PLANET DETECTION VIA MICROLENSING

Apr 28, 1997 - Microlensing occurs when a foreground compact object (like a star) moves between an observer and a luminous background object (like ano...

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Nov 16, 2015 - PERSU Sorbonne Université and the Programme National de Planétologie. References. Barry, R., Kruk, J., Anderson, J., et al. 2011, in Society of Photo-. Optical Instrumentation Engineers (SPIE) Conference Series,. Vol. 8151, Society o

Here DOL, DOS, and DLS are the distance between the observer, lens, and source, and M is the mass of the lens. ... full information for ∼ 15 events per year. .... called caustics. Five images are created if the source is inside a caustic, three if.

Sep 9, 2007 - String Network. 5. 3. Microlensing. 8. 4. Cosmology of Small Gµ Loops. 12. 5. Practical Lensing. 14. 6. Remarks. 18. A. Appendix. 20. A.1 Powerlaw f and a(t) ...... Log10 dN/dVd. Figure 6: Number density of the string length distributi

D. P. Bennetta, I. Bondb, E. Chengc, S. Friedmand, P. Garnavicha, B. Gaudie, R. Gillilandd, A. Gould f, M. Greenhouse g, ... This includes free- floating planets ejected from their host stars. MPF uses the gravitational microlensing technique which i

3. Fig. 2: Space-based microlensing (MPF) is sensitive to planets above the purple curve in the mass vs. semi-major axis plane. The gold, green and cyan regions indicate the sensitivities of radial velocity surveys, SIM and Kepler, respectively. Our

Figure 1. Rudi Mandl, shown here in the 1930s in Washington DC where he made a living as a busboy and washing dishes, persuaded Einstein to publish his 1936 paper on gravitational lensing. Photo courtesy Tom ..... New microlensing projects have recen

These are typically easy to resolve given good temporal coverage of the planetary ...... Since the mass is given by M = (c2/4G)˜reteµ, and since ˜re and te ... measurement gave the angle of motion, one could check this against the direction.

Mar 27, 2013 - are monitoring a very large number of stars in order to detect real time on going microlensing events and alert ... the events to increase the monitoring cadence and then sensitivity to exoplanets. From a ..... brand DUNE) in 2007 to E

Apr 5, 2004 - Microlensing: Space vs. Ground-based Surveys. D. P. Bennett. University of Notre Dame, Notre Dame, IN 46556, USA. Abstract. I compare an aggressive ground-based gravitational microlensing survey for terrestrial planets to a space-based

Apr 5, 2004 - assumes a global network of very wide field-of-view ∼ 2m .... represent different microlensing models, and the magenta curve is the best fit ... curve coverage and photometric accuracy allows for accurate determination.

Feb 8, 2016 - from the host star. We perform an independent analysis of the microlensing light curves to extract the event parameters and compute the planet detection ...... 10. Y. Tsapras. Figure 6. Top: Best PSPL fit to the light curves of OGLE-200

Mar 24, 2000 - shape information and is less likely to be missing ex- ..... factor of 3 more than used in A96 and A97. ... This is a factor of five more PRFs than.

Nov 16, 2017 - Gravitational lensing provides an exceptional tool for investigating the ... of microlensing for a sub-stellar lens, like a free floating planet in the ..... Magnification. Best fit. Simulated data. FIG. 4. Simulated data points and th

events have been observed by the MACHO survey, allowing powerful statements to be made about .... In most cases only a fraction of the observed flux in the lightcurve is actu- ally lensed, and the PRF supplies us this fraction as a function of seeing

Jul 10, 2014 - [email protected] ABSTRACT ... 1Department of Astronomy, The Ohio State University, 140 W. 18th Ave., Columbus, OH 43210, USA. 2National ... events must be improved in order to process the data in a timely way. Numerical

and V bands cover the event from just before the first caustic crossing until .... Hence, we renormalize photometric errors to force the final reduced χ2/dof = 1 ... dx. (1 − x2)n+1/2. (x − η)1/2. Θ(1 − η),. (1b). H1/2(η) ≡ G1/2(η) −

Jul 30, 2015 - tions of the source and lens stars for planetary microlensing event OGLE-2005-BLG-169, ... passbands and remove light curve model ambiguity caused by sparse sampling of part ..... values, so there is no trend with color.

The photometric light curve solution predicts the motion of the source centroid up to an orientation on the ..... (c,d) Fitting to the entire photometric dataset ..... into the parameters ∆t, φ and tE. Nevertheless, in all four cases the dimension

Mar 1, 2013 - to stellar X-ray detections out to 5–10 pc, depending on the spectral type, so there is a distance-related selection effect in this set of data. Therefore, we composed a sample of all known planet-hosting stars within a distance of 30

Template. Photometry. Database. Known Object. Catalog. Network Data. Server. Alert Monitor. Visual Inspection. Email. WWW. GMAN. Figure 1. Information ow in the MACHO alert system. Global Microlensing Alert Network (GMAN) is the coordinated followup

Feb 10, 2009 - the planetary host stars and allow measurement of planetary orbital parameters. Finally, we show ... the gravitational field of the foreground stars and any planets that they might host. The relative motion of ..... q and t∗ determin

Conceptual Analytics, LLC, Glen Dale, MD, USA f. Lawrence Livermore National Laboratory, ... Basics of the Gravitational Microlensing Method. The physical basis of microlensing is the .... survey data will be needed for the detection of host stars fo

interval of 1.6 hours and a photometric precision of better than 0.10mag even at I=19 has been clearly demonstrated. ..... For the MACHO team, this has typically meant sampling intervals of ∼24 hours or more for .... experience with a particular pr

Jul 30, 2015 - 8Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA. 9Warsaw ... we describe the HST data and its reduction, and in Section 5.1 we compare the lens-source relative ... The constraints on the l