SIMBAD references

2004ApJ...603..139Y - Astrophys. J., 603, 139-151 (2004/March-1)

OGLE-2003-BLG-262: finite-source effects from a point-mass lens.

YOO J., DEPOY D.L., GAL-YAM A., GAUDI B.S., GOULD A., HAN C., LIPKIN Y., MAOZ D., OFEK E.O., PARK B.-G., POGGE R.W. (The {mu}FUN Collaboration), UDALSKI A., SOSZYNSKI I., WYRZYKOWSKI L., KUBIAK M., SZYMANSKI M., PIETRZYNSKI G., SZEWCZYK O., ZEBRUN K. (The OGLE Collaboration)

Abstract (from CDS):

We analyze OGLE-2003-BLG-262, a relatively short (tE=12.5±0.1 day) microlensing event generated by a point-mass lens transiting the face of a K giant source in the Galactic bulge. We use the resulting finite-source effects to measure the angular Einstein radius, θE=195±17 µas, and so constrain the lens mass to the FWHM interval 0.08<M/M<0.54. The lens-source relative proper motion is µrel=27±2 km/s/kpc. Both values are typical of what is expected for lenses detected toward the bulge. Despite the short duration of the event, we detect marginal evidence for a ``parallax asymmetry'' but argue that this is more likely to be induced by acceleration of the source, a binary lens, or possibly by statistical fluctuations. Although OGLE-2003-BLG-262 is only the second published event to date in which the lens transits the source, such events will become more common with the new OGLE-III survey in place. We therefore give a detailed account of the analysis of this event to facilitate the study of future events of this type.

Abstract Copyright:

Journal keyword(s): Cosmology: Gravitational Lensing - Stars: Low-Mass, Brown Dwarfs

CDS comments: OGLE-2003-BLG-262 = EWS 2003-BUL-262 in SIMBAD

Simbad objects: 6

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2004ApJ...603..139Y and select 'bookmark this link' or equivalent in the popup menu


2021.05.17-02:10:54

© Université de Strasbourg/CNRS

    • Contact