2025AJ....169..170R

Query : 2025AJ....169..170R

2025AJ....169..170R - Astron. J., 169, 170 (2025/March-0)

A Differentiable Binary Microlensing Model Using Adaptive Contour Integration Method.

REN H. and ZHU W.

Abstract (from CDS):

We present microlux, which is a Jax-based code that can compute the binary microlensing light curve and its derivatives both efficiently and accurately. The key feature of microlux is the implementation of a modified version of the adaptive sampling algorithm that was originally proposed by V. Bozza to account for the finite-source effect most efficiently. The efficiency and accuracy of microlux have been verified across the relevant parameter space for binary microlensing. As a differentiable code, microlux makes it possible to apply gradient-based algorithms to the search and posterior estimation of the microlensing modeling. As an example, we use microlux to model a real microlensing event and infer the model posterior via both Fisher information matrix and Hamiltonian Monte Carlo, neither of which would have been possible without access to accurate model gradients.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Gravitational microlensing - Binary lens microlensing - Algorithms - Markov chain Monte Carlo

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 OGLE-2019-BLG-0505 * 17 53 32.140 -31 33 18.08           ~ 9 0

Query : 2025AJ....169..170R

Basic data :
OGLE-2019-BLG-0505 -- Star
Other object types: otypes_help 		* (), Lev (KMT,MOA,...)
ICRS coord. (ep=J2000) : 		17 53 32.140 -31 33 18.08 [ ] D 2021AJ....162...17K
FK4 coord. (ep=B1950 eq=1950) : 		17 50 17.355 -31 32 42.68 [ ]
Gal coord. (ep=J2000) : 		358.630137 -02.811542 [ ]
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Identifiers (3) :
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KMT-2019-BLG-0371 MOA 2019-BLG-168 OGLE-2019-BLG-0505

References (9 between 1850 and 2026) (Total 9)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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