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New blazar candidates from the 9Y-MST catalogue detected at energies higher than 10 GeV

  • R. CampanaEmail author
  • E. Massaro
Original Article

Abstract

We present a list of 24 new blazar candidates selected in a search for possible counterparts of spatial clusters of \(\gamma \)-ray photons in the recent 9Y-MST catalogue, at energies higher than 10 GeV and at Galactic latitudes higher than \(20^{\circ}\). 13 of these clusters are also included in the preliminary release of the 4FGL catalogue of \(\gamma \)-ray sources. The search for possible counterparts is based on the possible associations of the clusters with radio sources within a circle having a radius of \(6'\). We then investigated the possible optical or mid-IR associations of these sources, checking if they show some properties typical of new blazar candidates.

Keywords

\(\gamma \)-rays: observations \(\gamma \)-rays: source detection 

Notes

Acknowledgements

We acknowledge use of archival Fermi data. We made large use of the online version of the Roma-BZCAT and of the scientific tools developed at the ASI Space Science Data Center (SSDC), of the final release of 6dFGS archive, of the Sloan Digital Sky Survey (SDSS) archive, of the NED database and other astronomical catalogues distributed in digital form (Vizier and Simbad) at Centre de Dates astronomiques de Strasbourg (CDS) at the Louis Pasteur University. This publication makes also use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration.

Compliance with ethical standards

Conflict of Interest: The authors declare that they have no conflict of interest. Ethical approval: This article does not contain any studies with human participants or animals performed by any of the authors.

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.INAF/OAS-BolognaBolognaItaly
  2. 2.INAF/IAPSRomaItaly
  3. 3.In Unam SapientiamRomaItaly

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