2002MNRAS.329..349M

Query : 2002MNRAS.329..349M

2002MNRAS.329..349M - Mon. Not. R. Astron. Soc., 329, 349-354 (2002/January-2)

Optical Gravitational Lensing Experiment OGLE-1999-BUL-32: the longest ever microlensing event - evidence for a stellar mass black hole.

MAO S., SMITH M.C., WOZNIAK P., UDALSKI A., SZYMANSKI M., KUBIAK M., PIETRZYNSKI G., SOSZYNSKI I. and ZEBRUN K.

Abstract (from CDS):

We describe the discovery of the longest microlensing event ever observed, OGLE-1999-BUL-32, also independently identified by the MACHO collaboration as MACHO-99-BLG-22. This unique event has an Einstein radius crossing time of 640d. The high-quality data obtained with difference image analysis shows a small but significant parallax signature. This parallax effect allows one to determine the Einstein radius projected on to the observer plane as r∼_E~29.1 au. The transverse velocity projected on to the observer plane is about 79kms–1. We argue that the lens is likely to have a mass of at least a few solar masses, i.e. it could be a stellar black hole. The black hole hypothesis can be tested using the astrometric microlensing signature with the soon-to-be installed Advanced Camera for Surveys on board the Hubble Space Telescope. Deep X-ray and radio images may also be useful for revealing the nature of the object.

Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): black hole physics - gravitational lensing - Galaxy: bulge - Galaxy: centre

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 OGLE BUL-SC33 164492 * 18 05 05.28 -28 34 41.7           ~ 38 0

Query : 2002MNRAS.329..349M

Basic data :
OGLE BUL-SC33 164492 -- Star
Other object types: otypes_help 		* (OGLE,MACHO)
ICRS coord. (ep=J2000) : 		18 05 05.28 -28 34 41.7 (Optical) [ ] C 2017A&A...605A..89B
FK4 coord. (ep=B1950 eq=1950) : 		18 01 55.10 -28 34 57.0 [ ]
Gal coord. (ep=J2000) : 		002.46016 -03.50510 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 37.6 [~] / z(~) 0.000125 [~] / cz 37.60 [~]
   (Opt) D 2017A&A...605A..89B
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Identifiers (4) :
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OGLE BUL-SC33 164492 MACHO 99-BLG-22 MACHO 109.20893.3423 OGLE-1999-BUL-32

References (38 between 1850 and 2026) (Total 38)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Velocities : 1    Fe/H : 2   

   

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OGLE BUL-SC33 164492 MACHO 99-BLG-22 MACHO 109.20893.3423

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