2019AJ....157..215S

Query : 2019AJ....157..215S

2019AJ....157..215S - Astron. J., 157, 215-215 (2019/June-0)

OGLE-2018-BLG-0022: a nearby M-dwarf binary.

STREET R.A., BACHELET E., TSAPRAS Y., HUNDERTMARK M.P.G., BOZZA V., DOMINIK M., BRAMICH D.M., CASSAN A., HORNE K., MAO S., SAHA A., WAMBSGANSS J., ZANG W. (The MiNDSTEp Team), JORGENSEN U.G., LONGA-PENA P., PEIXINHO N., SAJADIAN S., BURGDORF M.J., CAMPBELL-WHITE J., DIB S., EVANS D.F., FUJII Y.I., HINSE T.C., KHALOUEI E., LOWRY S., RAHVAR S., RABUS M., SKOTTFELT J., SNODGRASS C., SOUTHWORTH J. and TREGLOAN-REED J.

Abstract (from CDS):

We report observations of the binary microlensing event OGLE-2018-BLG-0022, provided by the Robotic Observations of Microlensing Events (ROME)/Reactive Event Assessment (REA) Survey, which indicate that the lens is a low-mass binary star consisting of M3 (0.375 ± 0.020 M☉) and M7 (0.098 ± 0.005 M☉) components. The lens is unusually close, at 0.998 ± 0.047 kpc, compared with the majority of microlensing events, and despite its intrinsically low luminosity, it is likely that adaptive optics observations in the near future will be able to provide an independent confirmation of the lens masses.

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

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

Simbad objects: 3

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Number of rows : 3
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-2018-BLG-0022 * 17 59 27.04 -28 36 37.0           ~ 5 0
2 NAME Galactic Bar reg ~ ~           ~ 1458 0
3 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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