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, Wyrzykowski, F. Abe, D. P. Bennett, I. A. Bond, C. S. Botzler, M. Freeman, A. Fukui, D. Fukunaga, Y. Itow, N. Koshimoto & 77 others 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. Jorgensen, 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

Research output: Contribution to journalArticle

3 Citations (Scopus)

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 languageEnglish
Article number38
JournalAstrophysical Journal
Volume804
Issue number1
DOIs
Publication statusPublished - 1 May 2015
Externally publishedYes

Fingerprint

early warning systems
early warning system
experiment
lenses
ecliptic
lists
alkalies
coverings
orbits

Keywords

  • binaries: close
  • gravitational lensing: micro

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

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

In: Astrophysical Journal, Vol. 804, No. 1, 38, 01.05.2015.

Research output: Contribution to journalArticle

Jeong, J, Park, H, Han, C, Gould, A, Udalski, A, Szymański, MK, Pietrzyński, G, Soszyński, I, Poleski, R, Ulaczyk, K, Wyrzykowski, 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, JP, Caldwell, JAR, Cassan, A, Cole, A, Coutures, C, Dieters, S, Dominik, M, Prester, DD, Donatowicz, J, Fouqué, P, Greenhill, J, Hoffman, M, Huber, M, Jorgensen, UG, Kane, SR, Kubas, D, Martin, R, Marquette, JB, Menzies, J, Pitrou, C, Pollard, K, Sahu, KC, Vinter, C, Wambsganss, J, Williams, A, Allen, W, Bolt, G, Choi, JY, Christie, GW, Depoy, DL, Drummond, J, Gaudi, BS, Hwang, KH, Jung, YK, Lee, CU, Mallia, F, Maoz, D, Maury, A, McCormick, J, Monard, LAG, Moorhouse, D, Natusch, T, Ofek, EO, Park, BG, Pogge, RW, Santallo, R, Shin, IG, 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, 38. https://doi.org/10.1088/0004-637X/804/1/38
Jeong, J. ; Park, H. ; Han, C. ; Gould, A. ; Udalski, A. ; Szymański, M. K. ; Pietrzyński, G. ; Soszyński, I. ; Poleski, R. ; Ulaczyk, K. ; Wyrzykowski ; Abe, F. ; Bennett, D. P. ; Bond, I. A. ; Botzler, C. S. ; Freeman, M. ; Fukui, A. ; Fukunaga, D. ; Itow, Y. ; Koshimoto, N. ; Masuda, K. ; Matsubara, Y. ; Muraki, Y. ; Namba, S. ; Ohnishi, K. ; Rattenbury, N. J. ; Saito, To ; Sullivan, D. J. ; Sweatman, W. L. ; Sumi, T. ; Suzuki, D. ; Tristram, P. J. ; Tsurumi, N. ; Wada, K. ; Yamai, N. ; Yock, P. C M ; Yonehara, A. ; Albrow, M. D. ; Batista, V. ; Beaulieu, J. P. ; Caldwell, J. A R ; Cassan, A. ; Cole, A. ; Coutures, C. ; Dieters, S. ; Dominik, M. ; Prester, D. Dominis ; Donatowicz, J. ; Fouqué, P. ; Greenhill, J. ; Hoffman, M. ; Huber, M. ; Jorgensen, U. G. ; Kane, S. R. ; Kubas, D. ; Martin, R. ; Marquette, J. B. ; Menzies, J. ; Pitrou, C. ; Pollard, K. ; Sahu, K. C. ; Vinter, C. ; Wambsganss, J. ; Williams, A. ; Allen, W. ; Bolt, G. ; Choi, J. Y. ; Christie, G. W. ; Depoy, D. L. ; Drummond, J. ; Gaudi, B. S. ; Hwang, K. H. ; Jung, Y. K. ; Lee, C. U. ; Mallia, F. ; Maoz, D. ; Maury, A. ; McCormick, J. ; Monard, L. A G ; Moorhouse, D. ; Natusch, T. ; Ofek, E. O. ; Park, B. G. ; Pogge, R. W. ; Santallo, R. ; Shin, I. G. ; Thornley, G. ; Yee, J. C. ; Bramich, D. M. ; Burgdorf, M. ; Horne, K. ; Hundertmark, M. ; Kains, N. ; Snodgrass, C. ; Steele, I. ; Street, R. ; Tsapras, Y. / Reanalyses of anomalous gravitational microlensing events in the ogle-iii early warning system database with combined data. In: Astrophysical Journal. 2015 ; Vol. 804, No. 1.
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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.",
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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,

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 - Prester, D. Dominis

AU - Donatowicz, J.

AU - Fouqué, P.

AU - Greenhill, J.

AU - Hoffman, M.

AU - Huber, M.

AU - Jorgensen, 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.

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://www.scopus.com/inward/record.url?scp=84946164905&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84946164905&partnerID=8YFLogxK

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

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

M3 - Article

VL - 804

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 38

ER -