SIMBAD references

2019ApJ...876...81H - Astrophys. J., 876, 81-81 (2019/May-1)

OGLE-2018-BLG-0022: first prediction of an astrometric microlensing signal from a photometric microlensing event.

HAN C., BOND I.A., UDALSKI A., GOULD A., BOZZA V., HIRAO Y., CASSAN A., ALBROW M.D., CHUNG S.-J., HWANG K.-H., LEE C.-U., RYU Y.-H., SHIN I.-G., SHVARTZVALD Y., YEE J.C., JUNG Y.K., KIM D., KIM W.-T., CHA S.-M., KIM D.-J., KIM H.-W., KIM S.-L., LEE D.-J., LEE Y., PARK B.-G., POGGE R.W., ZANG W. (The KMTNet Collaboration), ABE F., BARRY R., BENNETT D.P., BHATTACHARYA A., DONACHIE M., FUKUI A., ITOW Y., KAWASAKI K., KONDO I., KOSHIMOTO N., LI M.C.A., MATSUBARA Y., MURAKI Y., MIYAZAKI S., NAGAKANE M., RANC C., RATTENBURY N.J., SUEMATSU H., SULLIVAN D.J., SUMI T., SUZUKI D., TRISTRAM P.J., YONEHARA A. (The MOA 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. (The OGLE Collaboration), BEICHMAN C.A., BRYDEN G., CAREY S., GAUDI B.S., HENDERSON C.B. (The Spitzer Microlensing Team)

Abstract (from CDS):

In this work, we present the analysis of the binary microlensing event OGLE-2018-BLG-0022 that is detected toward the Galactic bulge field. The dense and continuous coverage with the high-quality photometry data from ground-based observations combined with the space-based Spitzer observations of this long timescale event enables us to uniquely determine the masses M1 = 0.40 ± 0.05 M☉ and M2 = 0.13 ± 0.01 M☉ of the individual lens components. Because the lens-source relative parallax and the vector lens-source relative proper motion are unambiguously determined, we can likewise unambiguously predict the astrometric offset between the light centroid of the magnified images (as observed by the Gaia satellite) and the true position of the source. This prediction can be tested when the individual-epoch Gaia astrometric measurements are released.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

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

CDS comments: OGLE-2017-BLG-053 is a misprint for OGLE-2017-BLG-0537 (which is EWS 2017-BLG-0537 in SIMBAD).

Simbad objects: 6

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