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IAUC 6153: 1995I; GX 1+4; 1995F; 1995D

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                                                  Circular No. 6153
Central Bureau for Astronomical Telegrams
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
Phone 617-495-7244/7440/7444     TWX 710-320-6842 ASTROGRAM CAM

     C. Pollas, Observatoire de la Cote d'Azur (OCA), reports his
discovery of an apparent supernova of mag V about 19.5 on two films
taken by Pollas and D. Albanese with the OCA 0.9-m Schmidt
telescope on Feb. 28.15 and Mar. 1.15 UT.  SN 1995I is located at
R.A. = 13h20m59s.85, Decl. = +3o35'56".2 (equinox 2000.0), which is
0".5 west and 5".8 north of the galaxy's center, at the northern
tip of the host galaxy.  Another technical pan film (limiting mag
22) taken by Albanese and A. Maury on Mar. 24.08 shows that the
object has faded by about 1 mag or more, to mag 20.5-21.0.  No
object is present at this location on the original Palomar Sky
Survey prints.  A nearby star (V about 15.2) is at position end
figures 21m01s.33, 37'37".4.

GX 1+4
     D. Chakrabarty, T. Koh, T. A. Prince, and B. Vaughan,
California Institute of Technology; M. H. Finger and M. Scott,
Universities Space Research Association; and R. B. Wilson, Marshall
Space Flight Center, NASA, report for the Compton Gamma Ray
Observatory BATSE team:  "The accreting x-ray pulsar GX 1+4 has
undergone another torque reversal, and resumed spinning down on
around Mar. 2, thereby ending an extended spin-up episode that
began on 1994 Oct. 30 (IAUC 6105).  On Mar. 17.0 UT, the
barycentric pulse frequency was (8.21119 +/- 0.00002) x 10E-3 sE-1,
with a mean frequency derivative of (-1.25 +/- 0.04) x 10E-12 sE-2.
The phase-averaged pulsed intensity on this date was (9.0 +/- 0.9)
x 10E-4 photon cmE-2 sE-1 keVE-1 at 30 keV, with a power-law photon
index of 2.6 +/- 0.2 for the 20- to 100-keV pulsed flux."

     Additional CCD photometry by M. Blake, T. Fuller, D. J. Lane,
J. Asbell-Clarke, S. Mitchell, and S. Elieff, St. Mary's University
(cf. IAUC 6138; comparison star GSC 3811.0095):  Feb. 19.01 UT, R =
14.8 +/- 0.1; 28.226, 15.2 +/- 0.1; Mar. 11.989, 15.2 +/- 0.1;
20.021, 15.2 +/- 0.2.

     Additional CCD photometry (cf. IAUC 6149):  Mar. 11.94 UT, V
= 14.23 +/- 0.03, B-V = +0.79 +/- 0.05 (H. Mikuz, Ljubljana);
12.019, R = 14.2 +/- 0.1 (Blake et al.); 20.069, R = 14.4 +/- 0.1
(Blake et al.).

1995 March 27                  (6153)            Daniel W. E. Green

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