Search for gamma-ray counterparts of newly discovered radio astrophysical sources

• Autores: Best S., Bazo Alba J.L.
• Formato: artículo
• Fecha de Publicación: 2019
• Institución: Consejo Nacional de Ciencia Tecnología e Innovación
• Repositorio: CONCYTEC-Institucional
• Lenguaje: inglés
• OAI Identifier: oai:repositorio.concytec.gob.pe:20.500.12390/2750
• Enlace del recurso: https://hdl.handle.net/20.500.12390/2750; https://doi.org/10.22323/1.358.0553
• Nivel de acceso: acceso abierto
• Materia: Radio astronomy; Cosmic rays; Cosmology; Galaxies; https://purl.org/pe-repo/ocde/ford#1.03.08

In this paper we study two newly discovered classes of radio sources: the highly energetic, short-lived events, known as Fast Radio Bursts (FRBs), and a new category of compact sources known as Fanaroff-Riley type 0 radio galaxies (FR0s). Due to a possible catastrophic event origin for the FRBs and a previous correlation found with an FR0 in the gamma ray spectrum, it is possible that these radio sources could also emit high energy photons in the Fermi-LAT satellite energy range (20 MeV - 300GeV). Here we present an exhaustive time-dependent and spatial search of all up-to-date observed FRBs and FR0s, respectively. We perform a likelihood analysis of the radio sources by modeling the excess flux of gamma rays with a varying index power law function using data from Fermi-LAT and the 4FGL catalog. Sources with test statistic greater than 16 (corresponding to about 4{\sigma}) were further analyzed including 2 FRBs and 7 FR0s. No correlations with more than 5{\sigma} were found after taking into account nearby sources. Therefore, upper limits for all sources were calculated