Results 31 to 40 of about 142 (95)

PLANET observations of microlensing event OGLE-1999-BUL-23: limb-darkening measurement of the source star [PDF]

, 2001
We present PLANET observations of OGLE-1999-BUL-23, a binary-lens microlensing event toward the Galactic bulge. PLANET observations in the I and V bands cover the event from just before the first caustic crossing until the end of the event. In particular,
Gaudi, BS (15484505), Sackett, PD (15484526), Watson, RD (15482654), Caldwell, JAR (15484496), Menzies, J (15484517), Gould, A (15484508), Greenhill, JG (15480797), Kane, S (15484511), Albrow, MD (15484493), An, J (15489203), DePoy, DL (15484499), Martin, R (15484514), Jean-Philippe Beaulieu (14731417), Dominik, M (15484502), Kym Hill (14739118), Sahu, KC (15484529), Williams, A (15484535), Pogge, RW (15484520), Vermaak, P (15484532), Pollard, KR (15484523)   +19 more
core   +5 more sources

First microlens mass measurement:Planet photometry of EROS BLG-2000-5 [PDF]

, 2002
We analyze PLANET photometric observations of the caustic-crossing binary lens microlensing event, EROS BLG-2000-5, and find that modeling the observed light curve requires incorporation of the microlens parallax and the binary orbital motion.
Menzies, J, Williams, A, Gaudi, BS, Kane, S, Watson, R, Gould, A, Albrow, MD, Hill, K, Pollard, KR, DePoy, DL, An, JH, Pogge, RW, Beaulieu, JP, Caldwell, JAR, Martin, R, Dominik, M, Sackett, PD, Sahu, KC, Vermaak, P, Greenhill, J   +19 more
core   +5 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

A Fast Approximate Approach to Microlensing Survey Analysis [PDF]

, 2019
Microlensing can be used to discover exoplanets of a wide range of masses with orbits beyond ∼1 au, and even free-floating planets. The Wide Field Infrared Survey Telescope (WFIRST) mission will use microlensing to discover approximately 1600 planets by ...
Pepper, Joshua, Penny, Matthew, Khakpash, Somayeh   +2 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

Automated Detection of Short Optical Transients of Astrophysical Origin in Real Time

Advances in Astronomy, Volume 2010, Issue 1, 2010., 2010
The detection of short optical transients of astrophysical origin in real time is an important task for existing robotic telescopes. The faster a new optical transient is detected, the earlier follow‐up observations can be started. The sooner the object is identified, the more data can be collected before the source fades away, particularly in the most
Marcin Sokołowski, Katarzyna Małek, Lech W. Piotrowski, Grzegorz Wrochna, Taro Kotani   +4 more
wiley   +1 more source

Combined analysis of the binary lens caustic crossing event MACHO-98-SMC-1 [PDF]

, 2000
We fit the data for the binary lens microlensing event MACHO 98-SMC-1 from five 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 ...
Vidal-Madjar, A, Charlot, X., Kim, A., Renault, C., Derue, F., Magneville, C, Beaulieu, J P, Prevot, L., Mansoux, B., Gould, A., Charlot, X, Ferlet, R., Afonso, C., Coutures, C., Lasserre, T, Glicenstein, JF, Alcock, C, Afonso, C, Perdereau, O, Zylberajch, S, Regnault, N., Bareyre, P, Magneville, C., Perdereau, O., Maurice, E, Beaulieu, J-P., Axelrod, TS, Albert, J-N., Zylberajch, S., Charlot, [No Value], Hardin, D., Rich, J, Hardin, D, Alves, D, Bauer, F., Alard, C., Aubourg, E., Coutures, C, Bouquet, A, Glicenstein, J F, Lesquoy, E., Becker, A C, Gros, M., Allsman, RA, Allsman, R A, Char, S, Sackett, Penny D, Alard, C, Moniez, M., Char, S., Loup, C, Becker, AC, Albert, J N, Gros, M, Hamilton, J-C., Lasserre, L., Gould, A, Hamilton, J C, Spiro, M, Haissinski, J, Aubourg, E, Peterson, BA, Andersen, J, Vigroux, L, Milsztajn, A., Loup, C., Goldman, B., Bareyre, P., Ferlet, R, Palanque-Delabrouille, N, Goldman, B, de Kat, J, Ansari, R., Maurice, E., Derue, F, Dominik, Martin, Moniez, M, Albert, JN, Lesquoy, E, Ansari, R, Kim, A, Prevot, L, Peterson, B A, Palanque-Delabrouille, N., Graff, D, Rich, J., Hamilton, JC, Haissinski, J., Marquette, J B, Couchot, F, Marquette, J-B., Vidal-Madjar, A., Milsztajn, A, Spiro, M., Graff, D., Regnault, N, Andersen, J., Marquette, JB, Szymanski, M, de Kat, J., Naber, R M, Vigrou, L., Glicenstein, J-F., Couchot, F., Bauer, F, Bouquet, A.   +105 more
core   +1 more source

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

A complete set of solutions for caustic crossing binary microlensing events [PDF]

, 1999
We present a method to analyze binary lens microlensing light curves with one well-sampled fold caustic crossing. In general, the surface of χ2 shows extremely complicated behavior over the nine-parameter space that characterizes binary lenses.
Gaudi, BS (15484505), Naber, RM (15480803), Sackett, PD (15484526), Watson, RD (15482654), Caldwell, JAR (15484496), Menzies, J (15484517), Gould, A (15484508), Greenhill, JG (15480797), Kane, S (15484511), Albrow, MD (15484493), DePoy, DL (15484499), Martin, R (15484514), Jean-Philippe Beaulieu (14731417), Dominik, M (15484502), Kym Hill (14739118), Sahu, KC (15484529), Williams, A (15484535), Pogge, RW (15484520), Vermaak, P (15484532), Pollard, KR (15484523)   +19 more
core   +4 more sources

Bayesian analysis of caustic-crossing microlensing events [PDF]

, 2010
Received; accepted Aims. Caustic-crossing binary-lens microlensing events are important anomalous events because they are capable of detecting an extrasolar planet companion orbiting the lens star.
Tsapras, Y., A. Cassan, Y. Tsapras, Kains, N., Browne, P., K. Horne, Horne, K., N. Kains, P. Browne, Cassan, A.   +9 more
core   +1 more source