2017ApJ...849L..31Z

Query : 2017ApJ...849L..31Z

2017ApJ...849L..31Z - Astrophys. J., 849, L31-L31 (2017/November-2)

An isolated microlens observed from K2, Spitzer, and Earth.

ZHU W., UDALSKI A., HUANG C.X., CALCHI NOVATI S., SUMI T., POLESKI R., SKOWRON J., MROZ P., SZYMANSKI M.K., SOSZYNSKI I., PIETRUKOWICZ P., KOZLOWSKI S., ULACZYK K., PAWLAK M. (The OGLE Collaboration), BEICHMAN C., BRYDEN G., CAREY S., GAUDI B.S., GOULD A., HENDERSON C.B., SHVARTZVALD Y., YEE J.C. (The Spitzer Team), BOND I.A., BENNETT D.P., SUZUKI D., RATTENBURY N.J., KOSHIMOTO N., ABE F., ASAKURA Y., BARRY R.K., BHATTACHARYA A., DONACHIE M., EVANS P., FUKUI A., HIRAO Y., ITOW Y., KAWASAKI K., LI M.C.A., LING C.H., MASUDA K., MATSUBARA Y., MIYAZAKI S., MUNAKATA H., MURAKI Y., NAGAKANE M., OHNISHI K., RANC C., SAITO T., SHARAN A., SULLIVAN D.J., TRISTRAM P.J., YAMADA T., YONEHARA A. (The MOA Collaboration)

Abstract (from CDS):

We present the result of microlensing event MOA-2016-BLG-290, which received observations from the two-wheel Kepler (K2), Spitzer, as well as ground-based observatories. A joint analysis of data from K2 and the ground leads to two degenerate solutions of the lens mass and distance. This degeneracy is effectively broken once the (partial) Spitzer light curve is included. Altogether, the lens is found to be an extremely low-mass star or brown dwarf (77–23+34 MJ) located in the Galactic bulge (6.8±0.4 kpc). MOA-2016-BLG-290 is the first microlensing event for which we have signals from three well-separated (∼1 au) locations. It demonstrates the power of two-satellite microlensing experiment in reducing the ambiguity of lens properties, as pointed out independently by S. Refsdal and A. Gould several decades ago.

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

Journal keyword(s): gravitational lensing: micro - methods: data analysis - parallaxes - stars: fundamental parameters - techniques: photometric - techniques: photometric

Simbad objects: 6

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Number of rows : 6
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-2015-BLG-1319 * 17 57 46.40 -32 28 19.9           ~ 9 0
2 MOA 2016-BLG-383 * 17 58 52.30 -27 36 48.8           ~ 14 0
3 OGLE BLG-LPV-202211 LP* 18 04 56.4001936272 -28 37 46.247031228     15.614   12.647 ~ 2 0
4 MOA 2016-BLG-290 * 18 04 56.990 -28 37 40.35           ~ 4 0
5 OGLE-2016-BLG-0975 * 18 04 57.01 -28 37 40.1           ~ 2 0
6 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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