217 citations · 4.5k across the 122 of their papers we have counts for
5 papers · 1 filter
A diagnostic test for determining the location of the GeV emission in powerful blazars
Amanda Dotson, Markos Georganopoulos, Demosthenes Kazanas +1
An issue currently under debate in the literature is how far from the black hole is the Fermi-observed GeV emission of powerful blazars emitted. Here we present a clear diagnostic…
Using Observations of Distant Quasars to Constrain Quantum Gravity
Eric S. Perlman, Y. Jack Ng, David J. E. Floyd +1
Aims. The small-scale nature of spacetime can be tested with observations of distant quasars. We comment on a recent paper by Tamburini et al. (A&A, 533, 71) which claims that Hubb…
The 2010 very high energy gamma-ray flare & 10 years of multi-wavelength observations of M 87
The H. E. S. S. Collaboration, :, A. Abramowski +442
Abridged: The giant radio galaxy M 87 with its proximity, famous jet, and very massive black hole provides a unique opportunity to investigate the origin of very high energy (VHE;…
Deep Multiwaveband Observations of the Jets of 0208-512 and 1202-262
Eric S. Perlman, Markos Georganopoulos, Herman L. Marshall +8
We present deep {\it HST, Chandra, VLA} and {\it ATCA} images of the jets of PKS 0208--512 and PKS 1202--262, which were found in a {\it Chandra} survey of a flux-limited sample of…
Broad Ly alpha Emission from Three Nearby BL Lacertae Objects
John T. Stocke, Charles W. Danforth, Eric S. Perlman
We present far-UV HST/COS spectra of four nearby BL Lac Objects. BL Lac spectra are dominated by a smooth, power-law continuum which arises in a relativistic jet. However, the spec…