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Two active states of the narrow-line gamma-ray-loud AGN GB 1310+487
K. V. Sokolovsky, F. K. Schinzel, Y. T. Tanaka +49
Previously unremarkable, the extragalactic radio source GB 1310+487 showed a gamma-ray flare on 2009 November 18, reaching a daily flux of ~10^-6 photons/cm^2/s at energies E>100 M…
Photometrically Triggered Keck Spectroscopy of Fermi BL Lac Objects
Michael S. Shaw, Alexei V. Filippenko, Roger W. Romani +2
We report on Keck spectra of ten Fermi blazars. J0622+3326, previously unobserved, is shown to be a flat-spectrum radio quasar at redshift z=1.062. The others are known BL Lac-type…
Spectroscopy of The Largest Ever Gamma-ray Selected BL Lac Sample
Michael S. Shaw, Roger W. Romani, Garret Cotter +7
We report on spectroscopic observations covering most of the 475 BL Lacs in the 2nd Fermi LAT catalog of AGN. Including archival measurements (correcting several erroneous literatu…
Assessing the Significance of Apparent Correlations Between Radio and Gamma-ray Blazar Fluxes
V. Pavlidou, J. L. Richards, W. Max-Moerbeck +13
Whether a correlation exists between the radio and gamma-ray flux densities of blazars is a long-standing question, and one that is difficult to answer confidently because of vario…
Spectroscopy of Broad Line Blazars from 1LAC
Michael S. Shaw, Roger W. Romani, Garret Cotter +7
We report on optical spectroscopy of 165 Flat Spectrum Radio Quasars (FSRQs) in the Fermi 1LAC sample, which have helped allow a nearly complete study of this population. Fermi FSR…
The Orbit and Companion of Probable gamma-ray Pulsar J2339-0533
Roger W. Romani, Michael S. Shaw
We have measured dramatic flux and spectral variations through the 0.193d orbit of the optical counterpart of the unidentified gamma-ray source 0FGL J2339.8-0530. This compact obje…