A new method for the extraction of mid-infrared gamma-ray emitting candidate blazars

R. D'Abrusco; F. Massaro; A. Paggi; N. Masetti; G. Tosti; M. Giroletti; H. A. Smith

A new method for the extraction of mid-infrared gamma-ray emitting candidate blazars

High Energy Astrophysical Phenomena 2013-03-13 v1

Authors: R. D'Abrusco , F. Massaro , A. Paggi , N. Masetti , G. Tosti , M. Giroletti , H. A. Smith

Abstract

We present a new method for identifying blazar candidates by examining the locus, i.e. the region occupied by the Fermi gamma-ray blazars in the three-dimensional color space defined by the WISE infrared colors. This method is a refinement of our previous approach that made used of the two-dimensional projection of the the distribution of WISE gamma-ray emitting blazars (the Strip) in the three WISE color-color planes. In this paper, we define the three-dimensional locus by means of a Principal Component analysis of the the colors distribution of a large sample of blazars composed by all the ROMA-BZCAT sources with counterparts in the WISE All-Sky Catalog and associated to a gamma-ray source in the second Fermi LAT catalog (2FGL) (the WISE Fermi Blazars sample, WFB). Our new procedure, as reported in [D'Abrusco et al. 2013], yields a total completeness of c=81% and total efficiency of e=97%.

Keywords

blazar candidates WISE infrared colors principal component analysis gamma-ray blazars mid-infrared Fermi LAT ROMA-BZCAT completeness and efficiency

Cite

@article{arxiv.1303.2656,
  title  = {A new method for the extraction of mid-infrared gamma-ray emitting candidate blazars},
  author = {R. D'Abrusco and F. Massaro and A. Paggi and N. Masetti and G. Tosti and M. Giroletti and H. A. Smith},
  journal= {arXiv preprint arXiv:1303.2656},
  year   = {2013}
}

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2012 Fermi Symposium proceedings - eConf C121028

A new method for the extraction of mid-infrared gamma-ray emitting candidate blazars

Abstract

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