2018ApJ...867..136H

Query : 2018ApJ...867..136H

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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Number of rows : 21
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 EGGR 180 WD* 04 31 12.5714396826 +58 58 41.292707803 12.29 12.77   12.8   DC5 140 0
2 MACHO LMC 5 * 05 16 41.1 -70 29 18     21.15     ~ 62 1
3 NAME Proxima Centauri PM* 14 29 42.9461331854 -62 40 46.164680672 14.21 12.95 11.13 9.45 7.41 M5.5Ve 1483 0
4 OGLE BLG613.9 20182 * 17 32 23.41 -29 18 09.7           ~ 11 0
5 OGLE-2012-BLG-0026 * 17 34 18.7004610096 -27 08 33.867112596           ~ 55 1
6 OGLE BLG609.25 33013 * 17 36 51.1949070168 -34 32 39.643428912           ~ 6 0
7 OGLE-2017-BLG-0896 * 17 39 30.98 -27 17 51.1           ~ 11 0
8 OGLE BLG652.4 816 * 17 41 12.6506458440 -26 44 28.213264824           ~ 3 0
9 OGLE-2005-BLG-071 * 17 50 09.77 -34 40 23.5           ~ 62 1
10 OGLE-2015-BLG-1482 * 17 50 31.330 -30 53 19.30           ~ 10 0
11 OGLE-2006-BLG-109 * 17 52 34.55 -30 05 15.7     19.035   16.643 ~ 94 2
12 OGLE-2015-BLG-1268 BD? 17 56 49.77 -21 53 57.6           ~ 10 0
13 OGLE BLG645.4 72015 * 17 57 23.56 -27 13 13.3           ~ 4 0
14 OGLE BLG-LPV-153890 LP* 17 58 46.95288 -27 39 03.8376     17.714   14.125 ~ 7 0
15 OGLE BLG515.16 96654 * 18 00 13.93 -32 23 09.7           ~ 2 0
16 MOA 2017-BLG-80 * 18 01 47.940 -27 20 34.29           ~ 1 0
17 OGLE-2017-BLG-0039 * 18 01 47.95 -27 20 34.7           ~ 4 0
18 MACHO 95-BLG-37 * 18 04 34.44 -28 25 33.7           ~ 6 0
19 MOA 2003-BLG-53 * 18 05 16.35 -28 53 42.0           GIV 59 1
20 OGLE-2005-BLG-169 * 18 06 05.32 -30 43 57.5     20.4     ~ 68 1
21 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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