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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

References

Acero, F., Ackermann, M., Ajello, M., et al. 2015, ApJS, 218, 2310.1088/0067-0049/218/2/23CrossRefGoogle Scholar
Ackermann, M., Ajello, M., Allafort, A., et al. 2012 ApJ, 753, 8310.1088/0004-637X/753/1/83CrossRefGoogle Scholar
Ackermann, M., Ajello, M., Atwood, W. B., et al. 2015, ApJ, 810, 1410.1088/0004-637X/810/1/14CrossRefGoogle Scholar
De Cicco, D., Paolillo, M., Covone et al. 1995, A&A, 574, A112Google Scholar
Ferrara, E. C., Mirabal, N. R., & Fermi-LAT Collaboration 2015, in American Astronomical Society Meeting Abstracts # 225. p. 336.02Google Scholar
Mbarubucyeye, J. D., Krauß, F., & Nkundabakura, P. 2019, in prep…, MNRASGoogle Scholar
Massaro, F., D’Abrusco, R., Tosti, G., et al. 2012 ApJ, 752, 6110.1088/0004-637X/752/1/61CrossRefGoogle Scholar
Mirabal, N., Fras-Martinez, V., Hassan, T., et al. 2012 MNRAS, 424, L6410.1111/j.1745-3933.2012.01287.xCrossRefGoogle Scholar
Nolan, P. L., Tompkins, W. F., Grenier et al. 2003, ApJ, 597, 61510.1086/378353CrossRefGoogle Scholar
Paiano, S., Falomo, R., Franceschini, A., et al. 2017 ApJ, 851, 13510.3847/1538-4357/aa9af4CrossRefGoogle Scholar
The Fermi-LAT collaboration. 2019, arXiv e-prints, arXiv:1902.10045Google Scholar
Zechlin, H.-S. & Horns, D. 2015, J. Cosmology Astropart. Phys., 2, E0110.1088/1475-7516/2015/02/E01CrossRefGoogle Scholar
Ulrich, M. H., Maraschi, L., & Urry, C. W. 1997. ARA&A, 35, 445–50210.1146/annurev.astro.35.1.445CrossRefGoogle Scholar
Urry, C. M. & Padovani, P. 1995, PASP, 107, 80310.1086/133630CrossRefGoogle Scholar