output
19912026
Showing 2009 · astro-ph.HEShow all

8 papers · 2 filters

astro-ph.HE2009★ 92 cited

The X-ray Energy Dependence of the Relation between Optical and X-ray Emission in Quasars

M. Young, M. Elvis, G. Risaliti

We develop a new approach to the well-studied anti-correlation between the optical-to-X-ray spectral index, alpha_ox, and the monochromatic optical luminosity, l_opt. By cross-corr…

astro-ph.HE2009★ 50 cited

AGILE detection of a rapid gamma-ray flare from the blazar PKS 1510-089 during the GASP-WEBT monitoring

F. D'Ammando, G. Pucella, C. M. Raiteri +103

We report the detection by the AGILE satellite of a rapid gamma-ray flare from the powerful gamma-ray quasar PKS 1510-089, during a pointing centered on the Galactic Center region…

astro-ph.HE2009★ 25 cited

Jets in Active Galactic Nuclei

A. P. Marscher

The jets of active galactic nuclei can carry a large fraction of the accreted power of the black-hole system into interstellar and even extragalactic space. They radiate profusely…

astro-ph.HE2009★ 121 cited

Disk-Jet Connection in the Radio Galaxy 3C 120

Ritaban Chatterjee, Alan P. Marscher, Svetlana G. Jorstad +33

We present the results of extensive multi-frequency monitoring of the radio galaxy 3C 120 between 2002 and 2007 at X-ray, optical, and radio wave bands, as well as imaging with the…

astro-ph.HE2009★ 36 cited

Search for Astrophysical Neutrino Point Sources at Super-Kamiokande

E. Thrane

It has been hypothesized that large fluxes of neutrinos may be created in astrophysical "cosmic accelerators." The primary background for a search for astrophysical neutrinos comes…

astro-ph.HE2009★ 97 cited

The Fifth Data Release Sloan Digital Sky Survey/XMM-Newton Quasar Survey

M. Young, M. Elvis, G. Risaliti

We present a catalog of 792 DR5 SDSS quasars with optical spectra that have been observed serendipitously in the X-rays with the \emph{XMM-Newton}. These quasars cover a redshift r…

astro-ph.HE2009★ 9 cited

Search for Neutrinos from GRB 080319B at Super-Kamiokande

Kamiokande Collaboration, E. Thrane

We perform a search for neutrinos coincident with GRB 080319B, the brightest GRB observed to date, in a +/- 1,000 s window. No statistically significant coincidences were observed…

astro-ph.HE2009★ 32 cited

Spectral Analysis of the Accretion Flow in NGC 1052 with Suzaku

L. W. Brenneman, K. A. Weaver, M. Kadler +10

We present an analysis of the 101 ks, 2007 Suzaku spectrum of the LINER galaxy NGC 1052. The 0.5-10 keV continuum is well-modeled by a power-law modified by Galactic and intrinsic…