0000000000275539

AUTHOR

The Argo-ybj Collaboration

showing 2 related works from this author

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

2011

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 monitors the northern sky at energies above 0.3 TeV. In this paper, we report a long-term monitoring of Mrk 421 over the period from 2007 November to 2010 February. This source was observed by the satellite-borne experiments Rossi X-ray Timing Explorer and Swift in the X-ray band. Mrk 421 was especially active in the first half of 2008. Many flares are observed in both X-ray and gamma-ray bands simultaneously. The gamma-ray flux observed by ARGO-YBJ has a clear correlation with the X-ray flux. No lag between the X-r…

media_common.quotation_subjectAstrophysics::High Energy Astrophysical PhenomenaOggetti di tipo BL LacertaeFOS: Physical sciencesFluxAstrophysics01 natural sciences7. Clean energyindividual (Markarian 421) [BL Lacertae objects]Spectral lineGamma-rays Markarian 421 BL Lacertae Resistive Plate Chamberslaw.inventionlaw0103 physical sciencesRadiative transfer010303 astronomy & astrophysicsmedia_commonHigh Energy Astrophysical Phenomena (astro-ph.HE)Physics010308 nuclear & particles physicsMarkarian 421Settore FIS/01 - Fisica SperimentaleAstronomy and Astrophysicsgeneral [gamma ray]Synchrotron3. Good healthAir shower13. Climate actionSpace and Planetary ScienceDuty cycleSkyRaggi gammaSpectral energy distributionAstrophysics - High Energy Astrophysical Phenomena
researchProduct

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

2011

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 performance of an air shower array. Indeed, the westward displacement of the shadow center, due to the bending effect of the geomagnetic field on the propagation of cosmic rays, allows the setting of the absolute rigidity scale of the primary particles inducing the showers recorded by the detector. In addition, the shape of the shadow permits to determine the detector point spread function, while the position of the deficit at high energies allows the evaluation of its absolute pointing accuracy. In this paper we present th…

Astrophysics::High Energy Astrophysical PhenomenaPhysics::Space PhysicsAstrophysics - High Energy Astrophysical PhenomenaHigh Energy Physics - Experiment
researchProduct