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The Sloan Digital Sky Survey quasar catalog: ninth data release
Isabelle Pâris, Patrick Petitjean, Eric Aubourg +73
We present the Data Release 9 Quasar (DR9Q) catalog from the Baryon Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky Survey III. The catalog includes all BOSS objec…
Broad Absorption Line Disappearance on Multi-Year Timescales in a Large Quasar Sample
N. Filiz Ak, W. N. Brandt, P. B. Hall +16
We present 21 examples of C IV Broad Absorption Line (BAL) trough disappearance in 19 quasars selected from systematic multi-epoch observations of 582 bright BAL quasars (1.9 < z <…
Atmospheric PSF Interpolation for Weak Lensing in Short Exposure Imaging Data
C. Chang, P. J. Marshall, J. G. Jernigan +25
A main science goal for the Large Synoptic Survey Telescope (LSST) is to measure the cosmic shear signal from weak lensing to extreme accuracy. One difficulty, however, is that wit…
Spurious Shear in Weak Lensing with LSST
C. Chang, S. M. Kahn, J. G. Jernigan +25
The complete 10-year survey from the Large Synoptic Survey Telescope (LSST) will image 20,000 square degrees of sky in six filter bands every few nights, bringing the final…
PHL 1811 Analogs: A Population of X-ray Weak Quasars
Jianfeng Wu, W. N. Brandt, Patrick B. Hall +6
We report on a population of X-ray weak quasars with similar UV emission-line properties to those of the remarkable quasar PHL 1811. All radio-quiet PHL 1811 analogs are notably X-…
Broad Absorption Line Variability in Radio-Loud Quasars
B. P. Miller, C. A. Welling, W. N. Brandt +1
We present preliminary results from an investigation into broad absorption line (BAL) variability within a sample of 41 radio-loud quasars (RLQs). Using 28 new Hobby-Eberly Telesco…