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The study of variability of 8 blazar candidates among the Fermi-LAT unidentified gamma-ray sources

Published online by Cambridge University Press:  29 January 2021

Pheneas Nkundabakura ,
Jean D’amour Kamanzi ,
Jean D. Mbarubucyeye  and
Tom Mutabazi
Pheneas Nkundabakura
Affiliation:
University of Rwanda, College of Education, P.O. Box 5039, Kigali, Rwanda
Jean D’amour Kamanzi
Affiliation:
Mbarara University of Science and Technology, Department of Physics, Mbarara, Uganda
Jean D. Mbarubucyeye
Affiliation:
University of Rwanda, College of Education, P.O. Box 5039, Kigali, Rwanda Deutsches Elektronen-Synchrotron (DESY), Platanenallee 6, 15738 Zeuthen, Germany
Tom Mutabazi
Affiliation:
Mbarara University of Science and Technology, Department of Physics, Mbarara, Uganda
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Abstract

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We discuss the time-series behavior of 8 extragalactic 3FGL sources away from the Galactic plane (i.e., |b|⩾10°) whose uncertainty ellipse contains a single X-ray and one radio source. The analysis was done using the standard Fermi ScienceTools, package of version v10r0p5. The results show that sources in the study sample display a slight indication of flux variability in γ-ray on monthly timescale. Furthermore, based on the object location on the variability index versus spectral index diagram, the positions of 4 objects in the sample were found to fall in the region of the already known BL Lac positions.

Keywords

galaxies: activegalaxies: jetsgamma rays: galaxiesBL Lacertae objects: generalradiation mechanism: non-thermal
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S356: Nuclear Activity in Galaxies Across Cosmic Time , October 2019 , pp. 132 - 136
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

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