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IAUC 5123: 1990ae; THE GALACTIC CENTER; 1990c; 1989t

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                                                  Circular No. 5123
Central Bureau for Astronomical Telegrams
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505

     R. Lopez, University of Barcelona, reports:  "A low-resolution,
first-order spectrum, taken on Oct. 25 with the Faint Object
Spectrograph (range 460-980 nm) on the 4.2-m William Herschel Telescope
at La Palma by G. Gomez, J. A. Rodriguez, A. Aparicio, and A.
Diego (Instituto de Astrofisica de Canarias and Observatorio de
Roque de los Muchachos), confirms the previous report on IAUC 5119
that SN 1990ae is a type-II supernova, as inferred from its
characteristic H-alpha P-Cyg profile.  The feature presents broad
emission and well-marked absorption wings, with an inferred
relative velocity of about 5100 km/s."

     R. Sunyaev, on behalf of the GRANAT Team, reports:  "Using the
coded mask imaging spectrometer ART-P, two previously unknown x-ray
sources were discovered during a survey of the Galactic Center
region, < 1.8 deg from Sgr A.  GRS 1736-297, detected on Sept. 18, is
at R.A. = 17h36m20s.6, Decl. = -29 41'50" (equinox 1950.0).  Another
source, GRS 1734-292 (R.A. = 17h34m13s.4, Decl. = -29 09'02"), was
outside the instrument 3.4 deg x 3.6 deg field-of-view at that time.
(The positions were determined within 1' error boxes).  On Oct. 6
both sources were observed.  The sources have hard spectra with a
strong absorption at low energies.  The 3- to 12-keV fluxes were
about 2 mCrab for both sources.  Three other sources, 1E 1740-294,
A1742-294, and SLX 1732-304, were detected in the same field."

COMET LEVY (1990c)
     Total visual magnitude estimates (cf. IAUC 5100):  Sept. 27.52
UT, 5.4 (A. Pearce, Scarborough, W.A., 20x80 binoculars); 29.00,
6.1 (V. F. de Assis Neto, Sao Francisco de Oliveira, Brazil, 10x70
binoculars); Oct. 8.94, 5.6 (de Assis Neto; 0.6 deg tail in p.a.
115 deg); 15.49, 6.0 (Pearce; 0.8 deg tail in p.a. 122 deg); 22.48,
6.0 (Pearce; 0.33 deg tail).

     Total visual magnitude estimates by A. Hale, Las Cruces, NM
(0.41-m reflector):  Oct. 17.50 UT, 12.5; 23.50, 12.5.

1990 October 26                (5123)             Daniel W. E. Green

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