2021AJ....161..270H

Query : 2021AJ....161..270H

2021AJ....161..270H - Astron. J., 161, 270-270 (2021/June-0)

KMT-2019-BLG-1715: planetary microlensing event with three lens masses and two source stars.

HAN C., UDALSKI A., KIM D., JUNG Y.K., LEE C.-U., BOND I.A. (The Leading Authors), ALBROW M.D., CHUNG S.-J., GOULD A., HWANG K.-H., KIM H.-W., RYU Y.-H., SHIN I.-G., SHVARTZVALD Y., ZANG W., YEE J.C., CHA S.-M., KIM D.-J., KIM S.-L., LEE D.-J., LEE Y., PARK B.-G., POGGE R.W., KIM C.-H., KIM W.-T. (The KMTNet Collaboration), MROZ P., SZYMANSKI M.K., SKOWRON J., POLESKI R., SOSZYNSKI I., PIETRUKOWICZ P., KOZLOWSKI S., ULACZYK K., RYBICKI K.A., IWANEK P., WRONA M., GROMADZKI M. (The OGLE Collaboration), ABE F., BARRY R., BENNETT D.P., BHATTACHARYA A., DONACHIE M., FUJII H., FUKUI A., ITOW Y., HIRAO Y., KIRIKAWA R., KONDO I., LI M.C.A., MATSUBARA Y., MURAKI Y., MIYAZAKI S., RANC C., RATTENBURY N.J., SATOH Y., SHOJI H., SUEMATSU H., SUMI T., SUZUKI D., TANAKA Y., TRISTRAM P.J., YAMAKAWA T., YAMAWAKI T., YONEHARA A. (The MOA Collaboration)

Abstract (from CDS):

We investigate the gravitational microlensing event KMT-2019-BLG-1715, the light curve of which shows two short-term anomalies from a caustic-crossing binary-lensing light curve: one with a large deviation and the other with a small deviation. We identify five pairs of solutions, in which the anomalies are explained by adding an extra lens or source component in addition to the base binary-lens model. We resolve the degeneracies by applying a method in which the measured flux ratio between the first and second source stars is compared with the flux ratio deduced from the ratio of the source radii. Applying this method leaves a single pair of viable solutions, in both of which the major anomaly is generated by a planetary-mass third body of the lens, and the minor anomaly is generated by a faint second source. A Bayesian analysis indicates that the lens comprises three masses: a planet-mass object with ∼2.6 MJ and binary stars of K and M dwarfs lying in the galactic disk. We point out the possibility that the lens is the blend, and this can be verified by conducting high-resolution follow-up imaging for the resolution of the lens from the source.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Gravitational microlensing exoplanet detection

VizieR on-line data: <Available at CDS (J/AJ/161/270): ogle.dat moa.dat kmta[12].dat kmtc1.dat kmtc2.dat kmts1.dat kmts2.dat>

Simbad objects: 8

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Number of rows : 8
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-2008-BLG-092 ** 17 47 29.4593818584 -34 43 35.461182180       15.48   ~ 43 0
2 MOA 2013-BLG-260 ** 17 52 07.49 -29 50 46.0           ~ 45 0
3 OGLE-2016-BLG-0613 ** 17 57 02.50 -28 06 58.2           ~ 29 0
4 OGLE-2006-BLG-284 * 17 58 38.22 -29 08 12.0           ~ 14 0
5 OGLE-2018-BLG-1700 * 17 59 49.45 -28 31 43.1           ~ 26 0
6 MOA 2012-BLG-486 * 18 01 08.82 -33 13 06.1           ~ 6 0
7 OGLE-2019-BLG-1190 * 18 01 29.21 -28 46 37.7           ~ 12 0
8 MOA 2007-BLG-379 ** 18 05 24.43 -26 25 18.8           ~ 58 1

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