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Optically Selected BL Lacertae Candidates from the Sloan Digital Sky Survey Data Release Seven
Richard M. Plotkin, S. F. Anderson, W. N. Brandt +18
We present a sample of 723 optically selected BL Lac candidates from the SDSS DR7 spectroscopic database encompassing 8250 deg^2 of sky; our sample constitutes one of the largest u…
Cosmic Evolution of Star Formation In SDSS Quasar Hosts Since z=1
Yong Shi, George H. Rieke, Patrick Ogle +2
We present Spitzer IRS observations of a complete sample of 57 SDSS type-1 quasars at z~1. Aromatic features at 6.2 and/or 7.7 um are detected in about half of the sample and show…
Calibration of [O IV] 26 micron as a Measure of Intrinsic AGN Luminosity
J. R. Rigby, A. M. Diamond-Stanic, G. Aniano
We compare [O IV] 25.89 micron emission line luminosities with very hard (10-200 keV) X-rays from Swift, Integral, and BeppoSAX for a complete sample of 89 Seyferts from the Revise…
X-ray Insights into the Nature of Weak Emission-Line Quasars at High Redshift
Ohad Shemmer, W. N. Brandt, Scott F. Anderson +5
We present Chandra observations of nine high-redshift quasars (z=2.7-5.9) discovered by the Sloan Digital Sky Survey with weak or undetectable high-ionization emission lines in the…
An Intermediate Luminosity Transient in NGC300: The Eruption of a Dust-Enshrouded Massive Star
E. Berger, A. M. Soderberg, R. A. Chevalier +10
[abridged] We present multi-epoch high-resolution optical spectroscopy, UV/radio/X-ray imaging, and archival Hubble and Spitzer observations of an intermediate luminosity optical t…