Results 11 to 20 of about 3,374 (103)

First Resolution of Microlensed Images of a Binary-lens Event [PDF]

The Astrophysical Journal
We resolve the multiple images of the binary-lens microlensing event ASASSN-22av using the GRAVITY instrument of the Very Large Telescope Interferometer (VLTI).
Zexuan Wu, Subo Dong, A. Mérand, Christopher S. Kochanek, Przemek Mróz, Jinyi Shangguan, Grant Christie, Thiam-Guan Tan, Thomas Bensby, Joss Bland-Hawthorn, Sven Buder, Frank Eisenhauer, Andrew P. Gould, Janez Kos, Tim Natusch, Sanjib Sharma, Andrzej Udalski, J. Woillez, David A. H. Buckley, I. B. Thompson, Karim Abd El Dayem, Anthony Berdeu, Jean-Philippe Berger, Guillaume Bourdarot, Wolfgang Brandner, Richard I. Davies, Denis Defrère, Catherine Dougados, Antonia Drescher, Andreas Eckart, Maximilian Fabricius, Helmut Feuchtgruber, Natascha M. Förster Schreiber, Paulo Garcia, Reinhard Genzel, Stefan Gillessen, Gernot Heißel, Sebastian Hönig, Mathis Houlle, Pierre Kervella, Laura Kreidberg, Sylvestre Lacour, Olivier Lai, Romain Laugier, Jean-Baptiste Le Bouquin, James Leftley, Bruno Lopez, Dieter Lutz, Felix Mang, Florentin Millour, Miguel Montargès, Hugo Nowacki, Mathias Nowak, Thomas Ott, Thibaut Paumard, Karine Perraut, Guy Perrin, Romain Petrov, Pierre-Olivier Petrucci, Nicolas Pourre, Sebastian Rabien, Diogo C. Ribeiro, Sylvie Robbe-Dubois, Matteo Sadun Bordoni, Daryl Santos, Jonas Sauter, Jules Scigliuto, Taro T. Shimizu, Christian Straubmeier, Eckhard Sturm, Matthias Subroweit, Calvin Sykes, Linda Tacconi, Frédéric Vincent, Felix Widmann, the GRAVITY+ collaboration   +75 more
doaj   +8 more sources

KMT-2022-BLG-0086: Another Binary-lens Binary-source Microlensing Event

The Astronomical Journal
We present the analysis of a microlensing event KMT-2022-BLG-0086 of which the overall light curve is not described by a binary-lens single-source (2L1S) model, which suggests the existence of an extra lens or an extra source.
Sun-Ju Chung, Kyu-Ha Hwang, Jennifer C. Yee, Andrew Gould, Ian A. Bond, Hongjing Yang, (Leading Authors), Michael D. Albrow, Youn Kil Jung, Cheongho Han, Yoon-Hyun Ryu, In-Gu Shin, Yossi Shvartzvald, Weicheng Zang, Sang-Mok Cha, Dong-Jin Kim, Seung-Lee Kim, Chung-Uk Lee, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, (The KMTNet Collaboration), Fumio Abe, David P. Bennett, Aparna Bhattacharya, Akihiko Fukui, Ryusei Hamada, Yuki Hirao, Stela Ishitani Silva, Naoki Koshimoto, Shota Miyazaki, Yasushi Muraki, Tutumi Nagai, Kansuke Nunota, Greg Olmschenk, Clément Ranc, Nicholas J. Rattenbury, Yuki Satoh, Takahiro Sumi, Daisuke Suzuki, Sean K. Terry, Paul J. Tristram, Aikaterini Vandorou, Hibiki Yama, (The MOA Collaboration)   +45 more
doaj   +3 more sources

Single Photon Kilohertz Frame Rate Imaging of Neural Activity. [PDF]

Adv Sci (Weinh), 2022
The high temporal precision of single photon avalanche diodes (SPADs) is leveraged to record neural activity reported by genetically encoded voltage indicators. Subthreshold and spiking activity of single neurons is resolved with shot noise limited signals at frame rates of up to 10 kHz.
Tian T, Yuan Y, Mitra S, Gyongy I, Nolan MF.   +4 more
europepmc   +2 more sources

Binary-lens Microlensing Degeneracy: Impact on Planetary Sensitivity and Mass-ratio Function

The Astronomical Journal
Gravitational microlensing is a unique method for discovering cold planets across a broad mass range. Reliable statistics of the microlensing planets require accurate sensitivity estimates.
Yuxin Shang, Hongjing Yang, Jiyuan Zhang, Shude Mao, Andrew Gould, Weicheng Zang, Qiyue Qian, Jennifer C. Yee   +7 more
doaj   +3 more sources

The road toward imaging a black hole: A personal perspective

Natural Sciences, Volume 2, Issue 4, October 2022., 2022
The article describes the authors personal journey towards developig the Event Horizon Telescope and the first image of a black hole. Left: predcition made by the author and collaborators proposing the black hole imaging in 2000. Right: the two images observed and published by the Event Horizon Telescope in 2019 and 2022.
Heino Falcke
wiley   +1 more source

Kepler Rotation Effects on the Binary-Lens Microlensing Events [PDF]

Progress of Theoretical Physics, 1999
24 pages, 8 figures, accepted in Progress of Theoretical Physics Vol ...
Ioka, K., Nishi, R., Kan-ya, Y.
openaire   +2 more sources

Distribution of caustic-crossing intervals for Galactic binary-lens microlensing events [PDF]

Monthly Notices of the Royal Astronomical Society, 2000
Detection of caustic crossings of binary-lens gravitational microlensing events is important because by detecting them one can obtain useful information both about the lens and source star. In this paper, we compute the distribution of the intervals between two successive caustic crossings, $f(t_{\rm cc})$, for Galactic bulge binary-lens events to ...
Han, Cheongho, Park, Seong-Hong, Lee, Yong-Sam   +2 more
openaire   +2 more sources

Compact binaries through a lens: Silent versus detectable microlensing for the LIGO-Virgo-KAGRA gravitational wave observatories

Physical Review D, 2023
17 pages, 12 Figures. Updated References. Submitted to Phys.
Ruxandra Bondarescu, Helena Ubach, Oleg Bulashenko, Andrew Lundgren   +3 more
openaire   +3 more sources

Rapidly Rotating Lenses: Repeating features in the lightcurves of short period binary microlenses [PDF]

, 2011
Microlensing is most sensitive to binary lenses with relatively large orbital separations, and as such, typical binary microlensing events show little or no orbital motion during the event.
Albrow, Alcock, An, Batista, Beaulieu, Beaulieu, Bennett, Bennett, Bennett, Bennett, Bennett, Bozza, Buchalter, Cherepashchuk, Dominik, Dominik, Dong, Dubath, Duquennoy, Eamonn Kerins, Erdl, Gaudi, Gaudi, Gould, Gould, Gould, Griest, Han, Han, Hwang, Ioka, Kerins, Konno, Kozłowski, Kubas, Liebes, Mao, Mao, Marshall, Matthew T. Penny, Nemiroff, Paczyński, Penny, Poindexter, Raghavan, Rahvar, Rattenbury, Refsdal, Refsdal, Robin, Ryu, Schneider, Shude Mao, Skowron, Smith, Smith, Smith, Smith, Smith, Udalski, Udalski, Witt, Witt, Zheng   +63 more
core   +3 more sources

Combined Analysis of the Binary-Lens Caustic-Crossing Event MACHO 98-SMC-1 [PDF]

, 1999
We fit the data for the binary-lens microlensing event MACHO 98-SMC-1 from 5 different microlensing collaborations and find two distinct solutions characterized by binary separation d and mass ratio q: (d,q)=(0.54,0.50) and (d,q)=(3.65,0.36), where d is ...
A. Bouquet, A. C. Becker, A. Gould, A. J. Drake, A. Kim, A. Milsztajn, A. Tomaney, A. Udalski, A. Vidal‐Madjar, A. W. Rodgers, A. Williams, Afonso C., B. A. Peterson, B. Goldman, B. R. Johnson, B. S. Gaudi, C. Afonso, C. Alard, C. Alcock, C. Coutures, C. Loup, C. Magneville, C. W. Stubbs, D. Alves, D. Graff, D. Hardin, D. L. DePoy, D. Minniti, D. P. Bennett, Dominik M., Dominik M., Dominik M., E. Aubourg, E. Lesquoy, E. Maurice, F. Bauer, F. Couchot, F. Derue, G. Pietrzyński, J. A. R. Caldwell, J. Andersen, J. B. Marquette, J. C. Hamilton, J. de Kat, J. F. Glicenstein, J. Greenhill, J. Haissinski, J. Menzies, J. N. Albert, J. P. Beaulieu, J. Quinn, J. Rich, K. C. Freeman, K. C. Sahu, K. Griest, K. H. Cook, K. Hill, K. R. Pollard, K. Zebruń, L. J. King, L. Prevot, L. Vigroux, M. D. Albrow, M. Dominik, M. Gros, M. J. Lehner, M. Kubiak, M. Moniez, M. R. Pratt, M. Spiro, M. Szymański, N. Palanque‐Delabrouille, N. Regnault, O. Perdereau, P. B. Stetson, P. Bareyre, P. C. Fragile, P. D. Sackett, P. J. Quinn, P. Vermaak, P. Woźniak, R. A. Allsman, R. Ansari, R. Ferlet, R. M. Naber, R. Martin, R. W. Pogge, R. Watson, S. Char, S. H. Rhie, S. Kane, S. L. Marshall, S. Zylberajch, T. Lasserre, T. S. Axelrod, T. Vandehei, Udalski A., Udalski A., W. Sutherland, X. Charlot   +99 more
core   +4 more sources