UNVEILING THE NATURE OF UNIDENTIFIED GAMMA-RAY SOURCES. I. A NEW METHOD FOR THE ASSOCIATION OF GAMMA-RAY BLAZARS

被引：77
作者：
D'Abrusco, R. [1 ]
Massaro, F. [2 ,3 ]
Paggi, A. [1 ]
Masetti, N. [4 ]
Tosti, G. [5 ,6 ]
Giroletti, M. [7 ]
Smith, H. A. [1 ]
机构：
[1] Harvard Smithsonian Astrophys Observ, Cambridge, MA 02138 USA
[2] SLAC Natl Lab, Menlo Pk, CA 94025 USA
[3] Kavli Inst Particle Astrophys & Cosmol, Menlo Pk, CA 94025 USA
[4] INAF IASF Bologna, I-4019 Bologna, Italy
[5] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy
[6] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy
[7] INAF Ist Radioastron, I-40129 Bologna, Italy
来源：
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2013年 / 206卷 / 02期
关键词：
BL Lacertae objects: general; catalogs; galaxies: active; gamma rays: general; infrared: general radiation mechanisms: non; thermal; ACTIVE GALACTIC NUCLEI; WISE; CATALOG; IDENTIFICATION; SELECTION; EMISSION; OBJECTS; SAMPLE; SKY;
D O I：
10.1088/0067-0049/206/2/12
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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 use of the two-dimensional projection of 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 color distribution of a large sample of blazars composed of all the ROMA-BZCAT sources with counterparts in the WISE All-Sky Catalog associated with. gamma-ray sources in the second Fermi-LAT catalog (2FGL; the WISE Fermi blazars sample, WFB). Our new procedure yields a total completeness of c(tot) similar to 81% and a total efficiency of etot similar to 97%. We also obtain local estimates of the efficiency and completeness as functions of the WISE colors and galactic coordinates of the candidate blazars. The catalog of all WISE candidate blazars associated with theWFB sample is also presented, complemented by archival multi-frequency information for the alternative associations. Finally, we apply the new association procedure to all. gamma-ray blazars in the 2FGL and provide a catalog containing all the. -ray candidate blazars selected according to our procedure.
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页数：26
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