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IAUC 6284: GALACTIC CENTER; N Cas 1995; 116P

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                                                  Circular No. 6284
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
Phone 617-495-7244/7440/7444 (for emergency use only)


GALACTIC CENTER
     W. S. Paciesas, University of Alabama, Huntsville; B. A.
Harmon and G. J. Fishman, Marshall Space Flight Center (MSFC),
NASA; and S. N. Zhang and C. R. Robinson, Universities Space
Research Association and MSFC, report:  "BATSE occultation
monitoring indicates the emergence of a new hard x-ray source,
designated GRO J1744-28, in the region of the Galactic Center.  The
location (equinox 2000.0) is within a region whose vertices are R.A.
= 17h42m, Decl. = -27o15'; 17h45m, -28o25'; 17h43m, -28o43', 17h47m,
-29o46' (90-percent confidence).  Archival data show indications of
the source at gradually increasing intensity for approximately the
past month.  However, systematic confusion with other sources in
the region limits our ability to quantify the time of earliest
detection.  The average intensity between Jan. 1 and 7 was about
0.58 photons cmE-2 sE-1 in the band 20-100 keV, with small (10
percent) daily variations.  The spectrum can be approximately
represented by a steep power law with photon number index -4.2.
Contributions to the flux from nearby sources cannot be excluded.
The new source may be the persistent counterpart to the bursting
source previously reported (IAUC 6272, 6275, 6276).  If so, the
combination of the occultation source position with that reported
in IAUC 6276 provides a more precise location for this unusual
source."


NOVA CASSIOPEIAE 1995
     U. Munari, Asiago Observatory, communicates:  "Spectra (range
420-690 nm, resolution 0.04 nm) obtained with the Asiago 1.82-m
telescope (+ echelle spectrograph + CCD) on Jan. 3.8 UT show a
marked increase in the intensity and FWHM of the emission lines,
compared with similar observations in 1995 Nov. (cf. IAUC 6259).
The profiles of hydrogen Balmer and permitted Fe II lines still
show a narrow and deep absorption (FWHM 65 km/s) superimposed onto
a now broad emission (FWHM 650 km/s) component, shifted by about
-85 km/s from the latter.  Forbidden lines of O III and O I are
absent, and those of Fe II are quite weak and as broad as the
permitted ones."


COMET 116P/WILD 4
     Total magnitude estimates:  1995 Nov. 21.17 UT, 16.3 (H. Mikuz,
Ljubljana, Slovenia, 0.36-m reflector + V filter + CCD); Dec. 19.35,
14.1 (A. Hale, Cloudcroft, NM, 0.41-m reflector; visual); 27.31,
14.0 (Hale).

                      (C) Copyright 1996 CBAT
1996 January 9                 (6284)            Daniel W. E. Green

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