skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

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:
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.
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. doi:10.1088/0004-637X/716/1/30.
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. doi:10.1088/0004-637X/716/1/30. https://www.osti.gov/servlets/purl/1357557.
@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 = {Astrophysical Journal},
number = 1,
volume = 716,
place = {United States},
year = {2010},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 354 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

FERMI /LARGE AREA TELESCOPE BRIGHT GAMMA-RAY SOURCE LIST
journal, June 2009

  • Abdo, A. A.; Ackermann, M.; Ajello, M.
  • The Astrophysical Journal Supplement Series, Vol. 183, Issue 1
  • DOI: 10.1088/0067-0049/183/1/46

BRIGHT ACTIVE GALACTIC NUCLEI SOURCE LIST FROM THE FIRST THREE MONTHS OF THE FERMI LARGE AREA TELESCOPE ALL-SKY SURVEY
journal, July 2009


FERMI LAT OBSERVATIONS OF LS I +61°303: FIRST DETECTION OF AN ORBITAL MODULATION IN GeV GAMMA RAYS
journal, August 2009


SPECTRAL PROPERTIES OF BRIGHT FERMI -DETECTED BLAZARS IN THE GAMMA-RAY BAND
journal, January 2010


Veritas Observations of a very high Energy γ-Ray Flare from the Blazar 3c 66a
journal, February 2009


MULTIWAVELENGTH OBSERVATIONS OF A TeV-FLARE FROM W COMAE
journal, November 2009


SIMULTANEOUS OBSERVATIONS OF PKS 2155–304 WITH HESS, FERMI , RXTE , AND ATOM: SPECTRAL ENERGY DISTRIBUTIONS AND VARIABILITY IN A LOW STATE
journal, April 2009


The Swift BAT X‐Ray Survey. III. X‐Ray Spectra and Statistical Properties
journal, January 2008

  • Ajello, M.; Rau, A.; Greiner, J.
  • The Astrophysical Journal, Vol. 673, Issue 1
  • DOI: 10.1086/524104

THE EVOLUTION OF SWIFT /BAT BLAZARS AND THE ORIGIN OF THE MeV BACKGROUND
journal, June 2009


Observation of Very High Energy Gamma‐Ray Emission from the Active Galactic Nucleus 1ES 1959+650 Using the MAGIC Telescope
journal, March 2006

  • Albert, J.; Aliu, E.; Anderhub, H.
  • The Astrophysical Journal, Vol. 639, Issue 2
  • DOI: 10.1086/499421

Variable Very High Energy γ‐Ray Emission from Markarian 501
journal, November 2007

  • Albert, J.; Aliu, E.; Anderhub, H.
  • The Astrophysical Journal, Vol. 669, Issue 2
  • DOI: 10.1086/521382

Discovery of Very High Energy γ-Ray Emission from the Low-Frequency-peaked BL Lacertae Object BL Lacertae
journal, August 2007

  • Albert, J.; Aliu, E.; Anderhub, H.
  • The Astrophysical Journal, Vol. 666, Issue 1
  • DOI: 10.1086/521550

THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION
journal, May 2009


The Burst Alert Telescope (BAT) on the SWIFT Midex Mission
journal, October 2005

  • Barthelmy, Scott D.; Barbier, Louis M.; Cummings, Jay R.
  • Space Science Reviews, Vol. 120, Issue 3-4
  • DOI: 10.1007/s11214-005-5096-3

The Swift X-Ray Telescope
journal, October 2005


The relationship between infrared, optical, and ultraviolet extinction
journal, October 1989

  • Cardelli, Jason A.; Clayton, Geoffrey C.; Mathis, John S.
  • The Astrophysical Journal, Vol. 345
  • DOI: 10.1086/167900

Blazars and Cosmic Backgrounds
journal, December 2006

  • Colafrancesco, Sergio; Giommi, Paolo
  • Chinese Journal of Astronomy and Astrophysics, Vol. 6, Issue S1
  • DOI: 10.1088/1009-9271/6/S1/04

GLAST answers about high-energy peaked BL Lacs: double-humped γ-ray peak and extreme accelerators ?
conference, January 2007

  • Costamante, L.; Aharonian, F.; Khangulyan, D.
  • THE FIRST GLAST SYMPOSIUM, AIP Conference Proceedings
  • DOI: 10.1063/1.2757291

TeV candidate BL Lac objects
journal, March 2002


Transformation Properties of External Radiation Fields, Energy‐Loss Rates and Scattered Spectra, and a Model for Blazar Variability
journal, August 2002

  • Dermer, Charles D.; Schlickeiser, Reinhard
  • The Astrophysical Journal, Vol. 575, Issue 2
  • DOI: 10.1086/341431

THE JUNE 2008 FLARE OF MARKARIAN 421 FROM OPTICAL TO TeV ENERGIES
journal, December 2008


Discovery of very high energy gamma-rays from the flat spectrum radio quasar 3C 279 with the MAGIC telescope
conference, January 2008

  • Errando, M.; Bock, R.; Kranich, D.
  • HIGH ENERGY GAMMA-RAY ASTRONOMY: Proceedings of the 4th International Meeting on High Energy Gamma-Ray Astronomy, AIP Conference Proceedings
  • DOI: 10.1063/1.3076698

Correcting for the Effects of Interstellar Extinction
journal, January 1999

  • Fitzpatrick, Edward L.
  • Publications of the Astronomical Society of the Pacific, Vol. 111, Issue 755
  • DOI: 10.1086/316293

A unifying view of the spectral energy distributions of blazars
journal, September 1998


Simultaneous Radio to (Sub-) mm-Monitoring of Variability and Spectral Shape Evolution of potential GLAST Blazars
conference, January 2007

  • Fuhrmann, L.; Zensus, J. A.; Krichbaum, T. P.
  • THE FIRST GLAST SYMPOSIUM, AIP Conference Proceedings
  • DOI: 10.1063/1.2757314

The Swift Gamma‐Ray Burst Mission
journal, August 2004

  • Gehrels, N.; Chincarini, G.; Giommi, P.
  • The Astrophysical Journal, Vol. 611, Issue 2
  • DOI: 10.1086/422091

Bulk acceleration in relativistic jets and the spectral properties of blazars
journal, May 1989

  • Ghisellini, Gabriele; Maraschi, Laura
  • The Astrophysical Journal, Vol. 340
  • DOI: 10.1086/167383

The Einstein Observatory Extended Medium-Sensitivity Survey. I - X-ray data and analysis
journal, February 1990

  • Gioia, I. M.; Maccacaro, T.; Schild, R. E.
  • The Astrophysical Journal Supplement Series, Vol. 72
  • DOI: 10.1086/191426

Evidence for a significant Blazar contamination in CMB anisotropy maps
journal, January 2004


Synchrotron and compton components and their variability in BL Lac objects
conference, January 2001

  • Giommi, P.
  • X-RAY ASTRONOMY: Stellar Endpoints,AGN, and the Diffuse X-ray Background, AIP Conference Proceedings
  • DOI: 10.1063/1.1434657

The sedentary survey of extreme high energy peaked BL Lacs
journal, April 2005


Swift and infra-red observations of the blazar 3C 454.3 during the giant X-ray flare of May 2005
journal, September 2006


Swift detection of all previously undetected blazars in a micro-wave flux-limited sample of WMAP foreground sources
journal, March 2007


AGILE and Swift simultaneous observations of the blazar S50716+714 during the bright flare of October 2007
journal, July 2008


The number counts, luminosity functions, and evolution
of microwave-selected (WMAP) blazars and radio galaxies
journal, October 2009


Jet and Accretion-Disk Emission Untangled in 3C 273
journal, November 2004


The Third EGRET Catalog of High‐Energy Gamma‐Ray Sources
journal, July 1999

  • Hartman, R. C.; Bertsch, D. L.; Bloom, S. D.
  • The Astrophysical Journal Supplement Series, Vol. 123, Issue 1
  • DOI: 10.1086/313231

CRATES: An All‐Sky Survey of Flat‐Spectrum Radio Sources
journal, July 2007

  • Healey, Stephen E.; Romani, Roger W.; Taylor, Gregory B.
  • The Astrophysical Journal Supplement Series, Vol. 171, Issue 1
  • DOI: 10.1086/513742

CGRaBS: An All‐Sky Survey of Gamma‐Ray Blazar Candidates
journal, March 2008

  • Healey, Stephen E.; Romani, Roger W.; Cotter, Garret
  • The Astrophysical Journal Supplement Series, Vol. 175, Issue 1
  • DOI: 10.1086/523302

Readout modes and automated operation of the Swift X-ray Telescope
conference, February 2004

  • Hill, Joanne E.; Burrows, David N.; Nousek, John A.
  • Optical Science and Technology, SPIE's 48th Annual Meeting, SPIE Proceedings
  • DOI: 10.1117/12.505728

Physics of Compact Nonthermal Sources. Theory of Radiation Processes
journal, March 1974

  • Jones, T. W.; O'dell, S. L.; Stein, W. A.
  • The Astrophysical Journal, Vol. 188
  • DOI: 10.1086/152724

The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
journal, September 2005


IDENTIFICATION OF THE EARLY FERMI /LAT GAMMA-RAY BRIGHT OBJECTS WITH EXTRAGALACTIC VLBI SOURCES
journal, November 2009


Broad-band Radio Spectra Variability of 550 AGN in 1997-2001
journal, January 2002

  • Kovalev, Y. Y.; Kovalev, Yu A.; Nizhelsky, N. A.
  • Publications of the Astronomical Society of Australia, Vol. 19, Issue 1
  • DOI: 10.1071/AS01109

Survey of instantaneous 1-22 GHz spectra of 550 compact extragalactic objects with declinations from $-30^\circ$ to $+43^\circ$
journal, November 1999

  • Kovalev, Y. Y.; Nizhelsky, N. A.; Kovalev, Yu. A.
  • Astronomy and Astrophysics Supplement Series, Vol. 139, Issue 3
  • DOI: 10.1051/aas:1999406

The Fifth VLBA Calibrator Survey: VCS5
journal, February 2007

  • Kovalev, Y. Y.; Petrov, L.; Fomalont, E. B.
  • The Astronomical Journal, Vol. 133, Issue 4
  • DOI: 10.1086/511157

The Relation Between agn Gamma-Ray Emission and Parsec-Scale Radio jets
journal, April 2009


ASCA Observations of Blazars and Multiband Analysis
journal, September 1998

  • Kubo, H.; Takahashi, T.; Madejski, G.
  • The Astrophysical Journal, Vol. 504, Issue 2
  • DOI: 10.1086/306125

A CONNECTION BETWEEN APPARENT VLBA JET SPEEDS AND INITIAL ACTIVE GALACTIC NUCLEUS DETECTIONS MADE BY THE FERMI GAMMA-RAY OBSERVATORY
journal, April 2009


Optical spectroscopy and polarization of a new sample of optically bright flat radio spectrum sources
journal, July 1996

  • Marcha, M. J. M.; Browne, I. W. A.; Impey, C. D.
  • Monthly Notices of the Royal Astronomical Society, Vol. 281, Issue 2
  • DOI: 10.1093/mnras/281.2.425

Roma-BZCAT: a multifrequency catalogue of blazars
journal, December 2008


Log-parabolic spectra and particle acceleration in blazars: III. SSC emission in the TeV band from Mkn 501
journal, March 2006


Multifrequency observations of a sample of very low frequency peaked BL Lacertae objects
journal, March 2010


The USNO-B Catalog
journal, February 2003

  • Monet, David G.; Levine, Stephen E.; Canzian, Blaise
  • The Astronomical Journal, Vol. 125, Issue 2
  • DOI: 10.1086/345888

Spectral energy distributions of a large sample of BL Lacertae objects
journal, December 2005


Host galaxy subtraction of TeV candidate BL Lacertae objects
journal, September 2007


The connection between x-ray- and radio-selected BL Lacertae objects
journal, May 1995

  • Padovani, Paolo; Giommi, Paolo
  • The Astrophysical Journal, Vol. 444
  • DOI: 10.1086/175631

The ROSAT X-ray spectra of BL Lacertae objects
journal, March 1996

  • Padovani, P.; Giommi, P.
  • Monthly Notices of the Royal Astronomical Society, Vol. 279, Issue 2
  • DOI: 10.1093/mnras/279.2.526

What Types of Jets Does Nature Make? A New Population of Radio Quasars
journal, May 2003

  • Padovani, Paolo; Perlman, Eric S.; Landt, Hermine
  • The Astrophysical Journal, Vol. 588, Issue 1
  • DOI: 10.1086/373899

Filling the infrared gap: ISO observations of 1 Jy BL Lacertae objects
journal, August 2006


First AGILE catalog of high-confidence gamma-ray sources
journal, September 2009


Jet opening angles and gamma-ray brightness of AGN
journal, October 2009


Photometric calibration of the Swift ultraviolet/optical telescope: Photometric calibration of the Swift UVOT
journal, December 2007


The WEBT campaign to observe AO 0235+16 in the 2003–2004 observing season: Results from radio-to-optical monitoring and XMM-Newton observations
journal, July 2005


The high activity of 3C 454.3 in autumn 2007: Monitoring by the WEBT during the AGILE detection
journal, May 2008


Radio-to-UV monitoring of AO 0235+164 by the WEBT and Swift during the 2006–2007 outburst
journal, January 2008


A limit of the anisotropy of the microwave background radiation on arc minute scales
journal, November 1989

  • Readhead, A. C. S.; Lawrence, C. R.; Myers, S. T.
  • The Astrophysical Journal, Vol. 346
  • DOI: 10.1086/168039

The Swift Ultra-Violet/Optical Telescope
journal, October 2005

  • Roming, Peter W. A.; Kennedy, Thomas E.; Mason, Keith O.
  • Space Science Reviews, Vol. 120, Issue 3-4
  • DOI: 10.1007/s11214-005-5095-4

On the Spectral Energy Distributions of Blazars
journal, May 1996

  • Sambruna, Rita M.; Maraschi, Laura; Urry, C. Megan
  • The Astrophysical Journal, Vol. 463
  • DOI: 10.1086/177260

Relativistic beaming and gamma-ray brightness of blazars
journal, March 2010


Maps of Dust Infrared Emission for Use in Estimation of Reddening and Cosmic Microwave Background Radiation Foregrounds
journal, June 1998

  • Schlegel, David J.; Finkbeiner, Douglas P.; Davis, Marc
  • The Astrophysical Journal, Vol. 500, Issue 2
  • DOI: 10.1086/305772

Comptonization of diffuse ambient radiation by a relativistic jet: The source of gamma rays from blazars?
journal, January 1994

  • Sikora, Marek; Begelman, Mitchell C.; Rees, Martin J.
  • The Astrophysical Journal, Vol. 421
  • DOI: 10.1086/173633

On the Nature of MeV Blazars
journal, September 2002

  • Sikora, M.; Błażejowski, M.; Moderski, R.
  • The Astrophysical Journal, Vol. 577, Issue 1
  • DOI: 10.1086/342164

The complete sample of 1 Jansky BL Lacertae objects. I - Summary properties
journal, June 1991

  • Stickel, M.; Fried, J. W.; Kuehr, H.
  • The Astrophysical Journal, Vol. 374
  • DOI: 10.1086/170133

The AGILE space mission
journal, April 2008

  • Tavani, M.; Barbiellini, G.; Argan, A.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 588, Issue 1-2
  • DOI: 10.1016/j.nima.2008.01.023

Calibration of the Energetic Gamma-Ray Experiment Telescope (EGRET) for the Compton Gamma-Ray Observatory
journal, May 1993

  • Thompson, D. J.; Bertsch, D. L.; Fichtel, C. E.
  • The Astrophysical Journal Supplement Series, Vol. 86
  • DOI: 10.1086/191793

Extragalactic source counts and contributions to the anisotropies of the cosmic microwave background: predictions for the Planck Surveyor mission
journal, June 1998


Signatures of synchrotron emission and of electron acceleration in the X-ray spectra of Mrk 421
journal, February 2007


A numerical code to study the variability of Blazar emission
journal, October 2003


Unified Schemes for Radio-Loud Active Galactic Nuclei
journal, June 1995

  • Urry, C. Megan; Padovani, Paolo
  • Publications of the Astronomical Society of the Pacific, Vol. 107
  • DOI: 10.1086/133630

MULTIWAVELENGTH OBSERVATIONS OF 3C 454.3. I. THE AGILE 2007 NOVEMBER CAMPAIGN ON THE “ CRAZY DIAMOND
journal, December 2008


The radio delay of the exceptional 3C 454.3 outburst: Follow-up WEBT observations in 2005–2006
journal, January 2007


Multifrequency monitoring of the blazar 0716+714 during the GASP-WEBT-AGILE campaign of 2007
journal, February 2008


High-Energy Gamma-Ray Emission from Active Galaxies: EGRET Observations and Their Implications
journal, February 1995

  • von Montigny, C.; Bertsch, D. L.; Chiang, J.
  • The Astrophysical Journal, Vol. 440
  • DOI: 10.1086/175294

TeV Gamma-ray Astronomy: The Story So Far
conference, January 2008

  • Weekes, Trevor C.; Aharonian, Felix A.; Hofmann, Werner
  • HIGH ENERGY GAMMA-RAY ASTRONOMY: Proceedings of the 4th International Meeting on High Energy Gamma-Ray Astronomy, AIP Conference Proceedings
  • DOI: 10.1063/1.3076692

    Works referencing / citing this record:

    Discovery of very high energy γ -ray emission from the BL Lacertae object PKS 0301−243 with H.E.S.S.
    journal, November 2013


    Active galactic nuclei: what’s in a name?
    journal, August 2017

    • Padovani, P.; Alexander, D. M.; Assef, R. J.
    • The Astronomy and Astrophysics Review, Vol. 25, Issue 1
    • DOI: 10.1007/s00159-017-0102-9

    Unprecedented study of the broadband emission of Mrk 421 during flaring activity in March 2010
    journal, May 2015


    Empirical multi-wavelength prediction method for very high energy gamma-ray emitting BL Lacertae objects
    journal, December 2017


    Long-term optical monitoring of TeV emitting blazars: I. Data analysis⋆
    journal, December 2018


    1WHSP: An IR-based sample of ~1000 VHE γ -ray blazar candidates
    journal, June 2015


    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⋆
    journal, February 2015


    Gamma-ray active galactic nucleus type through machine-learning algorithms
    journal, October 2012

    • Hassan, T.; Mirabal, N.; Contreras, J. L.
    • Monthly Notices of the Royal Astronomical Society, Vol. 428, Issue 1
    • DOI: 10.1093/mnras/sts022

    Properties of optically selected BL Lacertae candidates from the SDSS
    journal, September 2014


    Near-infrared and gamma-ray monitoring of TANAMI gamma-ray bright sources
    journal, June 2013


    The TANAMI Multiwavelength Program: Dynamic spectral energy distributions of southern blazars
    journal, June 2016


    2WHSP: A multi-frequency selected catalogue of high energy and very high energy γ -ray blazars and blazar candidates
    journal, January 2017


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


    Correlation between Fermi /LAT gamma-ray and 37 GHz radio properties of northern AGN averaged over 11 months
    journal, November 2011


    Searching for γ -ray signature in WHSP blazars
    journal, February 2017


    The seven year Swift -XRT point source catalog (1SWXRT)
    journal, March 2013


    Simultaneous Planck , Swift , and Fermi observations of X-ray and γ -ray selected blazars
    journal, May 2012


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


    The large gamma-ray flare of the flat-spectrum radio quasar PKS 0346−27
    journal, July 2019


    Optical observations of BL Lac object ON 231 (W Comae) during 2010 March–April
    journal, January 2013

    • Cheng, Xin-Lun; Zhang, You-Hong; Xu, Lei
    • Monthly Notices of the Royal Astronomical Society, Vol. 429, Issue 4
    • DOI: 10.1093/mnras/sts329

    Intra-day optical multi-band quasi-simultaneous observation of BL Lacertae object S5 0716+714 from 2013 to 2016
    journal, June 2018

    • Zhang, Xiaoyuan; Wu, Jianghua; Meng, Nankun
    • Monthly Notices of the Royal Astronomical Society, Vol. 478, Issue 3
    • DOI: 10.1093/mnras/sty1468

    Multicolour optical and near-infrared variability of the blazar PKS 2155–304 on diverse time-scales
    journal, July 2018

    • Li, Xiao-Pan; Yang, Hai-Yan; Luo, Yu-Hui
    • Monthly Notices of the Royal Astronomical Society, Vol. 479, Issue 3
    • DOI: 10.1093/mnras/sty1734

    Extreme- and high-synchrotron-peaked blazars at the limit of Fermi-LAT detectability: the γ-ray spectrum of 1BIGB sources
    journal, July 2018

    • Arsioli, B.; Barres de Almeida, U.; Prandini, E.
    • Monthly Notices of the Royal Astronomical Society, Vol. 480, Issue 2
    • DOI: 10.1093/mnras/sty1975

    Signature of Stochastic Acceleration and Cooling Processes in an Outburst Phase of the TeV Blazar ON 231
    journal, July 2019

    • Kalita, Nibedita; Sawangwit, Utane; Gupta, Alok C.
    • The Astrophysical Journal, Vol. 880, Issue 1
    • DOI: 10.3847/1538-4357/ab2765

    On the Jet Properties of γ -Ray-loud Active Galactic Nuclei
    journal, April 2018


    Fermi -LAT Stacking Analysis Technique: An Application to Extreme Blazars and Prospects for their CTA Detection
    journal, August 2019

    • Paliya, Vaidehi S.; Domínguez, A.; Ajello, M.
    • The Astrophysical Journal, Vol. 882, Issue 1
    • DOI: 10.3847/2041-8213/ab398a

    Active galactic nuclei: what’s in a name?
    journal, August 2017

    • Padovani, P.; Alexander, D. M.; Assef, R. J.
    • The Astronomy and Astrophysics Review, Vol. 25, Issue 1
    • DOI: 10.1007/s00159-017-0102-9

    Correlation between Fermi /LAT gamma-ray and 37 GHz radio properties of northern AGN averaged over 11 months
    journal, November 2011


    Simultaneous Planck , Swift , and Fermi observations of X-ray and γ -ray selected blazars
    journal, May 2012


    Limits on the extragalactic background light in the Fermi era
    journal, June 2012


    The seven year Swift -XRT point source catalog (1SWXRT)
    journal, March 2013


    Near-infrared and gamma-ray monitoring of TANAMI gamma-ray bright sources
    journal, June 2013


    Discovery of very high energy γ -ray emission from the BL Lacertae object PKS 0301−243 with H.E.S.S.
    journal, November 2013


    Properties of optically selected BL Lacertae candidates from the SDSS
    journal, September 2014


    1WHSP: An IR-based sample of ~1000 VHE γ -ray blazar candidates
    journal, June 2015


    Unprecedented study of the broadband emission of Mrk 421 during flaring activity in March 2010
    journal, May 2015


    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⋆
    journal, February 2015


    The TANAMI Multiwavelength Program: Dynamic spectral energy distributions of southern blazars
    journal, June 2016


    Searching for γ -ray signature in WHSP blazars
    journal, February 2017


    2WHSP: A multi-frequency selected catalogue of high energy and very high energy γ -ray blazars and blazar candidates
    journal, January 2017


    Empirical multi-wavelength prediction method for very high energy gamma-ray emitting BL Lacertae objects
    journal, December 2017


    Long-term optical monitoring of TeV emitting blazars: I. Data analysis⋆
    journal, December 2018


    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


    The large gamma-ray flare of the flat-spectrum radio quasar PKS 0346−27
    journal, July 2019


    Strong new Constraints on the Extragalactic Background Light in the Near- to Mid-Infrared
    journal, May 2011


    Seed Photon Fields of Blazars in the Internal Shock Scenario
    journal, April 2014


    Gamma-ray active galactic nucleus type through machine-learning algorithms
    journal, October 2012

    • Hassan, T.; Mirabal, N.; Contreras, J. L.
    • Monthly Notices of the Royal Astronomical Society, Vol. 428, Issue 1
    • DOI: 10.1093/mnras/sts022

    Optical observations of BL Lac object ON 231 (W Comae) during 2010 March–April
    journal, January 2013

    • Cheng, Xin-Lun; Zhang, You-Hong; Xu, Lei
    • Monthly Notices of the Royal Astronomical Society, Vol. 429, Issue 4
    • DOI: 10.1093/mnras/sts329

    The observed radio/gamma-ray emission correlation for blazars with the Fermi-LAT and the RATAN-600 data
    journal, May 2015

    • Mufakharov, T.; Mingaliev, M.; Sotnikova, Yu.
    • Monthly Notices of the Royal Astronomical Society, Vol. 450, Issue 3
    • DOI: 10.1093/mnras/stv772

    Intra-day optical multi-band quasi-simultaneous observation of BL Lacertae object S5 0716+714 from 2013 to 2016
    journal, June 2018

    • Zhang, Xiaoyuan; Wu, Jianghua; Meng, Nankun
    • Monthly Notices of the Royal Astronomical Society, Vol. 478, Issue 3
    • DOI: 10.1093/mnras/sty1468

    Multicolour optical and near-infrared variability of the blazar PKS 2155–304 on diverse time-scales
    journal, July 2018

    • Li, Xiao-Pan; Yang, Hai-Yan; Luo, Yu-Hui
    • Monthly Notices of the Royal Astronomical Society, Vol. 479, Issue 3
    • DOI: 10.1093/mnras/sty1734

    Extreme- and high-synchrotron-peaked blazars at the limit of Fermi-LAT detectability: the γ-ray spectrum of 1BIGB sources
    journal, July 2018

    • Arsioli, B.; Barres de Almeida, U.; Prandini, E.
    • Monthly Notices of the Royal Astronomical Society, Vol. 480, Issue 2
    • DOI: 10.1093/mnras/sty1975

    The radio-γ-ray connection in Fermi blazars: γ-ray-radio flux correlation in blazars
    journal, March 2011


    The transition between BL Lac objects and flat spectrum radio quasars: FSRQs and BL Lacs
    journal, May 2011


    Signature of Stochastic Acceleration and Cooling Processes in an Outburst Phase of the TeV Blazar ON 231
    journal, July 2019

    • Kalita, Nibedita; Sawangwit, Utane; Gupta, Alok C.
    • The Astrophysical Journal, Vol. 880, Issue 1
    • DOI: 10.3847/1538-4357/ab2765

    On the Jet Properties of γ -Ray-loud Active Galactic Nuclei
    journal, April 2018


    New Hard-TeV Extreme Blazars Detected with the MAGIC Telescopes
    journal, February 2020

    • Acciari, V. A.; Ansoldi, S.; Antonelli, L. A.
    • The Astrophysical Journal Supplement Series, Vol. 247, Issue 1
    • DOI: 10.3847/1538-4365/ab5b98

    Fermi -LAT Stacking Analysis Technique: An Application to Extreme Blazars and Prospects for their CTA Detection
    journal, August 2019

    • Paliya, Vaidehi S.; Domínguez, A.; Ajello, M.
    • The Astrophysical Journal, Vol. 882, Issue 1
    • DOI: 10.3847/2041-8213/ab398a