0000000001315665

AUTHOR

K.s. Caballero-mora

showing 3 related works from this author

A search for point sources of EeV neutrons

2012

A thorough search of the sky exposed at the Pierre Auger Cosmic Ray Observatory reveals no statistically significant excess of events in any small solid angle that would be indicative of a flux of neutral particles from a discrete source. The search covers from −90◦ to +15◦ in declination using four different energy ranges above 1 EeV (1018 eV). The method used in this search is more sensitive to neutrons than to photons. The upper limit on a neutron flux is derived for a dense grid of directions for each of the four energy ranges. These results constrain scenarios for the production of ultrahigh energy cosmic rays in the Galaxy.

AstronomyEnergy fluxAstrophysics01 natural sciences7. Clean energyNeutron fluxObservatorycosmic rays – Galaxy: disk – methods: data analysisNeutron detection010303 astronomy & astrophysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Physics[SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]Gamma rayAstrophysics::Instrumentation and Methods for AstrophysicsASTRONOMYPierre Auger ObservatoryCOSMIC-RAYSRadiación cósmicaUltra High Energy Cosmic RayComputingMethodologies_DOCUMENTANDTEXTPROCESSINGMASSIVE BLACK-HOLEFísica nuclearPierre Auger Observatory high-energy neutron sources neutron flux limitAstrophysics - High Energy Astrophysical Phenomena[PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]Astrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesCosmic rayGalaxiaGalaxy: diskcosmic rays0103 physical scienceshigh-energy neutron sourcesNeutronCosmic-ray observatoryCiencias ExactasANISOTROPY010308 nuclear & particles physicsGAMMA-RAYSAnálisis de datosAstronomyFísicaAstronomy and AstrophysicsASTROFÍSICAneutron flux limitmethods: data analysisNÊUTRONSSpace and Planetary ScienceUltra High Energy Cosmic RaysExperimental High Energy Physics[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]GALACTIC-CENTER
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3rd HAWC cat. of VHE gamma-ray sources (3HWC)

2022

We present a new catalog of TeV gamma-ray sources using 1523 days of data from the High-Altitude Water Cherenkov (HAWC) Observatory. The catalog represents the most sensitive survey of the northern gamma-ray sky at energies above several TeV, with three times the exposure compared to the previous HAWC catalog, 2HWC. We report 65 sources detected at >=5{sigma} significance, along with the positions and spectral fits for each source. The catalog contains eight sources that have no counterpart in the 2HWC catalog, but are within 1{deg} of previously detected TeV emitters, and 20 sources that are more than 1{deg} away from any previously detected TeV source. Of these 20 new sources, 14 have a p…

observational astronomyAstrophysics and AstronomyGamma-ray astronomyPhysicsGamma ray astronomyNatural Sciences
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HAWC Gamma-Ray survey, AGNs at TeV photon energies

2022

The High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory continuously detects TeV photons and particles within its large field of view, accumulating every day a deeper exposure of two-thirds of the sky. We analyzed 1523days of HAWC live data acquired over four and a half years, in a follow-up analysis of 138 nearby (z<0.3) active galactic nuclei from the Third Catalog of Hard Fermi-LAT sources culminating within 40{deg} of the zenith at Sierra Negra, the HAWC site. This search for persistent TeV emission used a maximum- likelihood analysis assuming intrinsic power-law spectra attenuated by pair production of gamma-ray photons with the extragalactic background light. HAWC clearly detec…

observational astronomyActive galactic nucleigalactic and extragalactic astronomyAstrophysics and AstronomyGamma-ray astronomyhigh energy astrophysicsPhysicsGamma ray astronomySurveysNatural Sciences
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