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Title: The Spectral Energy Distribution of Fermi bright blazars

Abstract

We have conducted a detailed investigation of the broadband spectral properties of the γ-ray selected blazars of the Fermi LAT Bright AGN Sample (LBAS). By combining our accurately estimated Fermi γ-ray spectra with Swift, radio, infra-red, optical, and other hard X-ray/γ-ray data, collected within 3 months of the LBAS data taking period, we were able to assemble high-quality and quasi-simultaneous spectral energy distributions (SED) for 48 LBAS blazars. The SED of these γ-ray sources is similar to that of blazars discovered at other wavelengths, clearly showing, in the usual log ν-log ν F ν representation, the typical broadband spectral signatures normally attributed to a combination of low-energy synchrotron radiation followed by inverse Compton emission of one or more components. Here, we have used these SED to characterize the peak intensity of both the low- and the high-energy components. The results have been used to derive empirical relationships that estimate the position of the two peaks from the broadband colors (i.e., the radio to optical, αro, and optical to X-ray, αox, spectral slopes) and from the γ-ray spectral index. Our data show that the synchrotron peak frequency (ν S peak) is positioned between 1012.5 and 1014.5 Hz in broad-lined flat spectrummore » radio quasars (FSRQs) and between 1013 and 1017 Hz in featureless BL Lacertae objects. We find that the γ-ray spectral slope is strongly correlated with the synchrotron peak energy and with the X-ray spectral index, as expected at first order in synchrotron-inverse Compton scenarios. However, simple homogeneous, one-zone, synchrotron self-Compton (SSC) models cannot explain most of our SED, especially in the case of FSRQs and low energy peaked (LBL) BL Lacs. More complex models involving external Compton radiation or multiple SSC components are required to reproduce the overall SED and the observed spectral variability. While more than 50% of known radio bright high energy peaked (HBL) BL Lacs are detected in the LBAS sample, only less than 13% of known bright FSRQs and LBL BL Lacs are included. This suggests that the latter sources, as a class, may be much fainter γ-ray emitters than LBAS blazars, and could in fact radiate close to the expectations of simple SSC models. We categorized all our sources according to a new physical classification scheme based on the generally accepted paradigm for Active Galactic Nuclei and on the results of this SED study. Since the LAT detector is more sensitive to flat spectrum γ-ray sources, the correlation between ν S peak and γ-ray spectral index strongly favors the detection of high energy peaked blazars, thus explaining the Fermi overabundance of this type of sources compared to radio and EGRET samples. Finally, this selection effect is similar to that experienced in the soft X-ray band where HBL BL Lacs are the dominant type of blazars.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE; National Aeronautics and Space Administration (NASA)
Contributing Org.:
The Fermi-LAT Collaboration
OSTI Identifier:
1357557
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal
Additional Journal Information:
Journal Volume: 716; Journal Issue: 1; Journal ID: ISSN 0004-637X
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; BL Lacertae objects: general; galaxies: active; gamma rays: galaxies; quasars: general; radiation mechanisms: non-thermal

Citation Formats

Abdo, A. A., Ackermann, M., Agudo, I., Ajello, M., Aller, H. D., Aller, M. F., Angelakis, E., Arkharov, A. A., Axelsson, M., Bach, U., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Baughman, B. M., Bechtol, K., Bellazzini, R., Benitez, E., Berdyugin, A., Berenji, B., Blandford, R. D., Bloom, E. D., Boettcher, M., Bonamente, E., Borgland, A. W., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Burnett, T. H., Burrows, D., Buson, S., Caliandro, G. A., Calzoletti, L., Cameron, R. A., Capalbi, M., Caraveo, P. A., Carosati, D., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Çelik, Ö., Charles, E., Chaty, S., Chekhtman, A., Chen, W. P., Chiang, J., Chincarini, G., Ciprini, S., Claus, R., Cohen-Tanugi, J., Colafrancesco, S., Cominsky, L. R., Conrad, J., Costamante, L., Cutini, S., D'ammando, F., Deitrick, R., D'Elia, V., Dermer, C. D., de Angelis, A., de Palma, F., Digel, S. W., Donnarumma, I., Silva, E. do Couto e., Drell, P. S., Dubois, R., Dultzin, D., Dumora, D., Falcone, A., Farnier, C., Favuzzi, C., Fegan, S. J., Focke, W. B., Forné, E., Fortin, P., Frailis, M., Fuhrmann, L., Fukazawa, Y., Funk, S., Fusco, P., Gómez, J. L., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giommi, P., Giordano, F., Giuliani, A., Glanzman, T., Godfrey, G., Grenier, I. A., Gronwall, C., Grove, J. E., Guillemot, L., Guiriec, S., Gurwell, M. A., Hadasch, D., Hanabata, Y., Harding, A. K., Hayashida, M., Hays, E., Healey, S. E., Heidt, J., Hiriart, D., Horan, D., Hoversten, E. A., Hughes, R. E., Itoh, R., Jackson, M. S., Jóhannesson, G., Johnson, A. S., Johnson, W. N., Jorstad, S. G., Kadler, M., Kamae, T., Katagiri, H., Kataoka, J., Kawai, N., Kennea, J., Kerr, M., Kimeridze, G., Knödlseder, J., Kocian, M. L., Kopatskaya, E. N., Koptelova, E., Konstantinova, T. S., Kovalev, Y. Y., Kovalev, Yu. A., Kurtanidze, O. M., Kuss, M., Lande, J., Larionov, V. M., Latronico, L., Leto, P., Lindfors, E., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Makeev, A., Marchegiani, P., Marscher, A. P., Marshall, F., Max-Moerbeck, W., Mazziotta, M. N., McConville, W., McEnery, J. E., Meurer, C., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nestoras, I., Nilsson, K., Nizhelsky, N. A., Nolan, P. L., Norris, J. P., Nuss, E., Ohsugi, T., Ojha, R., Omodei, N., Orlando, E., Ormes, J. F., Osborne, J., Ozaki, M., Pacciani, L., Padovani, P., Pagani, C., Page, K., Paneque, D., Panetta, J. H., Parent, D., Pasanen, M., Pavlidou, V., Pelassa, V., Pepe, M., Perri, M., Pesce-Rollins, M., Piranomonte, S., Piron, F., Pittori, C., Porter, T. A., Puccetti, S., Rahoui, F., Rainò, S., Raiteri, C., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reposeur, T., Richards, J. L., Ritz, S., Rochester, L. S., Rodriguez, A. Y., Romani, R. W., Ros, J. A., Roth, M., Roustazadeh, P., Ryde, F., Sadrozinski, H. F. -W., Sadun, A., Sanchez, D., Sander, A., Parkinson, P. M. Saz, Scargle, J. D., Sellerholm, A., Sgrò, C., Shaw, M. S., Sigua, L. A., Siskind, E. J., Smith, D. A., Smith, P. D., Spandre, G., Spinelli, P., Starck, J. -L., Stevenson, M., Stratta, G., Strickman, M. S., Suson, D. J., Tajima, H., Takahashi, H., Takahashi, T., Takalo, L. O., Tanaka, T., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Torres, D. F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vasileiou, V., Verrecchia, F., Vilchez, N., Villata, M., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Ylinen, T., Zensus, J. A., Zhekanis, G. V., and Ziegler, M. The Spectral Energy Distribution of Fermi bright blazars. United States: N. p., 2010. Web. doi:10.1088/0004-637X/716/1/30.
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Abdo, A. A., Ackermann, M., Agudo, I., Ajello, M., Aller, H. D., Aller, M. F., Angelakis, E., Arkharov, A. A., Axelsson, M., Bach, U., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Baughman, B. M., Bechtol, K., Bellazzini, R., Benitez, E., Berdyugin, A., Berenji, B., Blandford, R. D., Bloom, E. D., Boettcher, M., Bonamente, E., Borgland, A. W., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Burnett, T. H., Burrows, D., Buson, S., Caliandro, G. A., Calzoletti, L., Cameron, R. A., Capalbi, M., Caraveo, P. A., Carosati, D., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Çelik, Ö., Charles, E., Chaty, S., Chekhtman, A., Chen, W. P., Chiang, J., Chincarini, G., Ciprini, S., Claus, R., Cohen-Tanugi, J., Colafrancesco, S., Cominsky, L. R., Conrad, J., Costamante, L., Cutini, S., D'ammando, F., Deitrick, R., D'Elia, V., Dermer, C. D., de Angelis, A., de Palma, F., Digel, S. W., Donnarumma, I., Silva, E. do Couto e., Drell, P. S., Dubois, R., Dultzin, D., Dumora, D., Falcone, A., Farnier, C., Favuzzi, C., Fegan, S. J., Focke, W. B., Forné, E., Fortin, P., Frailis, M., Fuhrmann, L., Fukazawa, Y., Funk, S., Fusco, P., Gómez, J. L., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giommi, P., Giordano, F., Giuliani, A., Glanzman, T., Godfrey, G., Grenier, I. A., Gronwall, C., Grove, J. E., Guillemot, L., Guiriec, S., Gurwell, M. A., Hadasch, D., Hanabata, Y., Harding, A. K., Hayashida, M., Hays, E., Healey, S. E., Heidt, J., Hiriart, D., Horan, D., Hoversten, E. A., Hughes, R. E., Itoh, R., Jackson, M. S., Jóhannesson, G., Johnson, A. S., Johnson, W. N., Jorstad, S. G., Kadler, M., Kamae, T., Katagiri, H., Kataoka, J., Kawai, N., Kennea, J., Kerr, M., Kimeridze, G., Knödlseder, J., Kocian, M. L., Kopatskaya, E. N., Koptelova, E., Konstantinova, T. S., Kovalev, Y. Y., Kovalev, Yu. A., Kurtanidze, O. M., Kuss, M., Lande, J., Larionov, V. M., Latronico, L., Leto, P., Lindfors, E., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Makeev, A., Marchegiani, P., Marscher, A. P., Marshall, F., Max-Moerbeck, W., Mazziotta, M. N., McConville, W., McEnery, J. E., Meurer, C., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nestoras, I., Nilsson, K., Nizhelsky, N. A., Nolan, P. L., Norris, J. P., Nuss, E., Ohsugi, T., Ojha, R., Omodei, N., Orlando, E., Ormes, J. F., Osborne, J., Ozaki, M., Pacciani, L., Padovani, P., Pagani, C., Page, K., Paneque, D., Panetta, J. H., Parent, D., Pasanen, M., Pavlidou, V., Pelassa, V., Pepe, M., Perri, M., Pesce-Rollins, M., Piranomonte, S., Piron, F., Pittori, C., Porter, T. A., Puccetti, S., Rahoui, F., Rainò, S., Raiteri, C., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reposeur, T., Richards, J. L., Ritz, S., Rochester, L. S., Rodriguez, A. Y., Romani, R. W., Ros, J. A., Roth, M., Roustazadeh, P., Ryde, F., Sadrozinski, H. F. -W., Sadun, A., Sanchez, D., Sander, A., Parkinson, P. M. Saz, Scargle, J. D., Sellerholm, A., Sgrò, C., Shaw, M. S., Sigua, L. A., Siskind, E. J., Smith, D. A., Smith, P. D., Spandre, G., Spinelli, P., Starck, J. -L., Stevenson, M., Stratta, G., Strickman, M. S., Suson, D. J., Tajima, H., Takahashi, H., Takahashi, T., Takalo, L. O., Tanaka, T., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Torres, D. F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vasileiou, V., Verrecchia, F., Vilchez, N., Villata, M., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Ylinen, T., Zensus, J. A., Zhekanis, G. V., & Ziegler, M. The Spectral Energy Distribution of Fermi bright blazars. United States. https://doi.org/10.1088/0004-637X/716/1/30
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Abdo, A. A., Ackermann, M., Agudo, I., Ajello, M., Aller, H. D., Aller, M. F., Angelakis, E., Arkharov, A. A., Axelsson, M., Bach, U., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Baughman, B. M., Bechtol, K., Bellazzini, R., Benitez, E., Berdyugin, A., Berenji, B., Blandford, R. D., Bloom, E. D., Boettcher, M., Bonamente, E., Borgland, A. W., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Burnett, T. H., Burrows, D., Buson, S., Caliandro, G. A., Calzoletti, L., Cameron, R. A., Capalbi, M., Caraveo, P. A., Carosati, D., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Çelik, Ö., Charles, E., Chaty, S., Chekhtman, A., Chen, W. P., Chiang, J., Chincarini, G., Ciprini, S., Claus, R., Cohen-Tanugi, J., Colafrancesco, S., Cominsky, L. R., Conrad, J., Costamante, L., Cutini, S., D'ammando, F., Deitrick, R., D'Elia, V., Dermer, C. D., de Angelis, A., de Palma, F., Digel, S. W., Donnarumma, I., Silva, E. do Couto e., Drell, P. S., Dubois, R., Dultzin, D., Dumora, D., Falcone, A., Farnier, C., Favuzzi, C., Fegan, S. J., Focke, W. B., Forné, E., Fortin, P., Frailis, M., Fuhrmann, L., Fukazawa, Y., Funk, S., Fusco, P., Gómez, J. L., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giommi, P., Giordano, F., Giuliani, A., Glanzman, T., Godfrey, G., Grenier, I. A., Gronwall, C., Grove, J. E., Guillemot, L., Guiriec, S., Gurwell, M. A., Hadasch, D., Hanabata, Y., Harding, A. K., Hayashida, M., Hays, E., Healey, S. E., Heidt, J., Hiriart, D., Horan, D., Hoversten, E. A., Hughes, R. E., Itoh, R., Jackson, M. S., Jóhannesson, G., Johnson, A. S., Johnson, W. N., Jorstad, S. G., Kadler, M., Kamae, T., Katagiri, H., Kataoka, J., Kawai, N., Kennea, J., Kerr, M., Kimeridze, G., Knödlseder, J., Kocian, M. L., Kopatskaya, E. N., Koptelova, E., Konstantinova, T. S., Kovalev, Y. Y., Kovalev, Yu. A., Kurtanidze, O. M., Kuss, M., Lande, J., Larionov, V. M., Latronico, L., Leto, P., Lindfors, E., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Makeev, A., Marchegiani, P., Marscher, A. P., Marshall, F., Max-Moerbeck, W., Mazziotta, M. N., McConville, W., McEnery, J. E., Meurer, C., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nestoras, I., Nilsson, K., Nizhelsky, N. A., Nolan, P. L., Norris, J. P., Nuss, E., Ohsugi, T., Ojha, R., Omodei, N., Orlando, E., Ormes, J. F., Osborne, J., Ozaki, M., Pacciani, L., Padovani, P., Pagani, C., Page, K., Paneque, D., Panetta, J. H., Parent, D., Pasanen, M., Pavlidou, V., Pelassa, V., Pepe, M., Perri, M., Pesce-Rollins, M., Piranomonte, S., Piron, F., Pittori, C., Porter, T. A., Puccetti, S., Rahoui, F., Rainò, S., Raiteri, C., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reposeur, T., Richards, J. L., Ritz, S., Rochester, L. S., Rodriguez, A. Y., Romani, R. W., Ros, J. A., Roth, M., Roustazadeh, P., Ryde, F., Sadrozinski, H. F. -W., Sadun, A., Sanchez, D., Sander, A., Parkinson, P. M. Saz, Scargle, J. D., Sellerholm, A., Sgrò, C., Shaw, M. S., Sigua, L. A., Siskind, E. J., Smith, D. A., Smith, P. D., Spandre, G., Spinelli, P., Starck, J. -L., Stevenson, M., Stratta, G., Strickman, M. S., Suson, D. J., Tajima, H., Takahashi, H., Takahashi, T., Takalo, L. O., Tanaka, T., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Torres, D. F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vasileiou, V., Verrecchia, F., Vilchez, N., Villata, M., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Ylinen, T., Zensus, J. A., Zhekanis, G. V., and Ziegler, M. Thu . "The Spectral Energy Distribution of Fermi bright blazars". United States. https://doi.org/10.1088/0004-637X/716/1/30. https://www.osti.gov/servlets/purl/1357557.
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@article{osti_1357557,
title = {The Spectral Energy Distribution of Fermi bright blazars},
author = {Abdo, A. A. and Ackermann, M. and Agudo, I. and Ajello, M. and Aller, H. D. and Aller, M. F. and Angelakis, E. and Arkharov, A. A. and Axelsson, M. and Bach, U. and Baldini, L. and Ballet, J. and Barbiellini, G. and Bastieri, D. and Baughman, B. M. and Bechtol, K. and Bellazzini, R. and Benitez, E. and Berdyugin, A. and Berenji, B. and Blandford, R. D. and Bloom, E. D. and Boettcher, M. and Bonamente, E. and Borgland, A. W. and Bregeon, J. and Brez, A. and Brigida, M. and Bruel, P. and Burnett, T. H. and Burrows, D. and Buson, S. and Caliandro, G. A. and Calzoletti, L. and Cameron, R. A. and Capalbi, M. and Caraveo, P. A. and Carosati, D. and Casandjian, J. M. and Cavazzuti, E. and Cecchi, C. and Çelik, Ö. and Charles, E. and Chaty, S. and Chekhtman, A. and Chen, W. P. and Chiang, J. and Chincarini, G. and Ciprini, S. and Claus, R. and Cohen-Tanugi, J. and Colafrancesco, S. and Cominsky, L. R. and Conrad, J. and Costamante, L. and Cutini, S. and D'ammando, F. and Deitrick, R. and D'Elia, V. and Dermer, C. D. and de Angelis, A. and de Palma, F. and Digel, S. W. and Donnarumma, I. and Silva, E. do Couto e. and Drell, P. S. and Dubois, R. and Dultzin, D. and Dumora, D. and Falcone, A. and Farnier, C. and Favuzzi, C. and Fegan, S. J. and Focke, W. B. and Forné, E. and Fortin, P. and Frailis, M. and Fuhrmann, L. and Fukazawa, Y. and Funk, S. and Fusco, P. and Gómez, J. L. and Gargano, F. and Gasparrini, D. and Gehrels, N. and Germani, S. and Giebels, B. and Giglietto, N. and Giommi, P. and Giordano, F. and Giuliani, A. and Glanzman, T. and Godfrey, G. and Grenier, I. A. and Gronwall, C. and Grove, J. E. and Guillemot, L. and Guiriec, S. and Gurwell, M. A. and Hadasch, D. and Hanabata, Y. and Harding, A. K. and Hayashida, M. and Hays, E. and Healey, S. E. and Heidt, J. and Hiriart, D. and Horan, D. and Hoversten, E. A. and Hughes, R. E. and Itoh, R. and Jackson, M. S. and Jóhannesson, G. and Johnson, A. S. and Johnson, W. N. and Jorstad, S. G. and Kadler, M. and Kamae, T. and Katagiri, H. and Kataoka, J. and Kawai, N. and Kennea, J. and Kerr, M. and Kimeridze, G. and Knödlseder, J. and Kocian, M. L. and Kopatskaya, E. N. and Koptelova, E. and Konstantinova, T. S. and Kovalev, Y. Y. and Kovalev, Yu. A. and Kurtanidze, O. M. and Kuss, M. and Lande, J. and Larionov, V. M. and Latronico, L. and Leto, P. and Lindfors, E. and Longo, F. and Loparco, F. and Lott, B. and Lovellette, M. N. and Lubrano, P. and Madejski, G. M. and Makeev, A. and Marchegiani, P. and Marscher, A. P. and Marshall, F. and Max-Moerbeck, W. and Mazziotta, M. N. and McConville, W. and McEnery, J. E. and Meurer, C. and Michelson, P. F. and Mitthumsiri, W. and Mizuno, T. and Moiseev, A. A. and Monte, C. and Monzani, M. E. and Morselli, A. and Moskalenko, I. V. and Murgia, S. and Nestoras, I. and Nilsson, K. and Nizhelsky, N. A. and Nolan, P. L. and Norris, J. P. and Nuss, E. and Ohsugi, T. and Ojha, R. and Omodei, N. and Orlando, E. and Ormes, J. F. and Osborne, J. and Ozaki, M. and Pacciani, L. and Padovani, P. and Pagani, C. and Page, K. and Paneque, D. and Panetta, J. H. and Parent, D. and Pasanen, M. and Pavlidou, V. and Pelassa, V. and Pepe, M. and Perri, M. and Pesce-Rollins, M. and Piranomonte, S. and Piron, F. and Pittori, C. and Porter, T. A. and Puccetti, S. and Rahoui, F. and Rainò, S. and Raiteri, C. and Rando, R. and Razzano, M. and Reimer, A. and Reimer, O. and Reposeur, T. and Richards, J. L. and Ritz, S. and Rochester, L. S. and Rodriguez, A. Y. and Romani, R. W. and Ros, J. A. and Roth, M. and Roustazadeh, P. and Ryde, F. and Sadrozinski, H. F. -W. and Sadun, A. and Sanchez, D. and Sander, A. and Parkinson, P. M. Saz and Scargle, J. D. and Sellerholm, A. and Sgrò, C. and Shaw, M. S. and Sigua, L. A. and Siskind, E. J. and Smith, D. A. and Smith, P. D. and Spandre, G. and Spinelli, P. and Starck, J. -L. and Stevenson, M. and Stratta, G. and Strickman, M. S. and Suson, D. J. and Tajima, H. and Takahashi, H. and Takahashi, T. and Takalo, L. O. and Tanaka, T. and Thayer, J. B. and Thayer, J. G. and Thompson, D. J. and Tibaldo, L. and Torres, D. F. and Tosti, G. and Tramacere, A. and Uchiyama, Y. and Usher, T. L. and Vasileiou, V. and Verrecchia, F. and Vilchez, N. and Villata, M. and Vitale, V. and Waite, A. P. and Wang, P. and Winer, B. L. and Wood, K. S. and Ylinen, T. and Zensus, J. A. and Zhekanis, G. V. and Ziegler, M.},
abstractNote = {We have conducted a detailed investigation of the broadband spectral properties of the γ-ray selected blazars of the Fermi LAT Bright AGN Sample (LBAS). By combining our accurately estimated Fermi γ-ray spectra with Swift, radio, infra-red, optical, and other hard X-ray/γ-ray data, collected within 3 months of the LBAS data taking period, we were able to assemble high-quality and quasi-simultaneous spectral energy distributions (SED) for 48 LBAS blazars. The SED of these γ-ray sources is similar to that of blazars discovered at other wavelengths, clearly showing, in the usual log ν-log ν F ν representation, the typical broadband spectral signatures normally attributed to a combination of low-energy synchrotron radiation followed by inverse Compton emission of one or more components. Here, we have used these SED to characterize the peak intensity of both the low- and the high-energy components. The results have been used to derive empirical relationships that estimate the position of the two peaks from the broadband colors (i.e., the radio to optical, αro, and optical to X-ray, αox, spectral slopes) and from the γ-ray spectral index. Our data show that the synchrotron peak frequency (ν S peak) is positioned between 1012.5 and 1014.5 Hz in broad-lined flat spectrum radio quasars (FSRQs) and between 1013 and 1017 Hz in featureless BL Lacertae objects. We find that the γ-ray spectral slope is strongly correlated with the synchrotron peak energy and with the X-ray spectral index, as expected at first order in synchrotron-inverse Compton scenarios. However, simple homogeneous, one-zone, synchrotron self-Compton (SSC) models cannot explain most of our SED, especially in the case of FSRQs and low energy peaked (LBL) BL Lacs. More complex models involving external Compton radiation or multiple SSC components are required to reproduce the overall SED and the observed spectral variability. While more than 50% of known radio bright high energy peaked (HBL) BL Lacs are detected in the LBAS sample, only less than 13% of known bright FSRQs and LBL BL Lacs are included. This suggests that the latter sources, as a class, may be much fainter γ-ray emitters than LBAS blazars, and could in fact radiate close to the expectations of simple SSC models. We categorized all our sources according to a new physical classification scheme based on the generally accepted paradigm for Active Galactic Nuclei and on the results of this SED study. Since the LAT detector is more sensitive to flat spectrum γ-ray sources, the correlation between ν S peak and γ-ray spectral index strongly favors the detection of high energy peaked blazars, thus explaining the Fermi overabundance of this type of sources compared to radio and EGRET samples. Finally, this selection effect is similar to that experienced in the soft X-ray band where HBL BL Lacs are the dominant type of blazars.},
doi = {10.1088/0004-637X/716/1/30},
journal = {The Astrophysical Journal},
number = 1,
volume = 716,
place = {United States},
year = {2010},
month = {5}
}
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    What powers the radio-loud narrow-line Seyfert 1 galaxy RX J2314.9+2243?: A view onto its central engine from radio to X-rays⋆
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    Insights into the emission of the blazar 1ES 1011+496 through unprecedented broadband observations during 2011 and 2012
    journal, June 2016

    Multiband variability studies and novel broadband SED modeling of Mrk 501 in 2009
    journal, July 2017

    A fast, very-high-energy γ -ray flare from BL Lacertae during a period of multi-wavelength activity in June 2015
    journal, March 2019

    F-GAMMA: Multi-frequency radio monitoring of Fermi blazars : The 2.64 to 43 GHz Effelsberg light curves from 2007–2015⋆
    journal, June 2019

    Optical characterization of WISE selected blazar candidates
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    • de Menezes, Raniere; Peña-Herazo, Harold A.; Marchesini, Ezequiel J.
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    Catalog and Statistical Study of X-Ray Selected bl Lacertae Objects
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    INSIGHTS INTO THE HIGH-ENERGY γ-RAY EMISSION OF MARKARIAN 501 FROM EXTENSIVE MULTIFREQUENCY OBSERVATIONS IN THE FERMI ERA
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    Emission from hot dust in the Infrared Spectra of Gamma-Ray Bright Blazars
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    • Malmrose, Michael P.; Marscher, Alan P.; Jorstad, Svetlana G.
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    Strong new Constraints on the Extragalactic Background Light in the Near- to Mid-Infrared
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    From the Blazar Sequence to the Blazar Envelope: Revisiting the Relativistic jet Dichotomy in Radio-Loud Active Galactic Nuclei
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    THE SECOND CATALOG OF ACTIVE GALACTIC NUCLEI DETECTED BY THE FERMI LARGE AREA TELESCOPE
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    Infrared Colors of the Gamma-Ray-Detected Blazars
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    THE SPECTRAL INDEX PROPERTIES OF FERMI BLAZARS
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    LEPTONIC AND HADRONIC MODELING OF FERMI -DETECTED BLAZARS
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    MULTIWAVELENGTH VARIABILITY PROPERTIES OF FERMI BLAZAR S5 0716+714
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    Rotation of the Optical Polarization Angle Associated with the 2008 γ-Ray Flare of Blazar w Comae
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    THE WISE BLAZAR-LIKE RADIO-LOUD SOURCES: AN ALL-SKY CATALOG OF CANDIDATE γ-RAY BLAZARS
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    • D'Abrusco, R.; Massaro, F.; Paggi, A.
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    Study on Variability and Spectral Properties of Blazar 3C 273 with Long-term Multi-band Optical Monitoring from 2006 to 2015
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    Model simulation for periodic double-peaked outbursts in blazar OJ 287: binary black hole plus lighthouse effect
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    Evidence for Gamma-Ray Halos Around Active Galactic Nuclei and the First Measurement of Intergalactic Magnetic Fields
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    On the Location of the γ-Ray Outburst Emission in the bl Lacertae Object ao 0235+164 Through Observations Across the Electromagnetic Spectrum
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    WHY HAVE MANY OF THE BRIGHTEST RADIO-LOUD BLAZARS NOT BEEN DETECTED IN GAMMA-RAYS BY FERMI ?
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    A simplified view of blazars: the γ-ray case
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    High energy emission processes in OJ 287 during 2009 flare
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    Are both BL Lacs and pulsar wind nebulae the astrophysical counterparts of IceCube neutrino events?
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    A hadronic origin for ultra-high-frequency-peaked BL Lac objects
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    From the ‘blazar sequence' to unification of blazars and radio galaxies
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    High-energy neutrino flux from individual blazar flares
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    Te-REX: a sample of extragalactic TeV-emitting candidates
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    The radio-γ-ray connection in Fermi blazars: γ-ray-radio flux correlation in blazars
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    The transition between BL Lac objects and flat spectrum radio quasars: FSRQs and BL Lacs
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    H.E.S.S. Monitoring of PKS 2155-304 in 2015 and 2016
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    • Galaxies, Vol. 7, Issue 1
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    A COMPREHENSIVE STATISTICAL DESCRIPTION OF RADIO-THROUGH- γ -RAY SPECTRAL ENERGY DISTRIBUTIONS OF ALL KNOWN BLAZARS
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    Multicolor Optical Monitoring of the BL Lacertae Object S5 0716+714 during the 2012 Outburst
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    Spectroscopic Redshift of the Gamma-Ray Blazar B2 1215+30 from Ly α Emission
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    Search for Intra-day Optical Variability in Mrk 501
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    Bow Ties in the Sky. II. Searching for Gamma-Ray Halos in the Fermi Sky Using Anisotropy
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    Scaling of Relativistic Shear Flows with the Bulk Lorentz Factor
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    Leptonic and Hadronic Modeling of Fermi -LAT Hard Spectrum Quasars and Predictions for High-energy Polarization
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    The Polarization Behavior of Relativistic Synchrotron Jets
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    The Radio/Gamma Connection of Blazars from High to Low Radio Frequencies
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    Identifying the 3FHL Catalog. I. Archival Swift Observations and Source Classification
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    Evaluating the Optical Classification of Fermi BCUs Using Machine Learning
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    Signature of Stochastic Acceleration and Cooling Processes in an Outburst Phase of the TeV Blazar ON 231
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    X-Ray Spectral Variations of Synchrotron Peak in BL Lacs
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    A Two-zone Model for Blazar Emission: Implications for TXS 0506+056 and the Neutrino Event IceCube-170922A
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    Strong Soft X-Ray Excess in 2015 XMM-Newton Observations of BL Lac OJ 287
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    NuSTAR Perspective on High-redshift MeV Blazars
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    On the Jet Properties of γ -Ray-loud Active Galactic Nuclei
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    Two New Catalogs of Blazar Candidates in the WISE Infrared Sky
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    • D’Abrusco, Raffaele; Álvarez Crespo, Nuria; Massaro, Francesco
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    New Hard-TeV Extreme Blazars Detected with the MAGIC Telescopes
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    Fermi -LAT Stacking Analysis Technique: An Application to Extreme Blazars and Prospects for their CTA Detection
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    Multi-TeV Flaring from High-energy Blazars: An Evidence of the Photohadronic Process
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    Luminosity–redshift (L−z) relation and the blazar sequence for low power blazars
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    Ratio of the Core to the Extended Emissions in the Comoving Frame for Blazars
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    • Journal of Astrophysics and Astronomy, Vol. 38, Issue 2
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    Correlation between Fermi /LAT gamma-ray and 37 GHz radio properties of northern AGN averaged over 11 months
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    Near-infrared and gamma-ray monitoring of TANAMI gamma-ray bright sources
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    Searching for γ -ray signature in WHSP blazars
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    2WHSP: A multi-frequency selected catalogue of high energy and very high energy γ -ray blazars and blazar candidates
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    Long-term optical monitoring of TeV emitting blazars: I. Data analysis⋆
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    THE RADIO/GAMMA-RAY CONNECTION IN ACTIVE GALACTIC NUCLEI IN THE ERA OF THE FERMI LARGE AREA TELESCOPE
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    γ-Ray and Parsec-Scale jet Properties of a Complete Sample of Blazars from the Mojave Program
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    GAMMA-RAY LOUDNESS, SYNCHROTRON PEAK FREQUENCY, AND PARSEC-SCALE PROPERTIES OF BLAZARS DETECTED BY THE FERMI LARGE AREA TELESCOPE
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    Seed Photon Fields of Blazars in the Internal Shock Scenario
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    IMPLICATIONS OF PLASMA BEAM INSTABILITIES FOR THE STATISTICS OF THE FERMI HARD GAMMA-RAY BLAZARS AND THE ORIGIN OF THE EXTRAGALACTIC GAMMA-RAY BACKGROUND
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    • Broderick, Avery E.; Pfrommer, Christoph; Puchwein, Ewald
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    SEARCHING FOR NEW γ-RAY BLAZAR CANDIDATES IN THE THIRD PALERMO BAT HARD X-RAY CATALOG WITH WISE
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    • Maselli, A.; Massaro, F.; Cusumano, G.
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    LOCATION OF γ-RAY FLARE EMISSION IN THE JET OF THE BL LACERTAE OBJECT OJ287 MORE THAN 14 pc FROM THE CENTRAL ENGINE
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    Optical observations of BL Lac object ON 231 (W Comae) during 2010 March–April
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    • Cheng, Xin-Lun; Zhang, You-Hong; Xu, Lei
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    The observed radio/gamma-ray emission correlation for blazars with the Fermi-LAT and the RATAN-600 data
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    • Mufakharov, T.; Mingaliev, M.; Sotnikova, Yu.
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    Characterizing long-term optical, ultraviolet and X-ray variability in different activity states of OJ 287
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    Statistical analysis of variability properties of the Kepler blazar W2R 1926+42
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    Extreme- and high-synchrotron-peaked blazars at the limit of Fermi-LAT detectability: the γ-ray spectrum of 1BIGB sources
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    Long-term multiwavelength view of the blazar 1ES 1218+304
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    Multiband optical flux density and polarization microvariability study of optically bright blazars
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    Temporal correlation between the optical and γ-ray flux variations in the blazar 3C 454.3
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    Measurement of the high-energy gamma-ray emission from the Moon with the Fermi Large Area Telescope
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    Discovery of very high energy γ -ray emission from the BL Lacertae object PKS 0301−243 with H.E.S.S.
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    Insights into the emission of the blazar 1ES 1011+496 through unprecedented broadband observations during 2011 and 2012
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    Fermi-LAT Stacking Analysis Technique: An Application to Extreme Blazars and Prospects for their CTA Detection
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    A two-zone model for blazar emission: implications for TXS 0506+056 and the neutrino event IceCube-170922A
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    Variability and Period Analysis for BL Lac AO 0235+164
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    Extremely Rapid X-Ray Flares of TeV Blazars in the RXTE Era
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    Probing Blazar Emission Processes with Optical/Gamma-Ray Flare Correlations
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    Comprehensive Monitoring of Gamma-Ray Bright Blazars. i. Statistical Study of Optical, X-Ray, and Gamma-Ray Spectral Slopes
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    Multi-Color Optical Monitoring of mrk 501 from 2010 to 2015
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    THE SPECTRAL ENERGY DISTRIBUTIONS OF FERMI BLAZARS
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    Leptonic and Hadronic Modeling of Fermi-Detected Blazars: Spectral Energy Distribution Modeling and High-Energy Polarization Predictions
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    NuSTAR perspective on high-redshift MeV blazars
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    Exploring the Connection between Parsec-scale Jet Activity and Broadband Outbursts in 3C 279
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    Ultrahigh-energy Cosmic-Ray Interactions as the Origin of Very High-energy γ -Rays from BL Lacertae Objects
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    The TANAMI Multiwavelength Program: Dynamic spectral energy distributions of southern blazars
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    FERMI LARGE AREA TELESCOPE OBSERVATIONS OF MARKARIAN 421: THE MISSING PIECE OF ITS SPECTRAL ENERGY DISTRIBUTION
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    • Abramowski, A.; Acero, F.; Aharonian, F.
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/desy-2014-00641

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    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/pubdb-2017-09408

    BAT AGN Spectroscopic Survey. XVI. General Physical Characteristics of BAT Blazars
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