SIMBAD references

2018ApJ...867..136H - Astrophys. J., 867, 136-136 (2018/November-2)

OGLE-2017-BLG-0039: microlensing event with light from a lens identified from mass measurement.

HAN C., JUNG Y.K., UDALSKI A., BOND I., BOZZA V., ALBROW M.D., CHUNG S.-J., GOULD A., HWANG K.-H., KIM D., LEE C.-U., KIM H.-W., RYU Y.-H., SHIN I.-G., YEE J.C., SHVARTZVALD Y., CHA S.-M., KIM S.-L., KIM D.-J., LEE D.-J., LEE Y., PARK B.-G., POGGE R.W. (The KMTNet Collaboration), SZYMANSKI M.K., MROZ P., SKOWRON J., POLESKI R., SOSZYNSKI I., KOZLOWSKI S., PIETRUKOWICZ P., ULACZYK K., PAWLAK M. (The OGLE Collaboration), ABE F., BARRY R., BENNETT D.P., BHATTACHARYA A., DONACHIE M., EVANS P., FUKUI A., HIRAO Y., ITOW Y., KAWASAKI K., KOSHIMOTO N., LI M.C.A., LING C.H., MATSUBARA Y., MIYAZAKI S., MUNAKATA H., MURAKI Y., NAGAKANE M., OHNISHI K., RANC C., RATTENBURY N., SAITO T., SHARAN A., SULLIVAN D.J., SUMI T., SUZUKI D., TRISTRAM P.J., YAMADA T., YONEHARA A. (The MOA Collaboration)

Abstract (from CDS):

We present an analysis of the caustic-crossing binary microlensing event OGLE-2017-BLG-0039. Thanks to the very long duration of the event, with a time scale tE ∼ 130 days, the microlens parallax is measured precisely despite its low value of πE∼0.06. Analysis of the well-resolved caustic crossings during the source star's entrance and exit of the caustic yields an angular Einstein radius of θE∼0.6 mas. The measured πE and θE indicate that the lens is a binary composed of two stars with masses ∼1.0M☉ and ∼0.15 M☉, and is located at a distance of ∼6 kpc. From the color and brightness of the lens estimated from its determined mass and distance, it is expected that ∼2/3 of the I-band blended flux comes from the lens. Therefore, the event is a rare case of a bright lens event for which high-resolution follow-up observations can confirm its nature.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

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

Simbad objects: 21

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