130 citations · 448 across the 9 of their papers we have counts for
16 papers
The Rapidly Flaring Afterglow of the Very Bright and Energetic GRB 070125
Adria C. Updike, Joshua B. Haislip, Melissa C. Nysewander +52
We report on multi-wavelength observations, ranging from the X-ray to radio wave bands, of the IPN-localized gamma-ray burst GRB 070125. Spectroscopic observations reveal the prese…
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…
X-Ray and Optical Microlensing in the Lensed Quasar PG 1115+080
Christopher W. Morgan, Christopher S. Kochanek, Xinyu Dai +2
We analyzed the microlensing of the X-ray and optical emission of the lensed quasar PG 1115+080. We find that the effective radius of the X-ray emission is 1.3(+1.1 -0.5) dex small…
Confirmation of a correlation between the X-ray luminosity and spectral slope of AGNs in the Chandra Deep Fields
C. Saez, G. Chartas, W. N. Brandt +4
We present results from a statistical analysis of 173 bright radio-quiet AGNs selected from the Chandra Deep Field-North and Chandra Deep Field-South surveys (hereafter, CDFs) in t…
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…