
observations were made using an INSB photometer with a 30" beam at
the 1-m Naini Tal telescope on 1983 Nov. 30.  Infrared spectroscopy
and far-infrared observations of the source are requested."


1984 January 4                 (3906)              Brian G. Marsden

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