Reanalyses of anomalous gravitational microlensing events in the OGLE-III early warning system database with combined data

J. Jeong; H. Park; C. Han; A. Gould; A. Udalski; M. K. Szymański; G. Pietrzyński; I. Soszyński; R. Poleski; K. Ulaczyk; Ł. Wyrzykowski; F. Abe; D. P. Bennett; I. A. Bond; C. S. Botzler; M. Freeman; A. Fukui; D. Fukunaga; Y. Itow; N. Koshimoto; K. Masuda; Y. Matsubara; Y. Muraki; S. Namba; K. Ohnishi; N. J. Rattenbury; To. Saito; D. J. Sullivan; W. L. Sweatman; T. Sumi; D. Suzuki; P. J. Tristram; N. Tsurumi; K. Wada; N. Yamai; P. C. M. Yock; A. Yonehara; M. D. Albrow; V. Batista; J.-P. Beaulieu; J. A. R. Caldwell; A. Cassan; A. Cole; C. Coutures; S. Dieters; M. Dominik; D. Dominis Prester; J. Donatowicz; P. Fouqué; J. Greenhill; M. Hoffman; M. Huber; U. G. Jørgensen; S. R. Kane; D. Kubas; R. Martin; J.-B. Marquette; J. Menzies; C. Pitrou; K. Pollard; K. C. Sahu; C. Vinter; J. Wambsganss; A. Williams; W. Allen; G. Bolt; J.-Y. Choi; G. W. Christie; D. L. DePoy; J. Drummond; B. S. Gaudi; K.-H. Hwang; Y. K. Jung; C.-U. Lee; F. Mallia; D. Maoz; A. Maury; J. McCormick; L. A. G. Monard; D. Moorhouse; T. Natusch; E. O. Ofek; B.-G. Park; R. W. Pogge; R. Santallo; I.-G. Shin; G. Thornley; J. C. Yee; D. M. Bramich; M. Burgdorf; K. Horne; M. Hundertmark; N. Kains; C. Snodgrass; I. Steele; R. Street; Y. Tsapras

doi:10.1088/0004-637X/804/1/38

Reanalyses of anomalous gravitational microlensing events in the OGLE-III early warning system database with combined data

J. Jeong, H. Park, C. Han, A. Gould, A. Udalski, M. K. Szymański, G. Pietrzyński, I. Soszyński, R. Poleski, K. Ulaczyk, Ł. Wyrzykowski, F. Abe, D. P. Bennett, I. A. Bond, C. S. Botzler, M. Freeman, A. Fukui, D. Fukunaga, Y. Itow, N. KoshimotoK. Masuda, Y. Matsubara, Y. Muraki, S. Namba, K. Ohnishi, N. J. Rattenbury, To. Saito, D. J. Sullivan, W. L. Sweatman, T. Sumi, D. Suzuki, P. J. Tristram, N. Tsurumi, K. Wada, N. Yamai, P. C. M. Yock, A. Yonehara, M. D. Albrow, V. Batista, J.-P. Beaulieu, J. A. R. Caldwell, A. Cassan, A. Cole, C. Coutures, S. Dieters, M. Dominik, D. Dominis Prester, J. Donatowicz, P. Fouqué, J. Greenhill, M. Hoffman, M. Huber, U. G. Jørgensen, S. R. Kane, D. Kubas, R. Martin, J.-B. Marquette, J. Menzies, C. Pitrou, K. Pollard, K. C. Sahu, C. Vinter, J. Wambsganss, A. Williams, W. Allen, G. Bolt, J.-Y. Choi, G. W. Christie, D. L. DePoy, J. Drummond, B. S. Gaudi, K.-H. Hwang, Y. K. Jung, C.-U. Lee, F. Mallia, D. Maoz, A. Maury, J. McCormick, L. A. G. Monard, D. Moorhouse, T. Natusch, E. O. Ofek, B.-G. Park, R. W. Pogge, R. Santallo, I.-G. Shin, G. Thornley, J. C. Yee, D. M. Bramich, M. Burgdorf, K. Horne, M. Hundertmark, N. Kains, C. Snodgrass, I. Steele, R. Street, Y. Tsapras

School of Physics and Astronomy

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Abstract

We reanalyze microlensing events in the published list of anomalous events that were observed from the Optical Gravitational Lensing Experiment (OGLE) lensing survey conducted during the 2004–2008 period. In order to check the existence of possible degenerate solutions and extract extra information, we conduct analyses based on combined data from other survey and follow-up observation and consider higher-order effects. Among the analyzed events, we present analyses of eight events for which either new solutions are identified or additional information is obtained. We find that the previous binary-source interpretations of five events are better interpreted by binary-lens models. These events include OGLE-2006-BLG-238, OGLE-2007-BLG-159, OGLE-2007-BLG-491, OGLE-2008-BLG-143, and OGLE-2008-BLG-210. With additional data covering caustic crossings, we detect finite-source effects for six events including OGLE-2006-BLG-215, OGLE-2006-BLG-238, OGLE-2006-BLG-450, OGLE-2008-BLG-143, OGLE-2008-BLG-210, and OGLE-2008-BLG-513. Among them, we are able to measure the Einstein radii of three events for which multi-band data are available. These events are OGLE-2006-BLG-238, OGLE-2008-BLG-210, and OGLE-2008-BLG-513. For OGLE-2008-BLG-143, we detect higher-order effects induced by the changes of the observer's position caused by the orbital motion of the Earth around the Sun. In addition, we present degenerate solutions resulting from the known close/wide or ecliptic degeneracy. Finally, we note that the masses of the binary companions of the lenses of OGLE-2006-BLG-450 and OGLE-2008-BLG-210 are in the brown-dwarf regime.

Original language	English
Journal	Astrophysical Journal
Volume	804
Issue number	1
Early online date	28 Apr 2015
DOIs	https://doi.org/10.1088/0004-637X/804/1/38
Publication status	Published - 1 May 2015

Keywords

Binaries: close
Gravitational lensing: micro

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10.1088/0004-637X/804/1/38

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© 2015. The American Astronomical Society. All rights reserved.
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Jeong, J., Park, H., Han, C., Gould, A., Udalski, A., Szymański, M. K., Pietrzyński, G., Soszyński, I., Poleski, R., Ulaczyk, K., Wyrzykowski, Ł., Abe, F., Bennett, D. P., Bond, I. A., Botzler, C. S., Freeman, M., Fukui, A., Fukunaga, D., Itow, Y., ... Tsapras, Y. (2015). Reanalyses of anomalous gravitational microlensing events in the OGLE-III early warning system database with combined data. Astrophysical Journal, 804(1). https://doi.org/10.1088/0004-637X/804/1/38

@article{7833dc47d6674a54920a29d3e2f2ea4d,

title = "Reanalyses of anomalous gravitational microlensing events in the OGLE-III early warning system database with combined data",

abstract = "We reanalyze microlensing events in the published list of anomalous events that were observed from the Optical Gravitational Lensing Experiment (OGLE) lensing survey conducted during the 2004–2008 period. In order to check the existence of possible degenerate solutions and extract extra information, we conduct analyses based on combined data from other survey and follow-up observation and consider higher-order effects. Among the analyzed events, we present analyses of eight events for which either new solutions are identified or additional information is obtained. We find that the previous binary-source interpretations of five events are better interpreted by binary-lens models. These events include OGLE-2006-BLG-238, OGLE-2007-BLG-159, OGLE-2007-BLG-491, OGLE-2008-BLG-143, and OGLE-2008-BLG-210. With additional data covering caustic crossings, we detect finite-source effects for six events including OGLE-2006-BLG-215, OGLE-2006-BLG-238, OGLE-2006-BLG-450, OGLE-2008-BLG-143, OGLE-2008-BLG-210, and OGLE-2008-BLG-513. Among them, we are able to measure the Einstein radii of three events for which multi-band data are available. These events are OGLE-2006-BLG-238, OGLE-2008-BLG-210, and OGLE-2008-BLG-513. For OGLE-2008-BLG-143, we detect higher-order effects induced by the changes of the observer's position caused by the orbital motion of the Earth around the Sun. In addition, we present degenerate solutions resulting from the known close/wide or ecliptic degeneracy. Finally, we note that the masses of the binary companions of the lenses of OGLE-2006-BLG-450 and OGLE-2008-BLG-210 are in the brown-dwarf regime.",

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

author = "J. Jeong and H. Park and C. Han and A. Gould and A. Udalski and Szyma{\'n}ski, {M. K.} and G. Pietrzy{\'n}ski and I. Soszy{\'n}ski and R. Poleski and K. Ulaczyk and {\L}. Wyrzykowski 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 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 Sweatman, {W. L.} and T. Sumi and D. Suzuki and Tristram, {P. J.} and N. Tsurumi and K. Wada and N. Yamai and Yock, {P. C. M.} and A. Yonehara and Albrow, {M. D.} and V. Batista and J.-P. Beaulieu and Caldwell, {J. A. R.} and A. Cassan and A. Cole and C. Coutures and S. Dieters and M. Dominik and {Dominis Prester}, D. and J. Donatowicz and P. Fouqu{\'e} and J. Greenhill and M. Hoffman and M. Huber and J{\o}rgensen, {U. G.} and Kane, {S. R.} and D. Kubas and R. Martin and J.-B. Marquette and J. Menzies and C. Pitrou and K. Pollard and Sahu, {K. C.} and C. Vinter and J. Wambsganss and A. Williams and W. Allen and G. Bolt and J.-Y. Choi and Christie, {G. W.} and DePoy, {D. L.} and J. Drummond and Gaudi, {B. S.} and K.-H. Hwang and Jung, {Y. K.} and C.-U. Lee and F. Mallia and D. Maoz and A. Maury and J. McCormick and Monard, {L. A. G.} and D. Moorhouse and T. Natusch and Ofek, {E. O.} and B.-G. Park and Pogge, {R. W.} and R. Santallo and I.-G. Shin and G. Thornley and Yee, {J. C.} and Bramich, {D. M.} and M. Burgdorf and K. Horne and M. Hundertmark and N. Kains and C. Snodgrass and I. Steele and R. Street and Y. Tsapras",

note = "Work by C.H. was supported by the Creative Research Initiative Program (2009-0081561) of the National Research Foundation of Korea. The OGLE project has received funding from the European Research Council under the European Community's Seventh Framework Programme (FP7/2007-2013) / ERC grant agreement no. 246678 to AU. The MOA project is supported by the grants JSPS18253002 and JSPS20340052. T.S. acknowledges the financial support from the JSPS, JSPS23340044 and JSPS24253004. D.P.B. was supported by grants NASA-NNX12AF54G, JPL-RSA 1453175, and NSF AST-1211875. B.S.G. and A.G. were supported by NSF grant AST 110347. B.S.G., A.G., and R.P.G. were supported by NASA grant NNX12AB99G. ",

year = "2015",

month = may,

day = "1",

doi = "10.1088/0004-637X/804/1/38",

language = "English",

volume = "804",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1",

}

Jeong, J, Park, H, Han, C, Gould, A, Udalski, A, Szymański, MK, Pietrzyński, G, Soszyński, I, Poleski, R, Ulaczyk, K, Wyrzykowski, Ł, Abe, F, Bennett, DP, Bond, IA, Botzler, CS, Freeman, M, Fukui, A, Fukunaga, D, Itow, Y, Koshimoto, N, Masuda, K, Matsubara, Y, Muraki, Y, Namba, S, Ohnishi, K, Rattenbury, NJ, Saito, T, Sullivan, DJ, Sweatman, WL, Sumi, T, Suzuki, D, Tristram, PJ, Tsurumi, N, Wada, K, Yamai, N, Yock, PCM, Yonehara, A, Albrow, MD, Batista, V, Beaulieu, J-P, Caldwell, JAR, Cassan, A, Cole, A, Coutures, C, Dieters, S, Dominik, M, Dominis Prester, D, Donatowicz, J, Fouqué, P, Greenhill, J, Hoffman, M, Huber, M, Jørgensen, UG, Kane, SR, Kubas, D, Martin, R, Marquette, J-B, Menzies, J, Pitrou, C, Pollard, K, Sahu, KC, Vinter, C, Wambsganss, J, Williams, A, Allen, W, Bolt, G, Choi, J-Y, Christie, GW, DePoy, DL, Drummond, J, Gaudi, BS, Hwang, K-H, Jung, YK, Lee, C-U, Mallia, F, Maoz, D, Maury, A, McCormick, J, Monard, LAG, Moorhouse, D, Natusch, T, Ofek, EO, Park, B-G, Pogge, RW, Santallo, R, Shin, I-G, Thornley, G, Yee, JC, Bramich, DM, Burgdorf, M, Horne, K, Hundertmark, M, Kains, N, Snodgrass, C, Steele, I, Street, R & Tsapras, Y 2015, 'Reanalyses of anomalous gravitational microlensing events in the OGLE-III early warning system database with combined data', Astrophysical Journal, vol. 804, no. 1. https://doi.org/10.1088/0004-637X/804/1/38

TY - JOUR

T1 - Reanalyses of anomalous gravitational microlensing events in the OGLE-III early warning system database with combined data

AU - Jeong, J.

AU - Park, H.

AU - Han, C.

AU - Gould, A.

AU - Udalski, A.

AU - Szymański, M. K.

AU - Pietrzyński, G.

AU - Soszyński, I.

AU - Poleski, R.

AU - Ulaczyk, K.

AU - Wyrzykowski, Ł.

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 - 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 - Sweatman, W. L.

AU - Sumi, T.

AU - Suzuki, D.

AU - Tristram, P. J.

AU - Tsurumi, N.

AU - Wada, K.

AU - Yamai, N.

AU - Yock, P. C. M.

AU - Yonehara, A.

AU - Albrow, M. D.

AU - Batista, V.

AU - Beaulieu, J.-P.

AU - Caldwell, J. A. R.

AU - Cassan, A.

AU - Cole, A.

AU - Coutures, C.

AU - Dieters, S.

AU - Dominik, M.

AU - Dominis Prester, D.

AU - Donatowicz, J.

AU - Fouqué, P.

AU - Greenhill, J.

AU - Hoffman, M.

AU - Huber, M.

AU - Jørgensen, U. G.

AU - Kane, S. R.

AU - Kubas, D.

AU - Martin, R.

AU - Marquette, J.-B.

AU - Menzies, J.

AU - Pitrou, C.

AU - Pollard, K.

AU - Sahu, K. C.

AU - Vinter, C.

AU - Wambsganss, J.

AU - Williams, A.

AU - Allen, W.

AU - Bolt, G.

AU - Choi, J.-Y.

AU - Christie, G. W.

AU - DePoy, D. L.

AU - Drummond, J.

AU - Gaudi, B. S.

AU - Hwang, K.-H.

AU - Jung, Y. K.

AU - Lee, C.-U.

AU - Mallia, F.

AU - Maoz, D.

AU - Maury, A.

AU - McCormick, J.

AU - Monard, L. A. G.

AU - Moorhouse, D.

AU - Natusch, T.

AU - Ofek, E. O.

AU - Park, B.-G.

AU - Pogge, R. W.

AU - Santallo, R.

AU - Shin, I.-G.

AU - Thornley, G.

AU - Yee, J. C.

AU - Bramich, D. M.

AU - Burgdorf, M.

AU - Horne, K.

AU - Hundertmark, M.

AU - Kains, N.

AU - Snodgrass, C.

AU - Steele, I.

AU - Street, R.

AU - Tsapras, Y.

N1 - Work by C.H. was supported by the Creative Research Initiative Program (2009-0081561) of the National Research Foundation of Korea. The OGLE project has received funding from the European Research Council under the European Community's Seventh Framework Programme (FP7/2007-2013) / ERC grant agreement no. 246678 to AU. The MOA project is supported by the grants JSPS18253002 and JSPS20340052. T.S. acknowledges the financial support from the JSPS, JSPS23340044 and JSPS24253004. D.P.B. was supported by grants NASA-NNX12AF54G, JPL-RSA 1453175, and NSF AST-1211875. B.S.G. and A.G. were supported by NSF grant AST 110347. B.S.G., A.G., and R.P.G. were supported by NASA grant NNX12AB99G.

PY - 2015/5/1

Y1 - 2015/5/1

N2 - We reanalyze microlensing events in the published list of anomalous events that were observed from the Optical Gravitational Lensing Experiment (OGLE) lensing survey conducted during the 2004–2008 period. In order to check the existence of possible degenerate solutions and extract extra information, we conduct analyses based on combined data from other survey and follow-up observation and consider higher-order effects. Among the analyzed events, we present analyses of eight events for which either new solutions are identified or additional information is obtained. We find that the previous binary-source interpretations of five events are better interpreted by binary-lens models. These events include OGLE-2006-BLG-238, OGLE-2007-BLG-159, OGLE-2007-BLG-491, OGLE-2008-BLG-143, and OGLE-2008-BLG-210. With additional data covering caustic crossings, we detect finite-source effects for six events including OGLE-2006-BLG-215, OGLE-2006-BLG-238, OGLE-2006-BLG-450, OGLE-2008-BLG-143, OGLE-2008-BLG-210, and OGLE-2008-BLG-513. Among them, we are able to measure the Einstein radii of three events for which multi-band data are available. These events are OGLE-2006-BLG-238, OGLE-2008-BLG-210, and OGLE-2008-BLG-513. For OGLE-2008-BLG-143, we detect higher-order effects induced by the changes of the observer's position caused by the orbital motion of the Earth around the Sun. In addition, we present degenerate solutions resulting from the known close/wide or ecliptic degeneracy. Finally, we note that the masses of the binary companions of the lenses of OGLE-2006-BLG-450 and OGLE-2008-BLG-210 are in the brown-dwarf regime.

AB - We reanalyze microlensing events in the published list of anomalous events that were observed from the Optical Gravitational Lensing Experiment (OGLE) lensing survey conducted during the 2004–2008 period. In order to check the existence of possible degenerate solutions and extract extra information, we conduct analyses based on combined data from other survey and follow-up observation and consider higher-order effects. Among the analyzed events, we present analyses of eight events for which either new solutions are identified or additional information is obtained. We find that the previous binary-source interpretations of five events are better interpreted by binary-lens models. These events include OGLE-2006-BLG-238, OGLE-2007-BLG-159, OGLE-2007-BLG-491, OGLE-2008-BLG-143, and OGLE-2008-BLG-210. With additional data covering caustic crossings, we detect finite-source effects for six events including OGLE-2006-BLG-215, OGLE-2006-BLG-238, OGLE-2006-BLG-450, OGLE-2008-BLG-143, OGLE-2008-BLG-210, and OGLE-2008-BLG-513. Among them, we are able to measure the Einstein radii of three events for which multi-band data are available. These events are OGLE-2006-BLG-238, OGLE-2008-BLG-210, and OGLE-2008-BLG-513. For OGLE-2008-BLG-143, we detect higher-order effects induced by the changes of the observer's position caused by the orbital motion of the Earth around the Sun. In addition, we present degenerate solutions resulting from the known close/wide or ecliptic degeneracy. Finally, we note that the masses of the binary companions of the lenses of OGLE-2006-BLG-450 and OGLE-2008-BLG-210 are in the brown-dwarf regime.

KW - Binaries: close

KW - Gravitational lensing: micro

UR - http://adsabs.harvard.edu/abs/2015ApJ...804...38J

U2 - 10.1088/0004-637X/804/1/38

DO - 10.1088/0004-637X/804/1/38

M3 - Article

SN - 0004-637X

VL - 804

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

Reanalyses of anomalous gravitational microlensing events in the OGLE-III early warning system database with combined data

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Astronomy at St Andrews 2015-2018: Astronomy at St Andrews 2015-2018

AGN Echo mapping: AGN Echo Mapping and Mineral Clouds in Alien Atmospheres

Planet population statistics: Planet population statistics from fully-deterministic microlensing campaigns

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Reanalyses of anomalous gravitational microlensing events in the OGLE-III early warning system database with combined data

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Projects

Astronomy at St Andrews 2015-2018: Astronomy at St Andrews 2015-2018

AGN Echo mapping: AGN Echo Mapping and Mineral Clouds in Alien Atmospheres

Planet population statistics: Planet population statistics from fully-deterministic microlensing campaigns

Cite this