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Constraints on Jupiters from observations of Galactic bulge microlensing events during 2000

Bibcode
2002MNRAS.337...41T
DOI
10.1046/j.1365-8711.2002.05776.x
Tsapras, Yiannis; Horne, Keith; Carson, Richard; Alvarez, Javier Méndez; Batcheldor, Dan; Graham, Alister W.; James, Philip A.; Knapen, Johan; Quaintrell, Hannah; Gonzalez Serrano, Ignacio; Sorensen, Peter; Wooder, Nick
Bibliographical reference

Monthly Notice of the Royal Astronomical Society, Volume 337, Issue 1, pp. 41-48.

Advertised on:
11
2002
Number of authors
12
IAC number of authors
6
Citations
3
Refereed citations
2
Description
We present observations of eight Galactic bulge microlensing events taken with the 1.0-m Jacobus Kapteyn Telescope (JKT) on La Palma during 2000 June and July. The JKT observing schedule was optimized using a prioritizing algorithm to automatically update the target list. For most of these events we have sampled the light curves at times where no information was available from the OGLE alert team. We assume a point-source point-lens (PSPL) model and perform a maximum likelihood fit to both our data and the OGLE data to constrain the event parameters of the fit. We then refit the data assuming a binary lens and proceed to calculate the probability of detecting planets with mass ratio q= 10-3. We have seen no clear signatures of planetary deviations on any of the eight events and we quantify constraints on the presence of planetary companions to the lensing stars. For two well-observed events, 2000BUL31 and 2000BUL33, our detection probabilities peak at ~30 and ~20 per cent respectively for q= 10-3 and a~RE for a Δχ2 threshold value of 60.
Type
Refereed
Gravitational lensing
Techniques

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