OGLE-2014-BLG-0289: precise characterization of a quintuple-peak gravitational microlensing event

A. Udalski; C. Han; V. Bozza; A. Gould; I. A. Bond; P. Mróz; J. Skowron; Ł. Wyrzykowski; M. K. Szymański; I. Soszyński; K. Ulaczyk; R. Poleski; P. Pietrukowicz; S. Kozłowski; F. Abe; R. Barry; D. P. Bennett; A. Bhattacharya; M. Donachie; P. Evans; A. Fukui; Y. Hirao; Y. Itow; K. Kawasaki; N. Koshimoto; M. C. A. Li; C. H. Ling; K. Masuda; Y. Matsubara; S. Miyazaki; H. Munakata; Y. Muraki; M. Nagakane; K. Ohnishi; C. Ranc; N. Rattenbury; T. Saito; A. Sharan; D. J. Sullivan; T. Sumi; D. Suzuki; P. J. Tristram; T. Yamada; A. Yonehara; E. Bachelet; D. M. Bramich; G. DÁgo; M. Dominik; R. Figuera Jaimes; K. Horne; M. Hundertmark; N. Kains; J. Menzies; R. Schmidt; C. Snodgrass; I. A. Steele; J. Wambsganss; R. W. Pogge; Y. K. Jung; I. -G. Shin; J. C. Yee; W. -T. Kim; C. Beichman; S. Carey; S. Calchi Novati; W. Zhu

doi:10.3847/1538-4357/aaa295

OGLE-2014-BLG-0289: precise characterization of a quintuple-peak gravitational microlensing event

A. Udalski, C. Han, V. Bozza, A. Gould, I. A. Bond, P. Mróz, J. Skowron, Ł. Wyrzykowski, M. K. Szymański, I. Soszyński, K. Ulaczyk, R. Poleski, P. Pietrukowicz, S. Kozłowski, F. Abe, R. Barry, D. P. Bennett, A. Bhattacharya, M. Donachie, P. EvansA. Fukui, Y. Hirao, Y. Itow, K. Kawasaki, N. Koshimoto, M. C. A. Li, C. H. Ling, K. Masuda, Y. Matsubara, S. Miyazaki, H. Munakata, Y. Muraki, M. Nagakane, K. Ohnishi, C. Ranc, N. Rattenbury, T. Saito, A. Sharan, D. J. Sullivan, T. Sumi, D. Suzuki, P. J. Tristram, T. Yamada, A. Yonehara, E. Bachelet, D. M. Bramich, G. DÁgo, M. Dominik, R. Figuera Jaimes, K. Horne, M. Hundertmark, N. Kains, J. Menzies, R. Schmidt, C. Snodgrass, I. A. Steele, J. Wambsganss, R. W. Pogge, Y. K. Jung, I. -G. Shin, J. C. Yee, W. -T. Kim, C. Beichman, S. Carey, S. Calchi Novati, W. Zhu

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Abstract

We present the analysis of the binary-microlensing event OGLE-2014-BLG-0289. The event light curve exhibits five very unusual peaks, four of which were produced by caustic crossings and the other by a cusp approach. It is found that the quintuple-peak features of the light curve provide tight constraints on the source trajectory, enabling us to precisely and accurately measure the microlensing parallax π_E. Furthermore, the three resolved caustics allow us to measure the angular Einstein radius θ_E. From the combination of π_E and θ_E, the physical lens parameters are uniquely determined. It is found that the lens is a binary composed of two M dwarfs with masses M₁ = 0.52 ± 0.04 M⊙ and M₂ = 0.42 ± 0.03 M⊙ separated in projection by a_⊥ = 6.4 ± 0.5 au. The lens is located in the disk with a distance of D_L = 3.3 ± 0.3 kpc. The reason for the absence of a lensing signal in the Spitzer data is that the time of observation corresponds to the flat region of the light curve.

Original language	English
Article number	70
Number of pages	12
Journal	Astrophysical Journal
Volume	853
Issue number	1
DOIs	https://doi.org/10.3847/1538-4357/aaa295
Publication status	Published - 24 Jan 2018

Keywords

Binaries: general
Gravitational lensing: micro

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Udalski_2018_ApJ_853_70
© 2018, American Astronomical Society. This work has been made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at https://doi.org/10.3847/1538-4357/aaa295
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Udalski, A., Han, C., Bozza, V., Gould, A., Bond, I. A., Mróz, P., Skowron, J., Wyrzykowski, Ł., Szymański, M. K., Soszyński, I., Ulaczyk, K., Poleski, R., Pietrukowicz, P., Kozłowski, S., Abe, F., Barry, R., Bennett, D. P., Bhattacharya, A., Donachie, M., ... Zhu, W. (2018). OGLE-2014-BLG-0289: precise characterization of a quintuple-peak gravitational microlensing event. Astrophysical Journal, 853(1), Article 70. https://doi.org/10.3847/1538-4357/aaa295

@article{b7311db3048f4e17a8473d46bf3ae96f,

title = "OGLE-2014-BLG-0289: precise characterization of a quintuple-peak gravitational microlensing event",

abstract = "We present the analysis of the binary-microlensing event OGLE-2014-BLG-0289. The event light curve exhibits five very unusual peaks, four of which were produced by caustic crossings and the other by a cusp approach. It is found that the quintuple-peak features of the light curve provide tight constraints on the source trajectory, enabling us to precisely and accurately measure the microlensing parallax πE. Furthermore, the three resolved caustics allow us to measure the angular Einstein radius θE. From the combination of πE and θE, the physical lens parameters are uniquely determined. It is found that the lens is a binary composed of two M dwarfs with masses M1 = 0.52 ± 0.04 M⊙ and M2 = 0.42 ± 0.03 M⊙ separated in projection by a⊥ = 6.4 ± 0.5 au. The lens is located in the disk with a distance of DL = 3.3 ± 0.3 kpc. The reason for the absence of a lensing signal in the Spitzer data is that the time of observation corresponds to the flat region of the light curve.",

keywords = "Binaries: general, Gravitational lensing: micro",

author = "A. Udalski and C. Han and V. Bozza and A. Gould and Bond, {I. A.} and P. Mr{\'o}z and J. Skowron and {\L}. Wyrzykowski and Szyma{\'n}ski, {M. K.} and I. Soszy{\'n}ski and K. Ulaczyk and R. Poleski and P. Pietrukowicz and S. Koz{\l}owski and F. Abe and R. Barry and Bennett, {D. P.} and A. Bhattacharya and M. Donachie and P. Evans and A. Fukui and Y. Hirao and Y. Itow and K. Kawasaki and N. Koshimoto and Li, {M. C. A.} and Ling, {C. H.} and K. Masuda and Y. Matsubara and S. Miyazaki and H. Munakata and Y. Muraki and M. Nagakane and K. Ohnishi and C. Ranc and N. Rattenbury and T. Saito and A. Sharan and Sullivan, {D. J.} and T. Sumi and D. Suzuki and Tristram, {P. J.} and T. Yamada and A. Yonehara and E. Bachelet and Bramich, {D. M.} and G. D{\'A}go and M. Dominik and Jaimes, {R. Figuera} and K. Horne and M. Hundertmark and N. Kains and J. Menzies and R. Schmidt and C. Snodgrass and Steele, {I. A.} and J. Wambsganss and Pogge, {R. W.} and Jung, {Y. K.} and Shin, {I. -G.} and Yee, {J. C.} and Kim, {W. -T.} and C. Beichman and S. Carey and Novati, {S. Calchi} and W. Zhu",

year = "2018",

month = jan,

day = "24",

doi = "10.3847/1538-4357/aaa295",

language = "English",

volume = "853",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1",

}

Udalski, A, Han, C, Bozza, V, Gould, A, Bond, IA, Mróz, P, Skowron, J, Wyrzykowski, Ł, Szymański, MK, Soszyński, I, Ulaczyk, K, Poleski, R, Pietrukowicz, P, Kozłowski, S, Abe, F, Barry, R, Bennett, DP, Bhattacharya, A, Donachie, M, Evans, P, Fukui, A, Hirao, Y, Itow, Y, Kawasaki, K, Koshimoto, N, Li, MCA, Ling, CH, Masuda, K, Matsubara, Y, Miyazaki, S, Munakata, H, Muraki, Y, Nagakane, M, Ohnishi, K, Ranc, C, Rattenbury, N, Saito, T, Sharan, A, Sullivan, DJ, Sumi, T, Suzuki, D, Tristram, PJ, Yamada, T, Yonehara, A, Bachelet, E, Bramich, DM, DÁgo, G, Dominik, M, Jaimes, RF, Horne, K, Hundertmark, M, Kains, N, Menzies, J, Schmidt, R, Snodgrass, C, Steele, IA, Wambsganss, J, Pogge, RW, Jung, YK, Shin, I-G, Yee, JC, Kim, W-T, Beichman, C, Carey, S, Novati, SC & Zhu, W 2018, 'OGLE-2014-BLG-0289: precise characterization of a quintuple-peak gravitational microlensing event', Astrophysical Journal, vol. 853, no. 1, 70. https://doi.org/10.3847/1538-4357/aaa295

TY - JOUR

T1 - OGLE-2014-BLG-0289

T2 - precise characterization of a quintuple-peak gravitational microlensing event

AU - Udalski, A.

AU - Han, C.

AU - Bozza, V.

AU - Gould, A.

AU - Bond, I. A.

AU - Mróz, P.

AU - Skowron, J.

AU - Wyrzykowski, Ł.

AU - Szymański, M. K.

AU - Soszyński, I.

AU - Ulaczyk, K.

AU - Poleski, R.

AU - Pietrukowicz, P.

AU - Kozłowski, S.

AU - Abe, F.

AU - Barry, R.

AU - Bennett, D. P.

AU - Bhattacharya, A.

AU - Donachie, M.

AU - Evans, P.

AU - Fukui, A.

AU - Hirao, Y.

AU - Itow, Y.

AU - Kawasaki, K.

AU - Koshimoto, N.

AU - Li, M. C. A.

AU - Ling, C. H.

AU - Masuda, K.

AU - Matsubara, Y.

AU - Miyazaki, S.

AU - Munakata, H.

AU - Muraki, Y.

AU - Nagakane, M.

AU - Ohnishi, K.

AU - Ranc, C.

AU - Rattenbury, N.

AU - Saito, T.

AU - Sharan, A.

AU - Sullivan, D. J.

AU - Sumi, T.

AU - Suzuki, D.

AU - Tristram, P. J.

AU - Yamada, T.

AU - Yonehara, A.

AU - Bachelet, E.

AU - Bramich, D. M.

AU - DÁgo, G.

AU - Dominik, M.

AU - Jaimes, R. Figuera

AU - Horne, K.

AU - Hundertmark, M.

AU - Kains, N.

AU - Menzies, J.

AU - Schmidt, R.

AU - Snodgrass, C.

AU - Steele, I. A.

AU - Wambsganss, J.

AU - Pogge, R. W.

AU - Jung, Y. K.

AU - Shin, I. -G.

AU - Yee, J. C.

AU - Kim, W. -T.

AU - Beichman, C.

AU - Carey, S.

AU - Novati, S. Calchi

AU - Zhu, W.

PY - 2018/1/24

Y1 - 2018/1/24

N2 - We present the analysis of the binary-microlensing event OGLE-2014-BLG-0289. The event light curve exhibits five very unusual peaks, four of which were produced by caustic crossings and the other by a cusp approach. It is found that the quintuple-peak features of the light curve provide tight constraints on the source trajectory, enabling us to precisely and accurately measure the microlensing parallax πE. Furthermore, the three resolved caustics allow us to measure the angular Einstein radius θE. From the combination of πE and θE, the physical lens parameters are uniquely determined. It is found that the lens is a binary composed of two M dwarfs with masses M1 = 0.52 ± 0.04 M⊙ and M2 = 0.42 ± 0.03 M⊙ separated in projection by a⊥ = 6.4 ± 0.5 au. The lens is located in the disk with a distance of DL = 3.3 ± 0.3 kpc. The reason for the absence of a lensing signal in the Spitzer data is that the time of observation corresponds to the flat region of the light curve.

AB - We present the analysis of the binary-microlensing event OGLE-2014-BLG-0289. The event light curve exhibits five very unusual peaks, four of which were produced by caustic crossings and the other by a cusp approach. It is found that the quintuple-peak features of the light curve provide tight constraints on the source trajectory, enabling us to precisely and accurately measure the microlensing parallax πE. Furthermore, the three resolved caustics allow us to measure the angular Einstein radius θE. From the combination of πE and θE, the physical lens parameters are uniquely determined. It is found that the lens is a binary composed of two M dwarfs with masses M1 = 0.52 ± 0.04 M⊙ and M2 = 0.42 ± 0.03 M⊙ separated in projection by a⊥ = 6.4 ± 0.5 au. The lens is located in the disk with a distance of DL = 3.3 ± 0.3 kpc. The reason for the absence of a lensing signal in the Spitzer data is that the time of observation corresponds to the flat region of the light curve.

KW - Binaries: general

KW - Gravitational lensing: micro

U2 - 10.3847/1538-4357/aaa295

DO - 10.3847/1538-4357/aaa295

M3 - Article

SN - 0004-637X

VL - 853

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 70

ER -

OGLE-2014-BLG-0289: precise characterization of a quintuple-peak gravitational microlensing event

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Keywords

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