Central Bureau for Astronomical Telegrams
IAUC 4973: COORDINATED GROUND Obs TO SUPPORT ASTRO-1; 1989c1; T Leo
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Circular No. 4973
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
COORDINATED GROUND OBSERVATIONS TO SUPPORT ASTRO-1
E. M. Schlegel writes: "The Astro-1 payload --- the Broad Band
X-Ray Telescope (BBXRT), the Hopkins Ultraviolet Telescope (HUT),
the Ultraviolet Imaging Telescope (UIT), and the Wisconsin Ultraviolet
PhotoPolarimeter Experiment (WUPPE) --- will be carried, by
shuttle, into orbit for a 10-day mission, starting on 1990 May 9.
The target list for these instruments includes normal stars,
supergiants, CVs, LMXRBs, HMXRBs, SNRs, globular cluster sources, normal
galaxies, AGNs, and galaxy clusters. Good-quality optical, infrared,
and radio data will enhance the scientific return. Some targets
will benefit from simultaneous, ground-based observations, while
others will only need quasi-simultaneous data. All observers
interested in contributing are encouraged to contact me, supplying
the type of observations that can be contributed. As this is a
shuttle mission, the observing timeline may change with very short
notice. Rapid communication will be essential, and will be carried
out via electronic mail. Please supply an electronic mail address,
or for rare cases, a FAX number. Several methods have been
established for access to the current, combined Astro-1 target list,
and for additional information and news: anonymous ftp to
nssdca.gsfc.nasa.gov, directory astro-1; or default DECnet to
directory nssdca::[anonymous.astro-1]; others are in preparation.
Interested persons may contact Eric M. Schlegel, Code 666, Goddard
Space Flight Center, Greenbelt, MD 20771, U.S.A. [telephone
301-286-6636; FAX 301-286-3391; Internet: eric@heasfs.gsfc.nasa.gov;
SPAN: 6197::schlegel]."
COMET AUSTIN (1989c1)
S. Larson, Lunar and Planetary Laboratory, reports that
direct broadband red images and spectra (range 300-880 nm) taken
on Feb. 25.1 UT with the Catalina 1.5-m telescope (+ CCD) show a
featureless coma (even after spatial filtering) and the usual
cometary emissions of CN, C3 and C2.
T LEONIS
Visual magnitude estimates (cf. IAUC 4965): Feb. 16.54 UT,
10.7 (H. Narumi, Ehime, Japan); 16.91, 12.3 (P. Schmeer,
Bischmisheim, W. Germany); 17.76, 12.0 (A. Pearce, Scarborough,
W. Australia).
1990 March 2 (4973) Daniel W. E. Green
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