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Multi-wavelength selection and identification of gamma-ray blazar candidates

Published online by Cambridge University Press:  24 March 2015

Alessandro Paggi ,
R. D'Abrusco ,
F. Massaro ,
M. Landoni ,
D. Milisavljevic ,
N. Masetti ,
F. Ricci ,
E. Jiménez-Bailón ,
V. Chavushyan  and
M. Giroletti
...Show all authors
Alessandro Paggi
Affiliation:
Harvard-Smithsonian Center for Astrophysics 60 Garden Street, Cambridge, MA 02138, USA email: apaggi@cfa.harvard.edu
R. D'Abrusco
Affiliation:
Harvard-Smithsonian Center for Astrophysics 60 Garden Street, Cambridge, MA 02138, USA email: apaggi@cfa.harvard.edu
F. Massaro
Affiliation:
SLAC - National Laboratory and Kavli Institute for Particle Astrophysics and Cosmology 2575 Sand Hill Road, Menlo Park, CA 94025, USA
M. Landoni
Affiliation:
Harvard-Smithsonian Center for Astrophysics 60 Garden Street, Cambridge, MA 02138, USA email: apaggi@cfa.harvard.edu INAF - Osservatorio Astronomico di Brera Via Emilio Bianchi 46, I-23807 Merate, Italy
D. Milisavljevic
Affiliation:
Harvard-Smithsonian Center for Astrophysics 60 Garden Street, Cambridge, MA 02138, USA email: apaggi@cfa.harvard.edu
N. Masetti
Affiliation:
INAF - Istituto di Astrosica Spaziale e Fisica Cosmica di Bologna via Gobetti 101, 40129, Bologna, Italy
F. Ricci
Affiliation:
Dipartimento di Matematica e Fisica, Universit Roma Tre via della Vasca Navale 84, I-00146, Roma, Italy
E. Jiménez-Bailón
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México Apdo. Postal 877, Ensenada, 22800 Baja California, México
V. Chavushyan
Affiliation:
Instituto Nacional de Astrofísica, Óptica y Electrónica Apartado Postal 51-216, 72000 Puebla, México
M. Giroletti
Affiliation:
INAF - Istituto di Astrosica Spaziale e Fisica Cosmica di Bologna via Gobetti 101, 40129, Bologna, Italy
H. A. Smith
Affiliation:
Harvard-Smithsonian Center for Astrophysics 60 Garden Street, Cambridge, MA 02138, USA email: apaggi@cfa.harvard.edu
R. Margutti
Affiliation:
Harvard-Smithsonian Center for Astrophysics 60 Garden Street, Cambridge, MA 02138, USA email: apaggi@cfa.harvard.edu
G. Tosti
Affiliation:
Dipartimento di Fisica, Università degli Studi di Perugia 06123 Perugia, Italy
J. R. Martinéz-Galarza
Affiliation:
Harvard-Smithsonian Center for Astrophysics 60 Garden Street, Cambridge, MA 02138, USA email: apaggi@cfa.harvard.edu
H. Otí-Floranes
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México Apdo. Postal 877, Ensenada, 22800 Baja California, México
J. E. Grindlay
Affiliation:
Harvard-Smithsonian Center for Astrophysics 60 Garden Street, Cambridge, MA 02138, USA email: apaggi@cfa.harvard.edu
S. Funk
Affiliation:
SLAC - National Laboratory and Kavli Institute for Particle Astrophysics and Cosmology 2575 Sand Hill Road, Menlo Park, CA 94025, USA
C. C. Cheung
Affiliation:
Space Science Division, Naval Research Laboratory Washington, DC 20375-5352, USA
L. Chomiuk
Affiliation:
Department of Physics and Astronomy, Michigan State University East Lansing, MI 48824, USA
J. Strader
Affiliation:
Department of Physics and Astronomy, Michigan State University East Lansing, MI 48824, USA
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Abstract

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A significant fraction (~ 30%) of the gamma-ray sources detected by the Fermi Gamma-ray Space Telescope is still of unknown origin, being not yet associated with counterparts at lower energies. Many unidentified gamma-ray sources (UGSs) could be blazars, the largest identified population of extragalactic gamma-ray sources and the rarest class of active galactic nuclei. In particular, it has been found that blazars occupy a defined region in WISE three dimensional color space, well separated from that occupied by other sources in which thermal emission prevails. For farther sources with weaker IR emission, additional informations can be obtained combining WISE data with X-ray or radio emission. Alternatively, the low-frequency radio emission can be used for identifying potential gamma-ray candidate blazars. However, optical spectroscopic observations represent the tell-tale tool to confirm the exact nature of these sources. To this end, an extensive observational campaign has been performed with several optical telescopes, aimed at pinpointing the exact nature of gamma-ray candidate blazars selected with the different selection methods mentioned above. The results of this campaign lead to the discovery of 60 new gamma-ray blazars, thus confirming the effectiveness of these selection criteria.

Keywords

galaxies: activeBL Lacertae objects: generalgalaxies: jetsradio continuum: galaxiesinfrared: galaxiesX-rays: galaxiesgamma rays: observations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S313: Extragalactic jets from every angle , September 2014 , pp. 58 - 63
Copyright
Copyright © International Astronomical Union 2015 

References

Ackermann, M., et al., 2011, ApJ, 743, 171Google Scholar
Aharonian, F., et al., 2009, A&A, 502, 749Google Scholar
Berlin, A. & Hooper, D. 2014, Phys. Rev. D., 89, 016014Google Scholar
Blandford, R. D. & Rees, M. J., 1978, Proc. “Pittsburgh Conference on BL Lac objects,” 328Google Scholar
Cowperthwaite, P. S., Massaro, F., D'Abrusco, R., et al. 2013, AJ, 146, 110Google Scholar
D'Abrusco, R., Longo, G., & Walton, N. A., 2009, MNRAS, 396, 223Google Scholar
D'Abrusco, R., Massaro, F., Ajello, M., Grindlay, J. E., Smith, H. A., Tosti, G., 2012, ApJ, 748, 68Google Scholar
D'Abrusco, R., Massaro, F., Paggi, A., et al., 2013, ApJS, 206, 12Google Scholar
Dermer, C. D. & Schlickeiser, R., 1993, ApJ, 416, 458Google Scholar
Dermer, C. D., Finke, J. D., Krug, H., & Böttcher, M., 2009, ApJ, 692, 32Google Scholar
Giommi, P., Padovani, P., & Polenta, G., 2013, MNRAS, 431, 1914Google Scholar
Inoue, S. & Takahara, F., 1996, ApJ, 463, 555Google Scholar
Landoni, M., Falomo, R., Treves, A., et al. 2012, A&A, 543, A116Google Scholar
Landoni, M., Falomo, R., Treves, A., et al. 2013, AJ, 145, 114Google Scholar
Landoni, M., Massaro, F., Paggi, A., et al. 2014, AJ, submittedGoogle Scholar
Laurent-Muehleisen, S. A., Kollgaard, R. I., Feigelson, E. D., et al. 1999, ApJ, 525, 127Google Scholar
Laurino, O., D'Abrusco, R., Longo, G., & Riccio, G., 2011, MNRAS, 418, 2165Google Scholar
Londish, D., Heidt, J., Boyle, B. J., et al. 2004, MNRAS, 352, 903Google Scholar
Masetti, N., Sbarufatti, B., Parisi, P. 2013 A&A, 559, A58Google Scholar
Massaro, E., Giommi, P., Leto, C., et al. 2013, VizieR Online Data Catalog, 349, 50691Google Scholar
Massaro, F., D'Abrusco, R., & Ajello, M., Grindlay, J. E., Smith, H. A., 2011, ApJ, 740, L48Google Scholar
Massaro, F., D'Abrusco, R., Paggi, A., et al., 2013a, ApJS, 206, 13Google Scholar
Massaro, F., D'Abrusco, R., Paggi, A., et al. 2013b, ApJS, 209, 10Google Scholar
Massaro, F., D'Abrusco, R., Giroletti, M., et al. 2013c, ApJS, 207, 4Google Scholar
Massaro, F., Landoni, M., D'Abrusco, R., et al. 2014, AJ, submittedGoogle Scholar
Nolan, P. L., et al., 2012, ApJS, 199, 31Google Scholar
Paggi, A., Massaro, F., D'Abrusco, R., et al. 2013, ApJS, 209, 9CrossRefGoogle Scholar
Paggi, A., Milisavljevic, D., Masetti, N., et al. 2014, AJ, 147, 112Google Scholar
Ricci, F., Massaro, F., Landoni, N., et al. 2014, in preparationGoogle Scholar
Richards, G. T., et al., 2004, ApJS, 155, 257Google Scholar
Sbarufatti, B., Treves, A., Falomo, R., et al. 2006, AJ, 132, 1Google Scholar
Sbarufatti, B., Ciprini, S., Kotilainen, J., et al. 2009, AJ, 137, 337Google Scholar
Shaw, M. S., et al., 2013a, ApJ, 764, 135CrossRefGoogle Scholar
Shaw, M. S., Filippenko, A. V., Romani, R. W.et al. 2013b AJ, 146, 127Google Scholar
Shemmer, O., et al., 2006, ApJ, 644, 86Google Scholar
Shemmer, O., Brandt, W. N., Anderson, S. F., et al., 2009, ApJ, 696, 580Google Scholar
Stern, D. & Assef, R. J. 2013 ApJ, 764, L30Google Scholar
Stickel, M., Padovani, P., Urry, C. M., Fried, J. W., & Kuehr, H., 1991, ApJ, 374, 431Google Scholar
Stocke, J. T. & Rector, T. A., 1997, ApJ, 489, L17Google Scholar
Urry, C. M. & Padovani, P., 1995, PASP, 107, 803CrossRefGoogle Scholar