Showing 2011 · astro-ph.HEShow all

9 papers · 2 filters

astro-ph.HE2011★ 192 cited

Prospects for Probing the Spacetime of Sgr A* with Pulsars

K. Liu, N. Wex, M. Kramer +2

The discovery of radio pulsars in compact orbits around Sgr A* would allow an unprecedented and detailed investigation of the spacetime of the supermassive black hole. This paper s…

astro-ph.HE2011★ 65 cited

Accelerated Orbital Expansion And Secular Spin Down of the Accreting Millisecond Pulsar SAX J1808.4-3658

A. Patruno, P. Bult, A. Gopakumar +4

The accreting millisecond pulsar SAX J1808.4-3658 has shown a peculiar orbital evolution in the past with an orbital expansion much faster than expected from standard binary evolut…

astro-ph.HE2011★ 114 cited

Multiwavelength Constraints on Pulsar Populations in the Galactic Center

R. S. Wharton, S. Chatterjee, J. M. Cordes +2

The detection of radio pulsars within the central few parsecs of the Galaxy would provide a unique probe of the gravitational and magneto-ionic environments in the Galactic Center…

astro-ph.HE2011★ 12 cited

Chandra X-ray Observations of the redshift 1.53, radio-loud quasar: 3C 270.1

Belinda J. Wilkes, Dharam V. Lal, D. M. Worrall +14

Chandra X-ray observations of the high redshift (z =1.532) radio-loud quasar 3C270.1 in 2008 February show the nucleus to have a power-law spectrum, Gamma = 1.66 +/- 0.08, typical…

astro-ph.HE2011★ 161 cited

A variable mid-infrared synchrotron break associated with the compact jet in GX 339-4

P. Gandhi, A. W. Blain, D. M. Russell +11

Many X-ray binaries remain undetected in the mid-infrared, a regime where emission from their compact jets is likely to dominate. Here, we report the detection of the black hole bi…

astro-ph.HE2011★ 25 cited

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…

astro-ph.HE2011★ 61 cited

Practical and accurate calculations of Askaryan radiation

Jaime Alvarez-Muñiz, Andrés Romero-Wolf, Enrique Zas

An in-depth characterization of coherent radio Cherenkov pulses from particle showers in dense dielectric media, referred to as the Askaryan effect, is presented. The time-domain c…

astro-ph.HE2011★ 14 cited

The First Limits on the Ultra-high Energy Neutrino Fluence from Gamma-ray Bursts

A. G. Vieregg, K. Palladino, P. Allison +34

We set the first limits on the ultra-high energy (UHE) neutrino fluence at energies greater than 10^9 GeV from gamma-ray bursts (GRBs) based on data from the second flight of the A…

astro-ph.HE2011★ 53 cited

An X-ray Imaging Survey of Quasar Jets -- Testing the Inverse Compton Model

H. L. Marshall, J. M. Gelbord, D. A. Schwartz +7

We present results from continued Chandra X-ray imaging and spectroscopy of a flux-limited sample of flat spectrum radio-emitting quasars with jet-like extended structure. X-rays a…