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Multiwavelength study of potential blazar candidates among Fermi-LAT unidentified gamma-ray sources

Published online by Cambridge University Press:  29 January 2021

Jean Damascène Mbarubucyeye ,
Felicia Krauß  and
Pheneas Nkundabakura
Jean Damascène Mbarubucyeye
Affiliation:
Deutsches Elektronen-Synchrotron (DESY), Platanenallee 6, 15738Zeuthen, Germany, email: mbjdamas@gmail.com
Felicia Krauß
Affiliation:
Department of Astronomy & Astrophysics, Pennsylvania State University, University Park, PA16801, USA email: Felicia.Krauss@psu.edu
Pheneas Nkundabakura
Affiliation:
University of Rwanda, College of Education, P.O. Box 5039, Kigali, Rwanda email: nkundapheneas@yahoo.fr
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Abstract

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Studying unidentified γ-ray sources is important as they may hide new discoveries. We conducted a multiwavelength analysis of 13 unidentified Fermi-LAT sources in the 3FGL catalogue that have no known counterparts (Unidentified Gamma-ray Sources, UnIDs). The sample was selected for sources that have a single radio and X-ray candidate counterpart in their uncertainty ellipses. The purpose of this study is to find a possible blazar signature and to model the Spectral Energy Distribution (SED) of the selected sources using an empirical log parabolic model. The results show that the synchrotron emission of all sources peaks in the infrared (IR) band and that the high-energy emission peaks in MeV to GeV bands. The SEDs of sources in our sample are all blazar like. In addition, the peak position of the sample reveals that 6 sources (46.2%) are Low Synchrotron Peaked (LSP) blazars, 4 (30.8%) of them are High Synchrotron Peaked (HSP) blazars, while 3 of them (23.0%) are Intermediate Synchrotron Peaked (ISP) blazars.

Keywords

radiation mechanism: non-thermalgamma-rays: galaxiesgalaxies: active galaxiesBL Lacertae objects: generalX-ray: generalmethods: data analysis
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S356: Nuclear Activity in Galaxies Across Cosmic Time , October 2019 , pp. 326 - 328
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

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