Results 41 to 50 of about 7,742 (115)

An analysis of binary microlensing event OGLE-2015-BLG-0060 [PDF]

Monthly notices of the Royal Astronomical Society, 2019
We present the analysis of stellar binary microlensing event OGLE-2015-BLG-0060 based on observations obtained from 13 different telescopes. Intensive coverage of the anomalous parts of the light curve was achieved by automated follow-up observations ...
Y. Tsapras, A. Cassan, C. Ranc, É. Bachelet, R. Street, A. Udalski, M. Hundertmark, V. Bozza, J. Beaulieu, J. Marquette, E. Euteneuer, D. Bramich, M. Dominik, R. Jaimes, K. Horne, S. Mao, J. Menzies, R. Schmidt, C. Snodgrass, I. Steele, J. Wambsganss, P. Mróz, M. Szymański, I. Soszyński, J. Skowron, P. Pietrukowicz, S. Kozłowski, R. Poleski, K. Ulaczyk, M. Pawlak, U. Jørgensen, J. Skottfelt, A. Popovas, S. Ciceri, H. Korhonen, M. Kuffmeier, D. Evans, N. Peixinho, T. Hinse, M. Burgdorf, J. Southworth, R. Tronsgaard, E. Kerins, M. Andersen, S. Rahvar, Y. Wang, O. Wertz, M. Rabus, S. Novati, G. D’Ago, G. Scarpetta, L. Mancini, F. Abe, Y. Asakura, D. P. Bennett, A. Bhattacharya, M. Donachie, P. Evans, A. Fukui, Y. Hirao, Y. Itow, K. Kawasaki, N. Koshimoto, M. Li, C. Ling, K. Masuda, Y. Matsubara, Yasushi Muraki, S. Miyazaki, M. Nagakane, K. Ohnishi, N. Rattenbury, T. Saito, A. Sharan, H. Shibai, D. Sullivan, T. Sumi, D. Suzuki, P. Tristram, T. Yamada, A. Yonehara, Robonet Team, T. Saito   +82 more
semanticscholar   +1 more source

microJAX: A Differentiable Framework for Microlensing Modeling with GPU-accelerated Image-centered Ray Shooting

The Astrophysical Journal
We introduce microJAX , the first fully differentiable implementation of the image-centered ray shooting algorithm for gravitational microlensing. Built on JAX and its XLA just-in-time compiler, microJAX exploits GPU parallelism while providing exact ...
Shota Miyazaki, Hajime Kawahara
doaj   +1 more source

Spitzer Microlensing of MOA-2016-BLG-231L: A Counter-rotating Brown Dwarf Binary in the Galactic Disk [PDF]

Astrophysical Journal, 2019
We analyze the binary microlensing event MOA-2016-BLG-231, which was observed from the ground and from Spitzer. The lens is composed of very-low-mass brown dwarfs (BDs) with and , and it is located in the Galactic disk .
S. Chung, S. Chung, A. Gould, J. Skowron, I. Bond, Wei Zhu, M. Albrow, Y. Jung, C. Han, K. Hwang, Y. Ryu, I. Shin, Y. Shvartzvald, J. Yee, W. Zang, S. Cha, S. Cha, Dong-Jin Kim, Hyoun-Woo Kim, Seung-Lee Kim, Seung-Lee Kim, Y. H. Kim, Y. H. Kim, Chung-Uk Lee, Chung-Uk Lee, Dong-Joo Lee, Yongseok Lee, Yongseok Lee, B.-G. Park, B.-G. Park, R. Pogge, A. Udalski, R. Poleski, R. Poleski, P. Mr'oz, P. Pietrukowicz, M. Szyma'nski, I. Soszy'nski, S. Kozłowski, K. Ulaczyk, K. Ulaczyk, M. Pawlak, C. Beichman, G. Bryden, S. Novati, S. Carey, B. Gaudi, C. Henderson, F. Abe, R. Barry, D. P. Bennett, D. P. Bennett, A. Bhattacharya, A. Bhattacharya, M. Donachie, A. Fukui, A. Fukui, Y. Hirao, Y. Itow, K. Kawasaki, I. Kondo, N. Koshimoto, M. Li, Y. Matsubara, Y. Muraki, S. Miyazaki, M. Nagakane, C. Ranc, N. Rattenbury, H. Suematsu, D. Sullivan, T. Sumi, D. Suzuki, P. Tristram, A. Yonehara   +74 more
semanticscholar   +1 more source

Confirmation of the Stellar Binary Microlensing Event, Macho 97-BLG-28 [PDF]

Astrophysical Journal, 2019
The high-magnification microlensing event MACHO-97-BLG-28 was previously determined to be a binary system composed of either two M dwarfs or an M dwarf and a brown dwarf. We present a revised light-curve model using additional data from the Mt.
J. Blackman, J. Beaulieu, A. Cole, A. Vandorou, N. Koshimoto, É. Bachelet, V. Batista, A. Bhattacharya, D. Bennett   +8 more
semanticscholar   +1 more source

Polarization in caustic-crossing binary microlensing events [PDF]

Monthly notices of the Royal Astronomical Society, 2019
Here, we revisit the polarization signal in caustic-crossing binary microlensing and introduce the maps of the polarization signals of the source star as a function of its position projected on the lens plane.
S. Sajadian
semanticscholar   +1 more source

MOA-2010-BLG-328: Keck and HST Expose the Limits of Occams Razor in Microlensing

The Astronomical Journal
We present high-resolution follow-up data of the microlensing event MOA-2010-BLG-328, using Keck and the Hubble Space Telescope. Keck data, taken 8 yr after the event, reveal a strong lens detection enabling measurement of lens flux and source-lens ...
Aikaterini Vandorou, David P. Bennett, Jean-Philippe Beaulieu, Aparna Bhattacharya, Joshua W. Blackman, Ian A. Bond, Andrew A. Cole, Naoki Koshimoto, Clément Ranc, Natalia E. Rektsini, Sean K. Terry   +10 more
doaj   +1 more source

OGLE-2014-BLG-1186: gravitational microlensing providing evidence for a planet orbiting the foreground star or for a close binary source? [PDF]

Monthly notices of the Royal Astronomical Society, 2018
Discussing the particularly long gravitational microlensing event OGLE-2014-BLG-1186 with a time-scale t_E ∼ 300 d, we present a methodology for identifying the nature of localised deviations from single-lens point-source light curves, which ensures that
Martin Dominik, É. Bachelet, É. Bachelet, V. Bozza, V. Bozza, R. Street, C. Han, M. Hundertmark, M. Hundertmark, M. Hundertmark, A. Udalski, D. Bramich, Khalid Al-Subai, S. Novati, S. Ciceri, G. D’ago, R. Jaimes, T. Haugbølle, T. Hinse, T. Hinse, K. Horne, U. Jørgensen, D. Juncher, N. Kains, H. Korhonen, L. Mancini, L. Mancini, L. Mancini, J. Menzies, A. Popovas, M. Rabus, S. Rahvar, G. Scarpetta, G. Scarpetta, R. Schmidt, J. Skottfelt, J. Skottfelt, C. Snodgrass, J. Southworth, D. Starkey, I. A. Steele, J. Surdej, Y. Tsapras, Y. Tsapras, Y. Tsapras, J. Wambsganss, J. Wambsganss, O. Wertz, P. Pietrukowicz, M. Szymański, P. Mróz, J. Skowron, I. Soszyński, K. Ulaczyk, K. Ulaczyk, R. Poleski, R. Poleski, Ł. Wyrzykowski, S. Kozłowski   +58 more
semanticscholar   +1 more source

KMT-2016-BLG-2052L: Microlensing Binary Composed of M Dwarfs Revealed from a Very Long Timescale Event [PDF]

Astrophysical Journal, 2018
We present the analysis of a binary microlensing event, KMT-2016-BLG-2052, for which the lensing-induced brightening of the source star lasted for two seasons.
C. Han, Y. Jung, Y. Shvartzvald, M. Albrow, S. Chung, A. Gould, K. Hwang, Doeon Kim, Chung-Uk Lee, Woong-Tae Kim, Hyoun-Woo Kim, Y. Ryu, I. Shin, J. Yee, Chun-Hwey Kim, S. Cha, Seung-Lee Kim, Dong-Jin Kim, Dong-Joo Lee, Yongseok Lee, B.-G. Park, R. Pogge, C. Beichman, G. Bryden, S. Novati, B. Gaudi, C. Henderson, T. P. Matthew, S. Jacklin   +28 more
semanticscholar   +1 more source

OGLE-2017-BLG-0448Lb: A Low Mass–Ratio Wide-orbit Microlensing Planet?

The Astronomical Journal
The gravitational microlensing technique is most sensitive to planets in a Jupiter-like orbit and has detected more than 200 planets. However, only a few wide-orbit ( s > 2) microlensing planets have been discovered, where s is the planet-to-host ...
Ruocheng Zhai, Radosław Poleski, Weicheng Zang, Youn Kil Jung, Andrzej Udalski, Renkun Kuang, Leading Authors, Michael D. Albrow, Sun-Ju Chung, Andrew Gould, Cheongho Han, Kyu-Ha Hwang, Yoon-Hyun Ryu, In-Gu Shin, Yossi Shvartzvald, Hongjing Yang, Jennifer C. Yee, Sang-Mok Cha, Dong-Jin Kim, Hyoun-Woo Kim, Seung-Lee Kim, Chung-Uk Lee, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, The KMTNet Collaboration, Jan Skowron, Michał K. Szymański, Igor Soszyński, Krzysztof Ulaczyk, Paweł Pietrukowicz, Szymon Kozłowski, Przemek Mróz, Krzysztof A. Rybicki, Patryk Iwanek, Marcin Wrona, Mariusz Gromadzki, The OGLE Collaboration, Hanyue Wang, Shude Mao, Jiyuan Zhang, Qiyue Qian, Wei Zhu, The MAP Collaboration   +44 more
doaj   +1 more source

OGLE-2017-BLG-0329L: A Microlensing Binary Characterized with Dramatically Enhanced Precision Using Data from Space-based Observations [PDF]

, 2018
Mass measurements of gravitational microlenses require one to determine the microlens parallax πE, but precise πE measurement, in many cases, is hampered due to the subtlety of the microlens-parallax signal combined with the difficulty of distinguishing ...
C. Han, S. Novati, A. Udalski, C.‐U. Lee, A. Gould, V. Bozza, P. Mr'oz, P. Pietrukowicz, J. Skowron, M. Szyma'nski, R. Poleski, I. Soszy'nski, S. Kozłowski, K. Ulaczyk, M. Pawlak, K. Rybicki, P. Iwanek, M. Albrow, S. Chung, K. Hwang, Y. Jung, Y. Ryu, I. Shin, Y. Shvartzvald, J. Yee, W. Zang, W. Zhu, S. Cha, D.-J. Kim, H.-W. Kim, S.-L. Kim, D.-J. Lee, Y. Lee, B.-G. Park, R. Pogge, W. Kim, C. Beichman, G. Bryden, S. Carey, B. Gaudi, C. Henderson, M. Dominik, C. Helling, M. Hundertmark, U. Jørgensen, P. Longa-Peña, S. Lowry, S. Sajadian, M. Burgdorf, J. Campbell-White, S. Ciceri, D. Evans, L. Haikala, T. Hinse, S. Rahvar, M. Rabus, C. Snodgrass   +56 more
semanticscholar   +1 more source