Results 21 to 30 of about 3,356 (111)

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

Effect of a Wide Binary Companion to the Lens on the Astrometric Behavior of Gravitational Microlensing Events [PDF]

The Astrophysical Journal, 2002
In this paper, we investigate the effect of a wide binary companion of the lens on the astrometric behavior of Galactic gravitational microlensing events and compare it to the effect on the photometric behavior. We find that the wide binary companion of the lens can affect the centroid motion of images substantially even if the corresponding light ...
An, Jin H., Han, Cheongho
openaire   +2 more sources

Detectability of Orbital Motion in Stellar Binary and Planetary Microlenses [PDF]

, 2010
A standard binary microlensing event lightcurve allows just two parameters of the lensing system to be measured: the mass ratio of the companion to its host, and the projected separation of the components in units of the Einstein radius.
Albrow, Alcock, Alcock, Alcock, An, An, Beaulieu, Bennett, Bennett, Bennett, Binney, Bond, Cassan, Dominik, Dominik, Dong, Dong, Duquennoy, Eamonn Kerins, Erdl, Fischer, Gaudi, Gaudi, Gould, Gould, Gould, Gould, Gould, Griest, Griest, Han, Han, Han, Han, Holtzman, Hwang, Ioka, James, Janczak, Jaroszynski, Jaroszynski, Jaroszynski, Jaroszynski, Kim, Kubas, Lada, Mao, Mao, Matthew T. Penny, Nemiroff, Newcombe, Newcombe, Paczyński, Park, Rahvar, Rattenbury, Refsdal, Ryu, Sako, Schechter, Shude Mao, Skowron, Smith, Smith, Sumi, Sumi, Sumi, Udalski, Udalski, Udalski, Wilson, Witt, Witt   +72 more
core   +3 more sources

Possible Gravitational Microlensing Events in the Optical Lightcurve of Active Galaxy S5 0716+714

The Astrophysical Journal, 2023
A well-known active galaxy of the blazar type, S5 0716+714, is characterized by a particularly high-variability duty cycle on short timescales at optical frequencies.
D. Ł. Król, Ł. Stawarz, J. Krzesinski, C. C. Cheung   +3 more
doaj   +1 more source

Rapid analysis of binary lens gravitational microlensing light curves [PDF]

Monthly Notices of the Royal Astronomical Society, 2003
A new algorithm for the autonomous fitting of light curves of gravitational microlensing by binary lenses is presented here. The algorithm relies on the combination of artificial neural networks with a conventional amoeba (downhill simplex) method to achieve a success rate of 68 per cent using strict success criteria, in an average fitting time of 48 s
openaire   +1 more source

Orbital motion effects in astrometric microlensing [PDF]

, 2014
We investigate lens orbital motion in astrometric microlensing and its detectability. In microlensing events, the light centroid shift in the source trajectory (the astrometric trajectory) falls off much more slowly than the light amplification as the ...
Sajadian, Sedighe
core   +1 more source

TWO STARS TWO WAYS: CONFIRMING A MICROLENSING BINARY LENS SOLUTION WITH A SPECTROSCOPIC MEASUREMENT OF THE ORBIT [PDF]

The Astrophysical Journal, 2016
ABSTRACT Light curves of microlensing events involving stellar binaries and planetary systems can provide information about the orbital elements of the system due to orbital modulations of the caustic structure. Accurately measuring the orbit in either the stellar or planetary case requires detailed modeling of subtle deviations in the ...
Jennifer C. Yee, John Asher Johnson, Jan Skowron, Andrew Gould, J. Sebastian Pineda, Jason Eastman, Andrew Vanderburg, Andrew Howard   +7 more
openaire   +3 more sources

OGLE-2017-BLG-1130: The First Binary Gravitational Microlens Detected From Spitzer Only [PDF]

, 2018
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 only detected by the Spitzer Space Telescope.
Albrow, M., Beichman, C., Bryden, G., Calchi Novati, S., Carey, S., Cha, S., Chung, S., Collaboration, K., Collaboration, O., Gaudi, B., Gould, A., Han, C., Henderson, C., Hwang, K., Jung, Y., Kim, D., Kim, H., Kim, S., Kozłowski, S., Lee, C., Lee, D., Lee, Y., Mao, S., Mróz, P., Park, B., Pawlak, M., Pietrukowicz, P., Pogge, R., Poleski, R., Ryu, Y., Shin, I., Shvartzvald, Y., Skowron, J., Soszyński, I., Szymański, M., Team, S., Udalski, A., Ulaczyk, K., Wang, T., Yee, J., Zang, W., Zhu, W.   +41 more
core   +2 more sources

Dark Matter Halos from the Inside Out

Advances in Astronomy, Volume 2011, Issue 1, 2011., 2011
The balance of evidence indicates that individual galaxies and groups or clusters of galaxies are embedded in enormous distributions of cold, weakly interacting dark matter. These dark matter “halos” provide the scaffolding for all luminous structures in the universe, and their properties comprise an essential part of the current cosmological model.
James E. Taylor, Rob Ivison
wiley   +1 more source