2019MNRAS.487.4603T

Query : 2019MNRAS.487.4603T

2019MNRAS.487.4603T - Mon. Not. R. Astron. Soc., 487, 4603-4614 (2019/August-3)

An analysis of binary microlensing event OGLE-2015-BLG-0060.

TSAPRAS Y., CASSAN A., RANC C., BACHELET E., STREET R., UDALSKI A., HUNDERTMARK M., BOZZA V., BEAULIEU J.P., MARQUETTE J.B., EUTENEUER E., BRAMICH D.M., DOMINIK M., FIGUERA JAIMES R., HORNE K., MAO S., MENZIES J., SCHMIDT R., SNODGRASS C., STEELE I.A., WAMBSGANSS J., MROZ P., SZYMANSKI M.K., SOSZYNSKI I., SKOWRON J., PIETRUKOWICZ P., KOZLOWSKI S., POLESKI R., ULACZYK K., PAWLAK M., JORGENSEN U.G., SKOTTFELT J., POPOVAS A., CICERI S., KORHONEN H., KUFFMEIER M., EVANS D.F., PEIXINHO N., HINSE T.C., BURGDORF M.J., SOUTHWORTH J., TRONSGAARD R., KERINS E., ANDERSEN M.I., RAHVAR S., WANG Y., WERTZ O., RABUS M., CALCHI NOVATI S., D'AGO G., SCARPETTA G., MANCINI L., ABE F., ASAKURA Y., 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., MASUDA K., MATSUBARA Y., MURAKI Y., MIYAZAKI S., NAGAKANE M., OHNISHI K., RATTENBURY N., SAITO T., SHARAN A., SHIBAI H., SULLIVAN D.J., SUMI T., SUZUKI D., TRISTRAM P.J., YAMADA T., YONEHARA A., BRAMICH D.M., BRAMICH D.M., DOMINIK M., JAIMES R.F., HORNE K., MAO S., MENZIES J., SCHMIDT R., SNODGRASS C., STEELE I.A., WAMBSGANSS J., MROZ P., MROZ P., SZYMANSKI M.K., SOSZYNSKI I., SKOWRON J., PIETRUKOWICZ P., KOZLOWSKI S., POLESKI R., ULACZYK K., PAWLAK M., JORGENSEN U.G., JORGENSEN U.G., SKOTTFELT J., POPOVAS A., CICERI S., KORHONEN H., KUFFMEIER M., EVANS D.F., PEIXINHO N., HINSE T.C., BURGDORF M.J., SOUTHWORTH J., TRONSGAARD R., KERINS E., ANDERSEN M.I., RAHVAR S., WANG Y., WERTZ O., RABUS M., NOVATI S.C., D'AGO G., SCARPETTA G., MANCINI L., ABE F., ABE F., ASAKURA Y., 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., MASUDA K., MATSUBARA Y., MURAKI Y., MIYAZAKI S., NAGAKANE M., OHNISHI K., RATTENBURY N., SAITO T., SHARAN A., SHIBAI H., SULLIVAN D.J., SUMI T., SUZUKI D., TRISTRAM P.J., YAMADA T. and YONEHARA A.

Abstract (from CDS):

We present the analysis of stellar binary microlensing event OGLE-2015-BLG-0060 based on observations obtained from 13 different telescopes. Intensive coverage of the anomalous parts of the light curve was achieved by automated follow-up observations from the robotic telescopes of the Las Cumbres Observatory. We show that, for the first time, all main features of an anomalous microlensing event are well covered by follow-up data, allowing us to estimate the physical parameters of the lens. The strong detection of second-order effects in the event light curve necessitates the inclusion of longer-baseline survey data in order to constrain the parallax vector. We find that the event was most likely caused by a stellar binary-lens with masses M_*1_ = 0.87 ±0.12 M☉ and M_*2_ = 0.77 ±0.11 M☉. The distance to the lensing system is 6.41 ± 0.14 kpc and the projected separation between the two components is 13.85 ± 0.16 au. Alternative interpretations are also considered.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): gravitational lensing: micro - methods: observational - techniques: photometric - Galaxy: bulge

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 TCP J05074264+2447555 * 05 07 42.7246306560 +24 47 56.378307624   14.99 14.09 13.97   F5 26 0
2 MOA 2015-BLG-281 BD? 17 55 01.020 -29 02 49.60           ~ 20 0
3 OGLE-2015-BLG-0060 * 17 59 58.35 -27 46 51.4           ~ 3 0
4 NAME Galactic Bulge reg ~ ~           ~ 4297 0

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