Results 71 to 80 of about 11,007 (146)

Lens Masses and Distances from Microlens Parallax and Flux

, 2015
I present a novel method for measuring lens masses for microlensing events. By combining a measured lens flux with the microlens parallax vector pi_E, it is possible to derive the mass of the lens system without knowing the angular size of the Einstein ...
Yee, Jennifer C.
core   +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

Optical Gravitational Lensing Experiment. OGLE-1999-BUL-19: The First Multi-Peak Parallax Event [PDF]

, 2002
We describe a highly unusual microlensing event, OGLE-1999-BUL-19, which exhibits multiple peaks in its light curve. The Einstein radius crossing time for this event is approximately one year, which is unusually long. We show that the motion of the Earth
A. Udalski, Agol, Alard, Albrow, Alcock, Alcock, Alcock, Alcock, An, Becker, Bennett, Bessell, Bond, Cox, Delplancke, Derue, Dominik, Dominik, Dominik, Duquennoy, G. Pietrzyński, Girardi, Gould, Gould, Gould, Gould, Gould, Gould, Griest, Han, Han, Han, Han, Han, Hosokawa, Høg, I. Soszyński, K. Żebruń, Landau, M. Kubiak, M. Szymański, Mao, Mao, Mao, Mao, Mao, Mao, Martin C. Smith, Miyamoto, Nemiroff, P. Woźniak, Paczyński, Paczyński, Paczyński, Paczyński, Schechter, Shude Mao, Smith, Soszyński, Stanek, Udalski, Udalski, Walker, Witt, Woźniak, Woźniak   +65 more
core   +2 more sources

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

Optimal Survey Strategies and Predicted Planet Yields for the Korean Microlensing Telescope Network [PDF]

, 2014
The Korean Microlensing Telescope Network (KMTNet) will consist of three 1.6m telescopes each with a 4 deg^{2} field of view (FoV) and will be dedicated to monitoring the Galactic Bulge to detect exoplanets via gravitational microlensing.
Gaudi, B. Scott, Gould, Andrew P., Han, Cheongho, Henderson, Calen B., Nataf, David, Penny, Matthew T., Skowron, Jan   +6 more
core   +3 more sources

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

Observations of the Binary Microlens Event MACHO-98-SMC-1 by the Microlensing Planet Search Collaboration

, 1998
We present the observations of the binary lensing event MACHO-98-SMC-1 conducted at the Mt.~Stromlo 74" telescope by the Microlensing Planet Search (MPS) collaboration.
A. C. Becker, Afonso C., B. A. Peterson, B. R. Johnson, Becker A. C., Bennett D., Bennett D., Bertelli G., Binney J., D. P. Bennett, Diaz-Cordoves J., Diaz-Cordoves J., Honma M., J. Quinn, L. J. King, P. C. Fragile, Palanque-Delabrouille N., S. H. Rhie, Sahu K. C., Udalski A., Udalski A.   +20 more
core   +2 more sources

OGLE-2005-BLG-153: Microlensing Discovery and Characterization of A Very Low Mass Binary [PDF]

, 2010
The mass function and statistics of binaries provide important diagnostics of the star formation process. Despite this importance, the mass function at low masses remains poorly known due to observational difficulties caused by the faintness of the ...
Abe, F., Albrow, M., Beaulieu, J.-P., Bennett, D. P., Bode, M., Bond, I. A., Botzler, C. S., Bramich, D. M., Brillant, S., Burgdorf, M., Caldwell, J. A. R., Calitz, J. J., Cassan, A., Cook, K. H., Corrales, E., Coutures, C., Depoy, D. L., Desort, M., Dieters, S., Dominik, M., Dominis, D., Donatowicz, J., Fouque, P., Gaudi, B. S., Gould, A., Greenhill, J., Han, C., Harpsoe, K., Hearnshaw, J. B., Hill, K., Hoffman, M., Horne, K., Hwang, K.-H., Itow, Y., Jorgensen, U. G., Kamiya, K., Kane, S., Kilmartin, P. M., Kubas, D., Kubiak, M., Lee, C.-U., Marquette, J.-B., Martin, R., Masuda, K., Matsubara, Y., Meintjes, P., Menzies, J., Motomura, M., Muraki, Y., Nakamura, S., Ohnishi, K., Okada, C., Park, B.-G., Pietrzynski, G., Pogge, R. W., Pollard, K., Rattenbury, N., Ryu, Y.-H., Sahu, K., Saito, To, Sako, T., Sasaki, M., Snodgrass, C., Soszynski, I., Steele, I., Sullivan, D. J., Sumi, T., Szewczyk, O., Szymanski, M. K., The MOA Collaboration, The OGLE Collaboration, The Planet/RoboNet Collaboration, The μFUN Collaboration, Tristram, P. J., Udalski, A., Ulaczyk, K., Vinter, C., Wambsganss, J., Williams, A., Woller, K., Wood, J. N., Wyrzykowski, L., Yock, P. C. M., Yoshioka, T.   +83 more
core   +3 more sources

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