180 citations · 845 across the 23 of their papers we have counts for
12 papers · 1 filter
Gravitational lensing by point masses on regular grid points
Jin H. An
It is shown that gravitational lensing by point masses arranged in an infinitely extended regular lattice can be studied analytically using the Weierstrass functions. In particular…
The Chang-Refsdal Lens Revisited
J. An, N. W. Evans
This paper provides a complete theoretical treatment of the point-mass lens perturbed by constant external shear, often called the Chang-Refsdal lens. We show that simple invariant…
Simple Models for the Distribution of Dark Matter
Jin H. An, N. Wyn Evans
We introduce a simple family of models for representing the dark matter in galaxies. The potential and phase space distribution function are all elementary, while the density is cu…
Gravitational lens under perturbations: Symmetry of perturbing potentials with invariant caustics
Jin H. An
When the gravitational lensing potential can be approximated by that of circularly symmetric system affected by weak perturbations, it is found that the shape of the resulting (tan…
Microlensing Characterization of Wide-Separation Planets
Cheongho Han, B. Scott Gaudi, Jin H. An +1
With their excellent photometric precision and dramatic increase in monitoring frequency, future microlensing survey experiments are expected to be sensitive to very short time-sca…
The POINT-AGAPE Survey I: The Variable Stars in M31
Jin H. An, N. W. Evans, P. Hewett +14
The POINT-AGAPE collaboration has been monitoring M31 for three seasons with the Wide Field Camera on the Isaac Newton Telescope. In each season, data are taken for one hour per ni…