Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 6177: MICROLENSING EVENT IN THE GALACTIC BULGE; 1991 JX; 57P

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 6176 SEARCH Read IAUC 6178

View IAUC 6177 in .dvi or .ps format.
IAUC number 

                                                  Circular No. 6177
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)


MICROLENSING EVENT IN THE GALACTIC BULGE
     The OGLE microlensing search team (A. Udalski, M. Szymanski, J.
Kaluzny, M. Kubiak, W. Krzeminski, and M. Mateo; Warsaw University
Observatory, Carnegie Institution of Washington, and University of
Michigan) reports detection of another possible gravitational
microlensing event in progress with the OGLE Early Warning System:
"Observations collected with the 1-m Swope telescope at the Las
Campanas Observatory indicate that the star (R.A. = 18h02m07s.59,
Decl. = -30o01'13".0, equinox 2000.0) had brightened by about 0.7
mag from its normal brightness during 1992-1994 (I = 18.45, V-I =
+1.55).  The candidate seems to be on the rising branch of the
microlensing light curve, well ahead of maximum.  The event will
very likely have a long timescale.  We encourage follow-up
photometric and spectroscopic observations that may provide
valuable information about the microlensing object.  A finding
chart, light curve, and regularly updated photometry can be found
in the OGLE archive (anonymous ftp sirius.astrouw.edu.pl, directory
/ogle/ews/1995/bw5)."


1991 JX
     M. Hicks and W. Grundy, Lunar and Planetary Laboratory,
University of Arizona, write:  "CCD spectrograms (0.55-1.05 microns,
resolution 1.5 nm) of the earth-approaching asteroid 1991 JX were
taken at the Catalina Station 1.54-m telescope on May 29, 30, and
31.  Analysis of the spectra shows that the relative reflectance of
1991 JX is in complete agreement with the spectral family of Vesta-
like objects as identified by Binzel and Xu (1993, Science 260,
186).  Our observations represent a total of 6.8 hr of integration.
The composite spectrum shows a reddish slope, increasing by a factor
of 12 percent over a range from 0.55 to 0.70 micron.  The apparent
pyroxene absorption band is centered at 0.92-0.94 micron, with the
characteristic upturn at longer wavelengths."


COMET 57P/DU TOIT-NEUJMIN-DELPORTE
     Unfiltered CCD total magnitudes reported by J. V. Scotti, Kitt
Peak (0.9-m Spacewatch telescope):  May 23.20 UT, 21.4; 23.24, 21.0.
The comet appeared very nearly stellar, with a coma diameter of 8"
on May 23.


1995 June 8                    (6177)            Daniel W. E. Green

Read IAUC 6176 SEARCH Read IAUC 6178

View IAUC 6177 in .dvi or .ps format.

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!