Candidate gravitational microlensing events for future direct lens imaging

C. B. Henderson, H. Park, T. Sumi, A. Udalski, A. Gould, Y. Tsapras, C. Han, B. S. Gaudi, V. Bozza, F. Abe, D. P. Bennett, I. A. Bond, C. S. Botzler, M. Freeman, A. Fukui, D. Fukunaga, Y. Itow, N. Koshimoto, C. H. Ling, K. Masuda & 59 others Y. Matsubara, Y. Muraki, S. Namba, K. Ohnishi, N. J. Rattenbury, To Saito, D. J. Sullivan, D. Suzuki, W. L. Sweatman, P. J. Tristram, N. Tsurumi, K. Wada, N. Yamai, P. C M Yock, A. Yonehara, M. K. Szymański, M. Kubiak, G. Pietrzyński, I. Soszyński, J. Skowron, S. Kozłowski, R. Poleski, K. Ulaczyk, [No Value] Wyrzykowski, P. Pietrukowicz, L. A. Almeida, M. Bos, J. Y. Choi, G. W. Christie, D. L. Depoy, S. Dong, M. Friedmann, K. H. Hwang, F. Jablonski, Y. K. Jung, S. Kaspi, C. U. Lee, D. Maoz, J. McCormick, D. Moorhouse, T. Natusch, H. Ngan, R. W. Pogge, I. G. Shin, Y. Shvartzvald, T. G. Tan, G. Thornley, J. C. Yee, A. Allan, D. M. Bramich, P. Browne, M. Dominik, K. Horne, M. Hundertmark, R. Figuera Jaimes, N. Kains, C. Snodgrass, I. A. Steele, R. A. Street

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The mass of the lenses giving rise to Galactic microlensing events can be constrained by measuring the relative lens-source proper motion and lens flux. The flux of the lens can be separated from that of the source, companions to the source, and unrelated nearby stars with high-resolution images taken when the lens and source are spatially resolved. For typical ground-based adaptive optics (AO) or space-based observations, this requires either inordinately long time baselines or high relative proper motions. We provide a list of microlensing events toward the Galactic bulge with high relative lens-source proper motion that are therefore good candidates for constraining the lens mass with future high-resolution imaging. We investigate all events from 2004 to 2013 that display detectable finite-source effects, a feature that allows us to measure the proper motion. In total, we present 20 events with μ ≳ 8 mas yr-1. Of these, 14 were culled from previous analyses while 6 are new, including OGLE-2004-BLG-368, MOA-2005-BLG-36, OGLE-2012-BLG-0211, OGLE-2012-BLG-0456, MOA-2012-BLG-532, and MOA-2013-BLG-029. In ≲12 yr from the time of each event the lens and source of each event will be sufficiently separated for ground-based telescopes with AO systems or space telescopes to resolve each component and further characterize the lens system. Furthermore, for the most recent events, comparison of the lens flux estimates from images taken immediately to those estimated from images taken when the lens and source are resolved can be used to empirically check the robustness of the single-epoch method currently being used to estimate lens masses for many events.

Original languageEnglish
Article number71
JournalAstrophysical Journal
Volume794
Issue number1
DOIs
Publication statusPublished - 10 Oct 2014

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lenses
proper motion
image resolution
adaptive optics
telescopes
galactic bulge
high resolution
estimates
lists
time measurement
stars
effect
method
comparison
measuring

Keywords

  • binaries: generalgravitational lensing: micro

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Henderson, C. B., Park, H., Sumi, T., Udalski, A., Gould, A., Tsapras, Y., ... Street, R. A. (2014). Candidate gravitational microlensing events for future direct lens imaging. Astrophysical Journal, 794(1), [71]. https://doi.org/10.1088/0004-637X/794/1/71

Candidate gravitational microlensing events for future direct lens imaging. / Henderson, C. B.; Park, H.; Sumi, T.; Udalski, A.; Gould, A.; Tsapras, Y.; Han, C.; Gaudi, B. S.; Bozza, V.; Abe, F.; Bennett, D. P.; Bond, I. A.; Botzler, C. S.; Freeman, M.; Fukui, A.; Fukunaga, D.; Itow, Y.; Koshimoto, N.; Ling, C. H.; Masuda, K.; Matsubara, Y.; Muraki, Y.; Namba, S.; Ohnishi, K.; Rattenbury, N. J.; Saito, To; Sullivan, D. J.; Suzuki, D.; Sweatman, W. L.; Tristram, P. J.; Tsurumi, N.; Wada, K.; Yamai, N.; Yock, P. C M; Yonehara, A.; Szymański, M. K.; Kubiak, M.; Pietrzyński, G.; Soszyński, I.; Skowron, J.; Kozłowski, S.; Poleski, R.; Ulaczyk, K.; Wyrzykowski, [No Value]; Pietrukowicz, P.; Almeida, L. A.; Bos, M.; Choi, J. Y.; Christie, G. W.; Depoy, D. L.; Dong, S.; Friedmann, M.; Hwang, K. H.; Jablonski, F.; Jung, Y. K.; Kaspi, S.; Lee, C. U.; Maoz, D.; McCormick, J.; Moorhouse, D.; Natusch, T.; Ngan, H.; Pogge, R. W.; Shin, I. G.; Shvartzvald, Y.; Tan, T. G.; Thornley, G.; Yee, J. C.; Allan, A.; Bramich, D. M.; Browne, P.; Dominik, M.; Horne, K.; Hundertmark, M.; Jaimes, R. Figuera; Kains, N.; Snodgrass, C.; Steele, I. A.; Street, R. A.

In: Astrophysical Journal, Vol. 794, No. 1, 71, 10.10.2014.

Research output: Contribution to journalArticle

Henderson, CB, Park, H, Sumi, T, Udalski, A, Gould, A, Tsapras, Y, Han, C, Gaudi, BS, Bozza, V, Abe, F, Bennett, DP, Bond, IA, Botzler, CS, Freeman, M, Fukui, A, Fukunaga, D, Itow, Y, Koshimoto, N, Ling, CH, Masuda, K, Matsubara, Y, Muraki, Y, Namba, S, Ohnishi, K, Rattenbury, NJ, Saito, T, Sullivan, DJ, Suzuki, D, Sweatman, WL, Tristram, PJ, Tsurumi, N, Wada, K, Yamai, N, Yock, PCM, Yonehara, A, Szymański, MK, Kubiak, M, Pietrzyński, G, Soszyński, I, Skowron, J, Kozłowski, S, Poleski, R, Ulaczyk, K, Wyrzykowski, NV, Pietrukowicz, P, Almeida, LA, Bos, M, Choi, JY, Christie, GW, Depoy, DL, Dong, S, Friedmann, M, Hwang, KH, Jablonski, F, Jung, YK, Kaspi, S, Lee, CU, Maoz, D, McCormick, J, Moorhouse, D, Natusch, T, Ngan, H, Pogge, RW, Shin, IG, Shvartzvald, Y, Tan, TG, Thornley, G, Yee, JC, Allan, A, Bramich, DM, Browne, P, Dominik, M, Horne, K, Hundertmark, M, Jaimes, RF, Kains, N, Snodgrass, C, Steele, IA & Street, RA 2014, 'Candidate gravitational microlensing events for future direct lens imaging', Astrophysical Journal, vol. 794, no. 1, 71. https://doi.org/10.1088/0004-637X/794/1/71
Henderson CB, Park H, Sumi T, Udalski A, Gould A, Tsapras Y et al. Candidate gravitational microlensing events for future direct lens imaging. Astrophysical Journal. 2014 Oct 10;794(1). 71. https://doi.org/10.1088/0004-637X/794/1/71
Henderson, C. B. ; Park, H. ; Sumi, T. ; Udalski, A. ; Gould, A. ; Tsapras, Y. ; Han, C. ; Gaudi, B. S. ; Bozza, V. ; Abe, F. ; Bennett, D. P. ; Bond, I. A. ; Botzler, C. S. ; Freeman, M. ; Fukui, A. ; Fukunaga, D. ; Itow, Y. ; Koshimoto, N. ; Ling, C. H. ; Masuda, K. ; Matsubara, Y. ; Muraki, Y. ; Namba, S. ; Ohnishi, K. ; Rattenbury, N. J. ; Saito, To ; Sullivan, D. J. ; Suzuki, D. ; Sweatman, W. L. ; Tristram, P. J. ; Tsurumi, N. ; Wada, K. ; Yamai, N. ; Yock, P. C M ; Yonehara, A. ; Szymański, M. K. ; Kubiak, M. ; Pietrzyński, G. ; Soszyński, I. ; Skowron, J. ; Kozłowski, S. ; Poleski, R. ; Ulaczyk, K. ; Wyrzykowski, [No Value] ; Pietrukowicz, P. ; Almeida, L. A. ; Bos, M. ; Choi, J. Y. ; Christie, G. W. ; Depoy, D. L. ; Dong, S. ; Friedmann, M. ; Hwang, K. H. ; Jablonski, F. ; Jung, Y. K. ; Kaspi, S. ; Lee, C. U. ; Maoz, D. ; McCormick, J. ; Moorhouse, D. ; Natusch, T. ; Ngan, H. ; Pogge, R. W. ; Shin, I. G. ; Shvartzvald, Y. ; Tan, T. G. ; Thornley, G. ; Yee, J. C. ; Allan, A. ; Bramich, D. M. ; Browne, P. ; Dominik, M. ; Horne, K. ; Hundertmark, M. ; Jaimes, R. Figuera ; Kains, N. ; Snodgrass, C. ; Steele, I. A. ; Street, R. A. / Candidate gravitational microlensing events for future direct lens imaging. In: Astrophysical Journal. 2014 ; Vol. 794, No. 1.
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title = "Candidate gravitational microlensing events for future direct lens imaging",
abstract = "The mass of the lenses giving rise to Galactic microlensing events can be constrained by measuring the relative lens-source proper motion and lens flux. The flux of the lens can be separated from that of the source, companions to the source, and unrelated nearby stars with high-resolution images taken when the lens and source are spatially resolved. For typical ground-based adaptive optics (AO) or space-based observations, this requires either inordinately long time baselines or high relative proper motions. We provide a list of microlensing events toward the Galactic bulge with high relative lens-source proper motion that are therefore good candidates for constraining the lens mass with future high-resolution imaging. We investigate all events from 2004 to 2013 that display detectable finite-source effects, a feature that allows us to measure the proper motion. In total, we present 20 events with μ ≳ 8 mas yr-1. Of these, 14 were culled from previous analyses while 6 are new, including OGLE-2004-BLG-368, MOA-2005-BLG-36, OGLE-2012-BLG-0211, OGLE-2012-BLG-0456, MOA-2012-BLG-532, and MOA-2013-BLG-029. In ≲12 yr from the time of each event the lens and source of each event will be sufficiently separated for ground-based telescopes with AO systems or space telescopes to resolve each component and further characterize the lens system. Furthermore, for the most recent events, comparison of the lens flux estimates from images taken immediately to those estimated from images taken when the lens and source are resolved can be used to empirically check the robustness of the single-epoch method currently being used to estimate lens masses for many events.",
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author = "Henderson, {C. B.} and H. Park and T. Sumi and A. Udalski and A. Gould and Y. Tsapras and C. Han and Gaudi, {B. S.} and V. Bozza and F. Abe and Bennett, {D. P.} and Bond, {I. A.} and Botzler, {C. S.} and M. Freeman and A. Fukui and D. Fukunaga and Y. Itow and N. Koshimoto and Ling, {C. H.} and K. Masuda and Y. Matsubara and Y. Muraki and S. Namba and K. Ohnishi and Rattenbury, {N. J.} and To Saito and Sullivan, {D. J.} and D. Suzuki and Sweatman, {W. L.} and Tristram, {P. J.} and N. Tsurumi and K. Wada and N. Yamai and Yock, {P. C M} and A. Yonehara and Szymański, {M. K.} and M. Kubiak and G. Pietrzyński and I. Soszyński and J. Skowron and S. Kozłowski and R. Poleski and K. Ulaczyk and Wyrzykowski, {[No Value]} and P. Pietrukowicz and Almeida, {L. A.} and M. Bos and Choi, {J. Y.} and Christie, {G. W.} and Depoy, {D. L.} and S. Dong and M. Friedmann and Hwang, {K. H.} and F. Jablonski and Jung, {Y. K.} and S. Kaspi and Lee, {C. U.} and D. Maoz and J. McCormick and D. Moorhouse and T. Natusch and H. Ngan and Pogge, {R. W.} and Shin, {I. G.} and Y. Shvartzvald and Tan, {T. G.} and G. Thornley and Yee, {J. C.} and A. Allan and Bramich, {D. M.} and P. Browne and M. Dominik and K. Horne and M. Hundertmark and Jaimes, {R. Figuera} and N. Kains and C. Snodgrass and Steele, {I. A.} and Street, {R. A.}",
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TY - JOUR

T1 - Candidate gravitational microlensing events for future direct lens imaging

AU - Henderson, C. B.

AU - Park, H.

AU - Sumi, T.

AU - Udalski, A.

AU - Gould, A.

AU - Tsapras, Y.

AU - Han, C.

AU - Gaudi, B. S.

AU - Bozza, V.

AU - Abe, F.

AU - Bennett, D. P.

AU - Bond, I. A.

AU - Botzler, C. S.

AU - Freeman, M.

AU - Fukui, A.

AU - Fukunaga, D.

AU - Itow, Y.

AU - Koshimoto, N.

AU - Ling, C. H.

AU - Masuda, K.

AU - Matsubara, Y.

AU - Muraki, Y.

AU - Namba, S.

AU - Ohnishi, K.

AU - Rattenbury, N. J.

AU - Saito, To

AU - Sullivan, D. J.

AU - Suzuki, D.

AU - Sweatman, W. L.

AU - Tristram, P. J.

AU - Tsurumi, N.

AU - Wada, K.

AU - Yamai, N.

AU - Yock, P. C M

AU - Yonehara, A.

AU - Szymański, M. K.

AU - Kubiak, M.

AU - Pietrzyński, G.

AU - Soszyński, I.

AU - Skowron, J.

AU - Kozłowski, S.

AU - Poleski, R.

AU - Ulaczyk, K.

AU - Wyrzykowski, [No Value]

AU - Pietrukowicz, P.

AU - Almeida, L. A.

AU - Bos, M.

AU - Choi, J. Y.

AU - Christie, G. W.

AU - Depoy, D. L.

AU - Dong, S.

AU - Friedmann, M.

AU - Hwang, K. H.

AU - Jablonski, F.

AU - Jung, Y. K.

AU - Kaspi, S.

AU - Lee, C. U.

AU - Maoz, D.

AU - McCormick, J.

AU - Moorhouse, D.

AU - Natusch, T.

AU - Ngan, H.

AU - Pogge, R. W.

AU - Shin, I. G.

AU - Shvartzvald, Y.

AU - Tan, T. G.

AU - Thornley, G.

AU - Yee, J. C.

AU - Allan, A.

AU - Bramich, D. M.

AU - Browne, P.

AU - Dominik, M.

AU - Horne, K.

AU - Hundertmark, M.

AU - Jaimes, R. Figuera

AU - Kains, N.

AU - Snodgrass, C.

AU - Steele, I. A.

AU - Street, R. A.

PY - 2014/10/10

Y1 - 2014/10/10

N2 - The mass of the lenses giving rise to Galactic microlensing events can be constrained by measuring the relative lens-source proper motion and lens flux. The flux of the lens can be separated from that of the source, companions to the source, and unrelated nearby stars with high-resolution images taken when the lens and source are spatially resolved. For typical ground-based adaptive optics (AO) or space-based observations, this requires either inordinately long time baselines or high relative proper motions. We provide a list of microlensing events toward the Galactic bulge with high relative lens-source proper motion that are therefore good candidates for constraining the lens mass with future high-resolution imaging. We investigate all events from 2004 to 2013 that display detectable finite-source effects, a feature that allows us to measure the proper motion. In total, we present 20 events with μ ≳ 8 mas yr-1. Of these, 14 were culled from previous analyses while 6 are new, including OGLE-2004-BLG-368, MOA-2005-BLG-36, OGLE-2012-BLG-0211, OGLE-2012-BLG-0456, MOA-2012-BLG-532, and MOA-2013-BLG-029. In ≲12 yr from the time of each event the lens and source of each event will be sufficiently separated for ground-based telescopes with AO systems or space telescopes to resolve each component and further characterize the lens system. Furthermore, for the most recent events, comparison of the lens flux estimates from images taken immediately to those estimated from images taken when the lens and source are resolved can be used to empirically check the robustness of the single-epoch method currently being used to estimate lens masses for many events.

AB - The mass of the lenses giving rise to Galactic microlensing events can be constrained by measuring the relative lens-source proper motion and lens flux. The flux of the lens can be separated from that of the source, companions to the source, and unrelated nearby stars with high-resolution images taken when the lens and source are spatially resolved. For typical ground-based adaptive optics (AO) or space-based observations, this requires either inordinately long time baselines or high relative proper motions. We provide a list of microlensing events toward the Galactic bulge with high relative lens-source proper motion that are therefore good candidates for constraining the lens mass with future high-resolution imaging. We investigate all events from 2004 to 2013 that display detectable finite-source effects, a feature that allows us to measure the proper motion. In total, we present 20 events with μ ≳ 8 mas yr-1. Of these, 14 were culled from previous analyses while 6 are new, including OGLE-2004-BLG-368, MOA-2005-BLG-36, OGLE-2012-BLG-0211, OGLE-2012-BLG-0456, MOA-2012-BLG-532, and MOA-2013-BLG-029. In ≲12 yr from the time of each event the lens and source of each event will be sufficiently separated for ground-based telescopes with AO systems or space telescopes to resolve each component and further characterize the lens system. Furthermore, for the most recent events, comparison of the lens flux estimates from images taken immediately to those estimated from images taken when the lens and source are resolved can be used to empirically check the robustness of the single-epoch method currently being used to estimate lens masses for many events.

KW - binaries: generalgravitational lensing: micro

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