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| Title: |
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A Statistical Approach to Recognizing Source Classes for Unassociated Sources in the First Fermi-LAT Catalog |
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| Author: |
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M. Ackermann, M. Ajello, A. Allafort, E. Antolini, L. Baldini, J. Ballet1, G. Barbiellini, D. Bastieri, R. Bellazzini, B. Berenji, R. D. Blandford, E. D. Bloom, E. Bonamente, A. W. Borgland, A. Bouvier, T. J. Brandt2, J. Bregeon, M. Brigida, P. Bruel3, R. Buehler, T. H. Burnett, S. Buson, G. A. Caliandro, R. A. Cameron, P. A. Caraveo, J. M. Casandjian1, E. Cavazzuti, C. Cecchi, Ö. Çelik, E. Charles, A. Chekhtman, A. W. Chen, C. C. Cheung, J. Chiang, S. Ciprini, R. Claus, J. Cohen-Tanugi4, J. Conrad, S. Cutini, A. De Angelis, M. E. Decesar, A. De Luca, F. De Palma, C. D. Dermer, E. Do Couto E Silva, P. S. Drell, A. Drlica-Wagner, R. Dubois, T. Enoto, C. Favuzzi, S. J. Fegan3, E. C. Ferrara, W. B. Focke, P. Fortin3, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, N. Gehrels, S. Germani, N. Giglietto, F. Giordano, M. Giroletti, T. Glanzman, G. Godfrey, I. A. Grenier1, M.-H. Grondin, J. E. Grove, L. Guillemot, S. Guiriec, M. Gustafsson, D. Hadasch, Y. Hanabata, A. K. Harding, M. Hayashida, E. Hays, S. E. Healey, A. B. Hill5, D. Horan3, X. Hou6, G. Jóhannesson, A. S. Johnson, T. J. Johnson, T. Kamae, H. Katagiri, J. Kataoka, M. Kerr, J. Knödlseder2, M. Kuss, J. Lande7, L. Latronico, S.-H. Lee, M. Lemoine-Goumard6, F. Longo, F. Loparco, B. Lott6, M. N. Lovellette, P. Lubrano, G. M. Madejski, M. N. Mazziotta, J. E. Mcenery, J. Mehault6, P. F. Michelson, R. P. Mignani, W. Mitthumsiri, T. Mizuno, M. E. Monzani, A. Morselli, I. V. Moskalenko, S. Murgia, T. Nakamori, M. Naumann-Godo8, 9, P. L. Nolan, J. P. Norris, E. Nuss4, T. Ohsugi, A. Okumura, N. Omodei, E. Orlando, J. F. Ormes, M. Ozaki, D. Paneque, J. H. Panetta, D. Parent, V. Pelassa4, M. Pesce-Rollins, M. Pierbattista1, F. Piron4, G. Pivato, T. A. Porter, S. Rainò, R. Rando, P. S. Ray, M. Razzano, A. Reimer, O. Reimer, T. Reposeur6, R. W. Romani, H. F.-W. Sadrozinski, D. Salvetti, P. M. Saz Parkinson, T. L. Schalk, C. Sgrò, M. S. Shaw, E. J. Siskind, P. D. Smith, G. Spandre, P. Spinelli, D. J. Suson, H. Takahashi, T. Tanaka, J. G. Thayer, J. B. Thayer, D. J. Thompson, L. Tibaldo, O. Tibolla, D. F. Torres, G. Tosti, A. Tramacere, E. Troja, T. L. Usher, J. Vandenbroucke, V. Vasileiou4, G. Vianello, N. Vilchez2, V. Vitale, A. P. Waite, E. Wallace, P. Wang, B. L. Winer, M. T. Wolff, D. L. Wood, K. S. Wood, Z. Yang, S. Zimmer |
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| Laboratory: |
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| Research team: |
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APC - AHE
GLAST |
| Abstract: |
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The Fermi Large Area Telescope First Source Catalog (1FGL) provided spatial, spectral, and temporal properties for a large number of gamma-ray sources using a uniform analysis method. After correlating with the most-complete catalogs of source types known to emit gamma rays, 630 of these sources are "unassociated" (i.e. have no obvious counterparts at other wavelengths). Here, we employ two statistical analyses of the primary gamma-ray characteristics for these unassociated sources in an effort to correlate their gamma-ray properties with the AGN and pulsar populations in 1FGL. Based on the correlation results, we classify 221 AGN-like and 134 pulsar-like sources in the 1FGL unassociated sources. The results of these source "classifications" appear to match the expected source distributions, especially at high Galactic latitudes. While useful for planning future multiwavelength follow-up observations, these analyses use limited inputs, and their predictions should not be considered equivalent to "probable source classes" for these sources. We discuss multiwavelength results and catalog cross-correlations to date |
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| Document of the type: |
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Article in peer-reviewed journal |
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Publication or writing
date: |
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2012 |
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| Journal: |
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| Astrophysical Journal (Astrophys. J.) |
| Publisher |
American Astronomical Society |
| ISSN |
0004-637X |
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| Volume: |
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753 |
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| Page/Article: |
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83 |
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| Keyword(s): |
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catalogs – galaxies: active – gamma rays: general – methods: statistical – pulsars: general |
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