output
19922026
Showing 2011 · astro-ph.HEShow all

10 papers · 2 filters

astro-ph.HE2011★ 40 cited

Search for signatures of magnetically-induced alignment in the arrival directions measured by the Pierre Auger Observatory

The Pierre Auger Collaboration, P. Abreu, M. Aglietta +496

We present the results of an analysis of data recorded at the Pierre Auger Observatory in which we search for groups of directionally-aligned events (or `multiplets') which exhibit…

astro-ph.HE2011★ 80 cited

Observation of the Cosmic Ray Moon shadowing effect with ARGO-YBJ

YBJ Collaboration

Cosmic rays are hampered by the Moon and a deficit in its direction is expected (the so-called \emph{Moon shadow}). The Moon shadow is an important tool to determine the performanc…

astro-ph.HE2011★ 75 cited

Long-term monitoring of the TeV emission from Mrk 421 with the ARGO-YBJ experiment

YBJ Collaboration, B. Bartoli, P. Bernardini +105

ARGO-YBJ is an air shower detector array with a fully covered layer of resistive plate chambers. It is operated with a high duty cycle and a large field of view. It continuously mo…

astro-ph.HE2011★ 59 cited

Probing the GC-LMXB connection in NGC 1399: a wide-field study with HST and Chandra

Maurizio Paolillo, Thomas H. Puzia, Paul Goudfrooij +5

We present a wide field study of the Globular Clusters/Low Mass X-ray Binary (LMXB) connection in the giant elliptical NGC1399. The large FOV of the ACS/WFC, combined with the HST…

astro-ph.HE2011★ 167 cited

Beating the spin-down limit on gravitational wave emission from the Vela pulsar

The LIGO Scientific Collaboration, the Virgo Collaboration, J. Abadie +747

We present direct upper limits on continuous gravitational wave emission from the Vela pulsar using data from the Virgo detector's second science run. These upper limits have been…

astro-ph.HE2011★ 900 cited

PAMELA Measurements of Cosmic-ray Proton and Helium Spectra

O. Adriani, G. C. Barbarino, G. A. Bazilevskaya +62

Protons and helium nuclei are the most abundant components of the cosmic radiation. Precise measurements of their fluxes are needed to understand the acceleration and subsequent pr…

astro-ph.HE2011★ 348 cited

The cosmic-ray electron flux measured by the PAMELA experiment between 1 and 625 GeV

PAMELA Collaboration, O. Adriani, G. C. Barbarino +64

Precision measurements of the electron component in the cosmic radiation provide important information about the origin and propagation of cosmic rays in the Galaxy. Here we presen…

astro-ph.HE2011★ 89 cited

Search for First Harmonic Modulation in the Right Ascension Distribution of Cosmic Rays Detected at the Pierre Auger Observatory

The Pierre Auger Collaboration, P. Abreu, M. Aglietta +466

We present the results of searches for dipolar-type anisotropies in different energy ranges above eV with the surface detector array of the Pierre Auger Observa…

astro-ph.HE2011★ 5 cited

Gravitational and electromagnetic emission by magnetized coalescing binary systems

S. Capozziello, M. De Laurentis, I. De Martino +2

We discuss the possibility to obtain an electromagnetic emission accompanying the gravitational waves emitted in the coalescence of a compact binary system. Motivated by the existe…

astro-ph.HE2011★ 80 cited

Study of possible systematics in the L*X - Ta* correlation of Gamma Ray Bursts

M. G. Dainotti, V. F. Cardone, S. Capozziello +2

Gamma Ray Bursts (GRBs) are the most energetic sources in the universe and among the farthest known astrophysical sources. These features make them appealing candidates as standard…