output
19912026
Showing 2012 · astro-ph.HEShow all

39 papers · 2 filters

astro-ph.HE2012★ 44 cited

Discovery of TeV Gamma-ray Emission from CTA 1 by VERITAS

E. Aliu, S. Archambault, T. Arlen +88

We report the discovery of TeV gamma-ray emission coincident with the shell-type radio supernova remnant (SNR) CTA 1 using the VERITAS gamma-ray observatory. The source, VER J0006+…

astro-ph.HE2012

Extended X-ray emission around RRAT J1819-1458

A. Camero-Arranz, N. Rea, M. A. McLaughlin +9

We present new imaging and spectral analysis of the recently discovered extended X-ray emission around the high-magnetic-field rotating radio transient RRAT J1819-1458. We used two…

astro-ph.HE2012★ 13 cited

The extended X-ray emission around RRAT J1819-1458

A. Camero-Arranz, N. Rea, N. Bucciantini +9

We present new imaging and spectral analysis of the recently discovered extended X-ray emission around the high magnetic field rotating radio transient RRAT J1819-1458. We used two…

astro-ph.HE2012★ 150 cited

The Nearest Millisecond Pulsar Revisited with XMM-Newton: Improved Mass-Radius Constraints for PSR J0437-4715

Slavko Bogdanov

I present an analysis of the deepest X-ray exposure of a radio millisecond pulsar (MSP) to date, an X-ray Multi Mirror-Newton European Photon Imaging Camera spectroscopic and timin…

astro-ph.HE2012★ 115 cited

The Astrophysical Multimessenger Observatory Network (AMON)

M. W. E. Smith, D. B. Fox, D. F. Cowen +18

We summarize the science opportunity, design elements, current and projected partner observatories, and anticipated science returns of the Astrophysical Multimessenger Observatory…

astro-ph.HE2012★ 102 cited

Rapid TeV Gamma-Ray Flaring of BL Lacertae

T. Arlen, T. Aune, M. Beilicke +83

We report on the detection of a very rapid TeV gamma-ray flare from BL Lacertae on 2011 June 28 with the Very Energetic Radiation Imaging Telescope Array System (VERITAS). The flar…

astro-ph.HE2012★ 41 cited

Deep X-ray Observations of the Young High-Magnetic-Field Radio Pulsar J1119-6127 and Supernova Remnant G292.2-0.5

C. -Y. Ng, V. M. Kaspi, W. C. G. Ho +4

High-magnetic-field radio pulsars are important transition objects for understanding the connection between magnetars and conventional radio pulsars. We present a detailed study of…

astro-ph.HE2012★ 9 cited

VERITAS Observations of Six Bright, Hard-Spectrum Fermi-LAT Blazars

E. Aliu, S. Archambault, T. Arlen +84

We report on VERITAS very-high-energy (VHE; E>100 GeV) observations of six blazars selected from the Fermi Large Area Telescope First Source Catalog (1FGL). The gamma-ray emission…

astro-ph.HE2012★ 40 cited

The Radio Light Curve of the Gamma-Ray Nova in V407 Cyg: Thermal Emission from the Ionized Symbiotic Envelope, Devoured from Within by the Nova Blast

Laura Chomiuk, Miriam I. Krauss, Michael P. Rupen +10

We present multi-frequency radio observations of the 2010 nova event in the symbiotic binary V407 Cygni, obtained with the Karl G. Jansky Very Large Array and spanning 1-45 GHz and…

astro-ph.HE2012★ 3 cited

Investigating the Optical Counterpart Candidates of Four INTEGRAL Sources localized with Chandra

Mehtap Özbey Arabacı, Emrah Kalemci, John A. Tomsick +5

We report on the optical spectroscopic follow up observations of the candidate counterparts to four INTEGRAL sources: IGR J04069+5042, IGR J06552-1146, IGR J21188+4901 and IGR J220…

astro-ph.HE2012★ 17 cited

Search for a correlation between very-high-energy gamma rays and giant radio pulses in the Crab pulsar

E. Aliu, S. Archambault, T. Arlen +87

We present the results of a joint observational campaign between the Green Bank radio telescope and the VERITAS gamma-ray telescope, which searched for a correlation between the em…

astro-ph.HE2012★ 51 cited

Radio Detection of the Fermi LAT Blind Search Millisecond Pulsar J1311-3430

P. S. Ray, S. M. Ransom, C. C. Cheung +15

We report the detection of radio emission from PSR J1311-3430, the first millisecond pulsar discovered in a blind search of Fermi Large Area Telescope (LAT) gamma-ray data. We dete…

astro-ph.HE2012★ 80 cited

Electron-positron flows around magnetars

Andrei M. Beloborodov

The twisted magnetospheres of magnetars must sustain a persistent flow of electron-positron plasma. The flow dynamics is controlled by the radiation field around the hot neutron st…

astro-ph.HE2012★ 29 cited

Chandra observations of SGR 1627-41 near quiescence

Hongjun An, Victoria M. Kaspi, John A. Tomsick +4

We report on an observation of SGR 1627-41 made with the Chandra X-ray Observatory on 2011 June 16. Approximately three years after its outburst activity in 2008, the source's flux…

astro-ph.HE2012★ 113 cited

Constraints on Cosmic Rays, Magnetic Fields, and Dark Matter from Gamma-Ray Observations of the Coma Cluster of Galaxies with VERITAS and Fermi

T. Arlen, T. Aune, M. Beilicke +81

Observations of radio halos and relics in galaxy clusters indicate efficient electron acceleration. Protons should likewise be accelerated, suggesting that clusters may also be sou…

astro-ph.HE2012★ 49 cited

PSR J1838-0537: Discovery of a young, energetic gamma-ray pulsar

H. J. Pletsch, L. Guillemot, B. Allen +12

We report the discovery of PSR J1838-0537, a gamma-ray pulsar found through a blind search of data from the Fermi Large Area Telescope (LAT). The pulsar has a spin frequency of 6.9…

astro-ph.HE2012★ 30 cited

Timing the main-sequence-star binary pulsar J1740-3052

E. C. Madsen, I. H. Stairs, M. Kramer +7

PSR J1740-3052 is a young pulsar in orbit around a companion that is most likely a B-type main-sequence star. Since its discovery more than a decade ago, data have been taken at se…

astro-ph.HE2012★ 113 cited

Regulation of the spectral peak in gamma-ray bursts

Andrei M. Beloborodov

Observations indicate that the peak of gamma-ray burst spectrum forms in the opaque region of an ultra-relativistic jet. Recent radiative transfer calculations support this picture…

astro-ph.HE2012★ 37 cited

Multiwavelength observations of the AGN 1ES 0414+009 with VERITAS, Fermi-LAT, Swift-XRT, and MDM

E. Aliu, S. Archambault, T. Arlen +85

We present observations of the BL Lac object 1ES 0414+009 in the >200 GeV gamma-ray band by the VERITAS array of Cherenkov telescopes. 1ES 0414+009 was observed by VERITAS between…

astro-ph.HE2012★ 22 cited

Fermi-LAT constraints on the Pulsar Wind Nebula nature of HESS J1857+026

R. Rousseau, M. -H. Grondin, A. Van Etten +13

Since its launch, the Fermi satellite has firmly identified 5 pulsar wind nebulae plus a large number of candidates, all powered by young and energetic pulsars. HESS J1857+026 is a…

astro-ph.HE2012★ 32 cited

Spin-Down Measurement of PSR J1813-1749: The Energetic Pulsar Powering HESS J1813-178

J. P. Halpern, E. V. Gotthelf, F. Camilo

Two new X-ray timing observations of the 44.7 ms pulsar in G12.82-0.02/HESS J1813-178 were obtained with Chandra and XMM-Newton to determine its precise spin-down rate. With a peri…

astro-ph.HE2012★ 27 cited

Localizing INTEGRAL Sources with Chandra: X-Ray and Multi-Wavelength Identifications and Energy Spectra

John A. Tomsick, Arash Bodaghee, Sylvain Chaty +5

We report on Chandra observations of 18 hard X-ray (>20 keV) sources discovered with the INTEGRAL satellite near the Galactic plane. For 14 of the INTEGRAL sources, we have uncover…

astro-ph.HE2012★ 13 cited

Dead zone in the polar-cap accelerator of pulsars

Alexander Y. Chen, Andrei M. Beloborodov

We study plasma flows above pulsar polar caps using time-dependent simulations of plasma particles in the self-consistent electric field. The flow behavior is controlled by the dim…

astro-ph.HE2012★ 31 cited

Probing the Structure of Jet Driven Core-Collapse Supernova and Long Gamma Ray Burst Progenitors with High Energy Neutrinos

Imre Bartos, Basudeb Dasgupta, Szabolcs Marka

Times of arrival of high energy neutrinos encode information about their sources. We demonstrate that the energy-dependence of the onset time of neutrino emission in advancing rela…