▪ Abstract Deep surveys of the cosmic X-ray background are reviewed in the context of
observational progress enabled by the Chandra X-Ray Observatory and the X-Ray Multi …

ABSTRACT SDSS J015957. 64+ 003310.5 is an X-ray selected, z= 0.31 active galactic
nucleus (AGN) from the Stripe 82X survey that transitioned from a Type 1 quasar to a Type …

ABSTRACT We present 1625 new 15 GHz (2 cm) VLBA images of 295 jets associated with
active galactic nuclei (AGNs) from the MOJAVE and 2 cm VLBA surveys, spanning …

We present the fifth edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog, which is
based upon the SDSS Seventh Data Release. The catalog, which contains 105,783 …

Abstract The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its
Second Data Release. This data release consists of 3324 deg 2 of five-band (ugriz) imaging …

We determine the number counts and z= 0-5 luminosity function for a well-defined,
homogeneous sample of quasars from the Sloan Digital Sky Survey (SDSS). We …

We review past work using broad emission lines as virial estimators of black hole masses in
quasars. Basically one requires estimates of the emitting region radius and virial velocity …

We investigate the extent to which the Palomar-Green (PG) Bright Quasar Survey (BQS) is
complete and representative of the general quasar population by comparing it with imaging …

Selection of active galactic nuclei (AGNs) in the infrared facilitates the discovery of AGNs
whose optical emission is extinguished by dust. In this paper, we use the Spitzer Space …

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 …