OGLE-2017-BLG-1130: The First Binary Gravitational Microlens Detected from Spitzer Only
We analyze the binary gravitational microlensing event OGLE-2017-BLG-1130 (mass ratio q ∼ 0.45), the first published case in which the binary anomaly was detected only by the Spitzer Space Telescope. This event provides strong evidence that some binary signals can be missed by observations from the...
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| Veröffentlicht in: | The Astrophysical journal 2018-06, Vol.860 (1), p.25 |
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| creator | Wang, Tianshu Calchi Novati, S. Udalski, A. Gould, A. Mao, Shude Zang, W. Beichman, C. Bryden, G. Carey, S. Gaudi, B. S. Henderson, C. B. Shvartzvald, Y. Yee, J. C. Mróz, P. Poleski, R. Skowron, J. Szyma ski, M. K. Soszy ski, I. Koz owski, S. Pietrukowicz, P. Ulaczyk, K. Pawlak, M. Albrow, M. D. Chung, S.-J. Han, C. Hwang, K.-H. Jung, Y. K. Ryu, Y.-H. Shin, I.-G. Zhu, W. Cha, S.-M. Kim, D.-J. Kim, H.-W. Kim, S.-L. Lee, C.-U. Lee, D.-J. Lee, Y. Park, B.-G. Pogge, R. W. |
| description | We analyze the binary gravitational microlensing event OGLE-2017-BLG-1130 (mass ratio q ∼ 0.45), the first published case in which the binary anomaly was detected only by the Spitzer Space Telescope. This event provides strong evidence that some binary signals can be missed by observations from the ground alone but detected by Spitzer. We therefore invert the normal procedure, first finding the lens parameters by fitting the space-based data and then measuring the microlensing parallax using ground-based observations. We also show that the normal four-fold space-based degeneracy in the single-lens case can become a weak eight-fold degeneracy in binary-lens events. Although this degeneracy is resolved in event OGLE-2017-BLG-1130, it might persist in other events. |
| doi_str_mv | 10.3847/1538-4357/aabcd2 |
| format | Article |
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S. ; Henderson, C. B. ; Shvartzvald, Y. ; Yee, J. C. ; Mróz, P. ; Poleski, R. ; Skowron, J. ; Szyma ski, M. K. ; Soszy ski, I. ; Koz owski, S. ; Pietrukowicz, P. ; Ulaczyk, K. ; Pawlak, M. ; Albrow, M. D. ; Chung, S.-J. ; Han, C. ; Hwang, K.-H. ; Jung, Y. K. ; Ryu, Y.-H. ; Shin, I.-G. ; Zhu, W. ; Cha, S.-M. ; Kim, D.-J. ; Kim, H.-W. ; Kim, S.-L. ; Lee, C.-U. ; Lee, D.-J. ; Lee, Y. ; Park, B.-G. ; Pogge, R. W.</creator><creatorcontrib>Wang, Tianshu ; Calchi Novati, S. ; Udalski, A. ; Gould, A. ; Mao, Shude ; Zang, W. ; Beichman, C. ; Bryden, G. ; Carey, S. ; Gaudi, B. S. ; Henderson, C. B. ; Shvartzvald, Y. ; Yee, J. C. ; Mróz, P. ; Poleski, R. ; Skowron, J. ; Szyma ski, M. K. ; Soszy ski, I. ; Koz owski, S. ; Pietrukowicz, P. ; Ulaczyk, K. ; Pawlak, M. ; Albrow, M. D. ; Chung, S.-J. ; Han, C. ; Hwang, K.-H. ; Jung, Y. K. ; Ryu, Y.-H. ; Shin, I.-G. ; Zhu, W. ; Cha, S.-M. ; Kim, D.-J. ; Kim, H.-W. ; Kim, S.-L. ; Lee, C.-U. ; Lee, D.-J. ; Lee, Y. ; Park, B.-G. ; Pogge, R. W. ; OGLE Collaboration ; KMTNet Collaboration ; Spitzer Team</creatorcontrib><description>We analyze the binary gravitational microlensing event OGLE-2017-BLG-1130 (mass ratio q ∼ 0.45), the first published case in which the binary anomaly was detected only by the Spitzer Space Telescope. This event provides strong evidence that some binary signals can be missed by observations from the ground alone but detected by Spitzer. We therefore invert the normal procedure, first finding the lens parameters by fitting the space-based data and then measuring the microlensing parallax using ground-based observations. We also show that the normal four-fold space-based degeneracy in the single-lens case can become a weak eight-fold degeneracy in binary-lens events. Although this degeneracy is resolved in event OGLE-2017-BLG-1130, it might persist in other events.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/aabcd2</identifier><language>eng</language><publisher>Philadelphia: The American Astronomical Society</publisher><subject>Astrophysics ; binaries: general ; Gravitation ; gravitational lensing: micro ; Ground-based observation ; Lenses ; Microlenses ; Parallax ; Space telescopes</subject><ispartof>The Astrophysical journal, 2018-06, Vol.860 (1), p.25</ispartof><rights>2018. The American Astronomical Society. All rights reserved.</rights><rights>Copyright IOP Publishing Jun 10, 2018</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c445t-8f318813c3d4f5b91a5aed6a6383b04eee8bec8e37b4b03b7a72fe1b8b2d2d573</citedby><cites>FETCH-LOGICAL-c445t-8f318813c3d4f5b91a5aed6a6383b04eee8bec8e37b4b03b7a72fe1b8b2d2d573</cites><orcidid>0000-0002-4355-9838 ; 0000-0001-6285-4528 ; 0000-0003-1525-5041 ; 0000-0002-2335-1730 ; 0000-0002-2641-9964 ; 0000-0002-7669-1069 ; 0000-0002-9241-4117 ; 0000-0003-0395-9869 ; 0000-0002-0314-6000 ; 0000-0001-8877-9060 ; 0000-0001-9823-2907 ; 0000-0003-4084-880X ; 0000-0002-2339-5899</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.3847/1538-4357/aabcd2/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>314,776,780,27901,27902,38867,53842</link.rule.ids><linktorsrc>$$Uhttps://iopscience.iop.org/article/10.3847/1538-4357/aabcd2$$EView_record_in_IOP_Publishing$$FView_record_in_$$GIOP_Publishing</linktorsrc></links><search><creatorcontrib>Wang, Tianshu</creatorcontrib><creatorcontrib>Calchi Novati, S.</creatorcontrib><creatorcontrib>Udalski, A.</creatorcontrib><creatorcontrib>Gould, A.</creatorcontrib><creatorcontrib>Mao, Shude</creatorcontrib><creatorcontrib>Zang, W.</creatorcontrib><creatorcontrib>Beichman, C.</creatorcontrib><creatorcontrib>Bryden, G.</creatorcontrib><creatorcontrib>Carey, S.</creatorcontrib><creatorcontrib>Gaudi, B. S.</creatorcontrib><creatorcontrib>Henderson, C. B.</creatorcontrib><creatorcontrib>Shvartzvald, Y.</creatorcontrib><creatorcontrib>Yee, J. C.</creatorcontrib><creatorcontrib>Mróz, P.</creatorcontrib><creatorcontrib>Poleski, R.</creatorcontrib><creatorcontrib>Skowron, J.</creatorcontrib><creatorcontrib>Szyma ski, M. K.</creatorcontrib><creatorcontrib>Soszy ski, I.</creatorcontrib><creatorcontrib>Koz owski, S.</creatorcontrib><creatorcontrib>Pietrukowicz, P.</creatorcontrib><creatorcontrib>Ulaczyk, K.</creatorcontrib><creatorcontrib>Pawlak, M.</creatorcontrib><creatorcontrib>Albrow, M. D.</creatorcontrib><creatorcontrib>Chung, S.-J.</creatorcontrib><creatorcontrib>Han, C.</creatorcontrib><creatorcontrib>Hwang, K.-H.</creatorcontrib><creatorcontrib>Jung, Y. K.</creatorcontrib><creatorcontrib>Ryu, Y.-H.</creatorcontrib><creatorcontrib>Shin, I.-G.</creatorcontrib><creatorcontrib>Zhu, W.</creatorcontrib><creatorcontrib>Cha, S.-M.</creatorcontrib><creatorcontrib>Kim, D.-J.</creatorcontrib><creatorcontrib>Kim, H.-W.</creatorcontrib><creatorcontrib>Kim, S.-L.</creatorcontrib><creatorcontrib>Lee, C.-U.</creatorcontrib><creatorcontrib>Lee, D.-J.</creatorcontrib><creatorcontrib>Lee, Y.</creatorcontrib><creatorcontrib>Park, B.-G.</creatorcontrib><creatorcontrib>Pogge, R. W.</creatorcontrib><creatorcontrib>OGLE Collaboration</creatorcontrib><creatorcontrib>KMTNet Collaboration</creatorcontrib><creatorcontrib>Spitzer Team</creatorcontrib><title>OGLE-2017-BLG-1130: The First Binary Gravitational Microlens Detected from Spitzer Only</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. J</addtitle><description>We analyze the binary gravitational microlensing event OGLE-2017-BLG-1130 (mass ratio q ∼ 0.45), the first published case in which the binary anomaly was detected only by the Spitzer Space Telescope. This event provides strong evidence that some binary signals can be missed by observations from the ground alone but detected by Spitzer. We therefore invert the normal procedure, first finding the lens parameters by fitting the space-based data and then measuring the microlensing parallax using ground-based observations. We also show that the normal four-fold space-based degeneracy in the single-lens case can become a weak eight-fold degeneracy in binary-lens events. Although this degeneracy is resolved in event OGLE-2017-BLG-1130, it might persist in other events.</description><subject>Astrophysics</subject><subject>binaries: general</subject><subject>Gravitation</subject><subject>gravitational lensing: micro</subject><subject>Ground-based observation</subject><subject>Lenses</subject><subject>Microlenses</subject><subject>Parallax</subject><subject>Space telescopes</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp9kM9LwzAUx4MoOKd3jwE9GpdfbVJvOrcqTHZworeQtCl2dG1NMmH-9bZW9CKeHu_x-X75vi8ApwRfMsnFhERMIs4iMdHaZDndA6Of0z4YYYw5ipl4OQRH3q_7lSbJCDwv08UMUUwEulmkiBCGr-Dq1cJ56XyAN2Wt3Q6mTr-XQYeyqXUFH8rMNZWtPby1wWbB5rBwzQY-tmX4sA4u62p3DA4KXXl78j3H4Gk-W03v0GKZ3k-vFyjjPApIFoxISVjGcl5EJiE60jaPdcwkM5hba6WxmbRMGG4wM0ILWlhipKE5zSPBxuBs8G1d87a1Pqh1s3VdSq8oiyORMPFF4YHqgnvvbKFaV266zxTBqq9P9V2pvis11NdJLgZJ2bS_nv_g53_gul0rGWNFFI1UmxfsExCJfHQ</recordid><startdate>20180610</startdate><enddate>20180610</enddate><creator>Wang, Tianshu</creator><creator>Calchi Novati, S.</creator><creator>Udalski, A.</creator><creator>Gould, A.</creator><creator>Mao, Shude</creator><creator>Zang, W.</creator><creator>Beichman, C.</creator><creator>Bryden, G.</creator><creator>Carey, S.</creator><creator>Gaudi, B. S.</creator><creator>Henderson, C. B.</creator><creator>Shvartzvald, Y.</creator><creator>Yee, J. C.</creator><creator>Mróz, P.</creator><creator>Poleski, R.</creator><creator>Skowron, J.</creator><creator>Szyma ski, M. K.</creator><creator>Soszy ski, I.</creator><creator>Koz owski, S.</creator><creator>Pietrukowicz, P.</creator><creator>Ulaczyk, K.</creator><creator>Pawlak, M.</creator><creator>Albrow, M. D.</creator><creator>Chung, S.-J.</creator><creator>Han, C.</creator><creator>Hwang, K.-H.</creator><creator>Jung, Y. K.</creator><creator>Ryu, Y.-H.</creator><creator>Shin, I.-G.</creator><creator>Zhu, W.</creator><creator>Cha, S.-M.</creator><creator>Kim, D.-J.</creator><creator>Kim, H.-W.</creator><creator>Kim, S.-L.</creator><creator>Lee, C.-U.</creator><creator>Lee, D.-J.</creator><creator>Lee, Y.</creator><creator>Park, B.-G.</creator><creator>Pogge, R. 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S. ; Henderson, C. B. ; Shvartzvald, Y. ; Yee, J. C. ; Mróz, P. ; Poleski, R. ; Skowron, J. ; Szyma ski, M. K. ; Soszy ski, I. ; Koz owski, S. ; Pietrukowicz, P. ; Ulaczyk, K. ; Pawlak, M. ; Albrow, M. D. ; Chung, S.-J. ; Han, C. ; Hwang, K.-H. ; Jung, Y. K. ; Ryu, Y.-H. ; Shin, I.-G. ; Zhu, W. ; Cha, S.-M. ; Kim, D.-J. ; Kim, H.-W. ; Kim, S.-L. ; Lee, C.-U. ; Lee, D.-J. ; Lee, Y. ; Park, B.-G. ; Pogge, R. 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C.</au><au>Mróz, P.</au><au>Poleski, R.</au><au>Skowron, J.</au><au>Szyma ski, M. K.</au><au>Soszy ski, I.</au><au>Koz owski, S.</au><au>Pietrukowicz, P.</au><au>Ulaczyk, K.</au><au>Pawlak, M.</au><au>Albrow, M. D.</au><au>Chung, S.-J.</au><au>Han, C.</au><au>Hwang, K.-H.</au><au>Jung, Y. K.</au><au>Ryu, Y.-H.</au><au>Shin, I.-G.</au><au>Zhu, W.</au><au>Cha, S.-M.</au><au>Kim, D.-J.</au><au>Kim, H.-W.</au><au>Kim, S.-L.</au><au>Lee, C.-U.</au><au>Lee, D.-J.</au><au>Lee, Y.</au><au>Park, B.-G.</au><au>Pogge, R. W.</au><aucorp>OGLE Collaboration</aucorp><aucorp>KMTNet Collaboration</aucorp><aucorp>Spitzer Team</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>OGLE-2017-BLG-1130: The First Binary Gravitational Microlens Detected from Spitzer Only</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. 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| source | IOP Publishing Free Content |
| subjects | Astrophysics binaries: general Gravitation gravitational lensing: micro Ground-based observation Lenses Microlenses Parallax Space telescopes |
| title | OGLE-2017-BLG-1130: The First Binary Gravitational Microlens Detected from Spitzer Only |
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