Results 21 to 30 of about 2,208 (72)

MEDEA: a real time imaging pipeline for pixel lensing [PDF]

, 2002
Pixel lensing is a technique used to search for baryonic components of dark matter (MACHOs) and allows to detect microlensing events even when the target galaxies are not resolved into individual stars. Potentially, it has the advantage to provide higher
Alcock, Ansari, Auborg, Auriere, Baillon, Calchi Novati, Capozziello, Di Stefano, Dominik, Dominik, Durbin, Gerardo Iovane, Giuseppe Longo, Griest, Han, Jordan, Modjaz, Paczynski, Salvatore Capozziello, Schneider, Sedmak, Sedmak, Udalski, Witt   +23 more
core   +2 more sources

WFIRST Ultra-Precise Astrometry I: Kuiper Belt Objects [PDF]

, 2014
I show that the WFIRST microlensing survey will enable detection and precision orbit determination of Kuiper Belt Objects (KBOs) down to H_=28.2 over an effective area of about 17 sq.deg. Typical fractional period errors will be about 1.5% x 10^(0.4(H-28.
Gould, Andrew
core   +1 more source

Gravitational Microlensing by Neutron Stars and Radio Pulsars: Event Rates, Timescale Distributions, and Mass Measurements

, 2015
We investigate properties of Galactic microlensing events in which a stellar object is lensed by a neutron star. For an all-sky photometric microlensing survey, we determine the number of lensing events caused by $\sim10^{5}$ potentially-observable radio
Dai, Shi, Hobbs, George, Lin, Mengxiang, Smith, Martin C., Xu, Renxin, Yue, Youling   +5 more
core   +1 more source

Bringing closure to microlensing mass measurement [PDF]

, 2002
Interferometers offer multiple methods for studying microlensing events and determining the properties of the lenses. We investigate the study of microlensing events with optical interferometers, focusing on narrow-angle astrometry, visibility, and ...
Baldwin J. E., Benjamin F. Lane, Hog E., Jennison R. C., Neal Dalal, Shaklan S., Shao M., Shao M., Tango W. J.   +8 more
core   +2 more sources

Single-epoch and Differential Astrometric Microlensing of Quasars

The Astrophysical Journal
We propose and discuss a new experimental approach to measure the centroid shift induced by gravitational microlensing in the images of lensed quasars (astrometric microlensing).
R. Forés-Toribio, E. Mediavilla, J. A. Muñoz, J. Jiménez-Vicente, C. Fian, C. del Burgo   +5 more
doaj   +1 more source

Angular Radii of Stars via Microlensing

, 2002
We outline a method by which the angular radii of giant and main sequence stars in the Galactic bulge can be measured to a few percent accuracy. The method combines ground-based photometry of caustic-crossing bulge microlensing events, with a handful of ...
B. Scott Gaudi, Chang K., Cheongho Han, David S. Graff, Dominik M., Dominik M., Dominik M., Mao S., Richichi A., Schneider P., Schneider P., Schneider P., Udalski A., Udalski A., Wozniak P. R.   +14 more
core   +1 more source

Exoplanet Detection Techniques [PDF]

, 2014
We are still in the early days of exoplanet discovery. Astronomers are beginning to model the atmospheres and interiors of exoplanets and have developed a deeper understanding of processes of planet formation and evolution.
Fischer, Debra A., Howard, Andrew W., Laughlin, Greg P., Macintosh, Bruce, Mahadevan, Suvrath, Sahlmann, Johannes, Yee, Jennifer C.   +6 more
core   +3 more sources

Analysis of the Full Spitzer Microlensing Sample. I. Dark Remnant Candidates and Gaia Predictions

The Astrophysical Journal
In the pursuit of understanding the population of stellar remnants within the Milky Way, we analyze the sample of ∼950 microlensing events observed by the Spitzer Space Telescope between 2014 and 2019.
Krzysztof A. Rybicki, Yossi Shvartzvald, Jennifer C. Yee, Sebastiano Calchi Novati, Eran O. Ofek, Ian A. Bond, Charles Beichman, Geoff Bryden, Sean Carey, Calen Henderson, Wei Zhu, Michael M. Fausnaugh, Benjamin Wibking, The Spitzer Team, Andrzej Udalski, Radek Poleski, Przemek Mróz, Michał K. Szymański, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Jan Skowron, Krzysztof Ulaczyk, Patryk Iwanek, Marcin Wrona, The OGLE Collaboration, Yoon-Hyun Ryu, Michael D. Albrow, Sun-Ju Chung, Andrew Gould, Cheongho Han, Kyu-Ha Hwang, Youn Kil Jung, In-Gu Shin, Hongjing Yang, Weicheng Zang, 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, Fumio Abe, Richard Barry, David P. Bennett, Aparna Bhattacharya, Akihiko Fukui, Ryusei Hamada, Shunya Hamada, Naoto Hamasaki, Yuki Hirao, Stela Ishitani Silva, Yoshitaka Itow, Rintaro Kirikawa, Naoki Koshimoto, Yutaka Matsubara, Shota Miyazaki, Yasushi Muraki, Tutumi Nagai, Kansuke Nunota, Greg Olmschenk, Clement Ranc, Nicholas J. Rattenbury, Yuki K. Satoh, Takahiro Sumi, Daisuke Suzuki, Paul. J. Tristram, Aikaterini Vandorou, Hibiki Yama, MOA collaboration, Łukasz Wyrzykowski, Kornel Howil, Katarzyna Kruszyńska   +76 more
doaj   +1 more source

NASA ExoPAG Study Analysis Group 11: Preparing for the WFIRST Microlensing Survey [PDF]

, 2014
NASA's proposed WFIRST-AFTA mission will discover thousands of exoplanets with separations from the habitable zone out to unbound planets, using the technique of gravitational microlensing.
Albrow, Michael, Barry, Richard K., Bennett, David, Bryden, Geoff, Chung, Sun-Ju, Gaudi, B. Scott, Gehrels, Neil, Gould, Andrew, Penny, Matthew T., Rattenbury, Nicholas, Ryu, Yoon-Hyun, Skowron, Jan, Street, Rachel, Sumi, Takahiro, Yee, Jennifer C.   +14 more
core  

Gravitational Microlensing Near Caustics I: Folds

, 2002
We study the local behavior of gravitational lensing near fold catastrophes. Using a generic form for the lensing map near a fold, we determine the observable properties of the lensed images, focusing on the case when the individual images are unresolved,
A. O. Petters, B. Scott Gaudi, Hardy S. J., Koopmans L. V. E., Paczynski B., Schmidt R., Udalski A., Witt H.   +7 more
core   +3 more sources