65 citations · 172 across the 5 of their papers we have counts for
5 papers
Differential X-ray Absorption and Dust-To-Gas Ratios of the Lens Galaxies SBS0909+523, FBQS0951+2635, and B1152+199
Xinyu Dai, Christopher S. Kochanek
We analyzed Chandra observations of three gravitational lenses, SBS0909+523, FBQS0951+2635, and B1152+199, to measure the differential X-ray absorption and the dust-to-gas ratio of…
Dependence of the BALQSO fraction on Radio Luminosity
Francesco Shankar, Xinyu Dai, Gregory R. Sivakoff
We find that the fraction of classical Broad Absorption Line quasars (BALQSOs) among the FIRST radio sources in the Sloan Data Release 3, is 20.5^{+7.3}_{-5.9}% at the faintest rad…
Variable X-ray Absorption toward Gravitationally-Lensed Blazar PKS1830-211
Xinyu Dai, Smita Mathur, George Chartas +2
We present X-ray spectral analysis of five Chandra and XMM-Newton observations of the gravitationally-lensed blazar PKS1830-211 from 2000 to 2004. We show that the X-ray absorption…
Optical and X-Ray Observations of GRB 060526: A Complex Afterglow Consistent with An Achromatic Jet Break
X. Dai, J. P. Halpern, N. D. Morgan +5
We obtained 98 R-band and 18 B, r', i' images of the optical afterglow of GRB 060526 (z=3.21) with the MDM 1.3m, 2.4m, and the PROMPT telescopes in Cerro Tololo over the 5 nights f…
Turning AGN Microlensing From a Curiosity Into a Tool
C. S. Kochanek, X. Dai, C. Morgan +3
Microlensing of gravitationally lensed quasars by the stars in the foreground lens galaxy can be used to probe the nature of dark matter, to determine the mean stellar mass in the…