2017AJ....154..176S


Query : 2017AJ....154..176S

2017AJ....154..176S - Astron. J., 154, 176-176 (2017/November-0)

OGLE-2016-BLG-0168 binary microlensing event: prediction and confirmation of the microlens parallax effect from space-based observations.

SHIN I.-G., UDALSKI A., YEE J.C., CALCHI NOVATI S., HAN C., SKOWRON J., MROZ P., SOSZYNSKI I., POLESKI R., SZYMANSKI M.K., KOZLOWSKI S., PIETRUKOWICZ P., ULACZYK K., PAWLAK M. (The OGLE Collaboration), ALBROW M.D., GOULD A., CHUNG S.-J., HWANG K.-H., JUNG Y.K., RYU Y.-H., ZHU W., CHA S.-M., KIM D.-J., KIM H.-W., KIM S.-L., LEE C.-U., LEE Y., PARK B.-G., POGGE R.W. (The KMTNet Group), BEICHMAN C., BRYDEN G., CAREY S., GAUDI B.S., HENDERSON C.B., SHVARTZVALD Y. (The Spitzer Team)

Abstract (from CDS):

The microlens parallax is a crucial observable for conclusively identifying the nature of lens systems in microlensing events containing or composed of faint (even dark) astronomical objects such as planets, neutron stars, brown dwarfs, and black holes. With the commencement of a new era of microlensing in collaboration with space-based observations, the microlens parallax can be routinely measured. In addition, space-based observations can provide opportunities to verify the microlens parallax measured from ground-only observations and to find a unique solution to the lensing light-curve analysis. Furthermore, since most space-based observations cannot cover the full light curves of lensing events, it is also necessary to verify the reliability of the information extracted from fragmentary space-based light curves. We conduct a test based on the microlensing event OGLE-2016-BLG-0168, created by a binary lens system consisting of almost equal mass M-dwarf stars, to demonstrate that it is possible to verify the microlens parallax and to resolve degeneracies using the space-based light curve even though the observations are fragmentary. Since space-based observatories will frequently produce fragmentary light curves due to their short observing windows, the methodology of this test will be useful for next-generation microlensing experiments that combine space-based and ground-based collaboration.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): binaries: general - gravitational lensing: micro - gravitational lensing: micro

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 OGLE-2011-BLG-0417 * 17 34 33.11 -27 06 39.3           ~ 15 0
2 OGLE-2016-BLG-0168 * 17 50 49.89 -31 45 30.1           ~ 5 0
3 NAME EWS 2011-BLG-420b Pl 17 50 56.1715170240 -29 49 30.216419616           ~ 5 1
4 MOA 2009-BLG-232 * 17 54 22.3539093816 -29 03 21.146804712           ~ 13 1
5 NAME Galactic Bulge reg ~ ~           ~ 4290 0

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