Results 31 to 40 of about 23,536 (235)
The CLASS blazar survey: testing the blazar sequence [PDF]
Monthly Notices of the Royal Astronomical Society, 2004 We discuss the properties of the sources in the CLASS Blazar survey which aims at the selection of low radio power (P(5GHz)<10^25 W Hz^-1) blazars. We use VLA data from available catalogues and from our own observations to constrain the radio core-dominance of the sample which, together with the flat radio spectral index, is a signature of the ...Caccianiga, A., Marcha, M. J. M.openaire +2 more sourcesBL Lac Contribution to the Extragalactic Gamma-Ray Background [PDF]
, 2007 Very high energy gamma-rays from blazars traversing cosmological distances
through the metagalactic radiation field can convert into electron-positron
pairs in photon-photon collisions. The converted gamma-rays initiate
electromagnetic cascades driven by Aharonian, Aharonian, Aharonian, Bade, Beckmann, Chiang, Coppi, Costamante, Costamante, Fossati, Ghisellini, Gioia, Giommi, Gorbunov, Hunter, K. Mannheim, Kneiske, Kneiske, Kronberg, Laurent-Mühleisen, Maciolek-Niedzwiecki, Mannheim, Mannheim, Protheroe, Protheroe, Rector, Reimer, Reimer, Reimer, Ryu, Sigl, Sreekumar, Stawarz, Stawarz, Stecker, T. M. Kneiske, Waxman, Wei +37 morecore +2 more sourcesThe Nature of Micro-Variability in Blazars
Galaxies, 2021 We present the results of a long-term study designed to investigate the nature of micro-variability in blazars carried out primarily at the Southeastern Association for Research in Astronomy (SARA) observatories.James R. Webb, Viviana Arroyave, Douglas Laurence, Stephen Revesz, Gopal Bhatta, Hal Hollingsworth, Sarah Dhalla, Emily Howard, Michael Cioffi +8 moredoaj +1 more sourceThe space density of z>4 blazars [PDF]
, 2019 High redshift blazars are an important class of Active Galactic Nuclei (AGN)
that can provide an independent estimate of the supermassive black-hole mass
function in high redshift radio-loud AGN without the bias due to absorption
along the line-of-sight. Antón, Sonia, Ballo, Lucia, Belladitta, Silvia, Caccianiga, Alessandro, Cicone, Claudia, Dallacasa, Daniele, Della Ceca, Roberto, Gargiulo, Adriana, Ighina, Luca, Marchã, Maria J., Moretti, Alberto, Severgnini, Paola +11 morecore +2 more sourcesNear infrared polarimetry of a sample of blazars*
EPJ Web of Conferences, 2013 Polarization variability is one of the most ubiquitous characteristic of blazars. Near infrared (NIR)polarization measurements of blazars are not common, contrary to the optical ones.Pulido J. A. Acosta, Pereyra A., Agudo I., Agulli I., Carnerero M., Segura N. Castro, Gómez J.L., Jorstad S., Marscher A. +8 moredoaj +1 more sourceThe Spectral Energy Distribution of Fermi bright blazars [PDF]
, 2009 (Abridged) We have conducted a detailed investigation of the broad-band
spectral properties of the \gamma-ray selected blazars of the Fermi LAT Bright
AGN Sample (LBAS).A. A. Abdo, A. A. Arkharov, A. A. Moiseev, A. Berdyugin, A. Brez, A. Chekhtman, A. de Angelis, A. Falcone, A. Giuliani, A. K. Harding, A. Makeev, A. Morselli, A. P. Marscher, A. P. Waite, A. Reimer, A. S. Johnson, A. Sadun, A. Sander, A. Sellerholm, A. Tramacere, A. W. Borgland, A. Y. Rodriguez, Abdo, Abdo, Abdo, Abdo, Abdo, Acciari, Acciari, Aharonian, Ajello, Ajello, Albert, Albert, Albert, Angelakis, Atwood, B. Berenji, B. Giebels, B. L. Winer, B. Lott, B. M. Baughman, Baars, Bessel, Blandford, C. Cecchi, C. D. Dermer, C. Farnier, C. Favuzzi, C. Gronwall, C. Meurer, C. Monte, C. Pagani, C. Pittori, C. Raiteri, C. Sgrò, Colafrancesco, Costamante, D. A. Smith, D. Bastieri, D. Burrows, D. Carosati, D. Dultzin, D. Dumora, D. F. Torres, D. Gasparrini, D. Hadasch, D. Hiriart, D. Horan, D. J. Suson, D. J. Thompson, D. Paneque, D. Parent, D. Sanchez, Dermer, Donnarumma, E. A. Hoversten, E. Angelakis, E. Benitez, E. Bonamente, E. Cavazzuti, E. Charles, E. D. Bloom, E. do Couto e Silva, E. Forné, E. Hays, E. J. Siskind, E. Koptelova, E. Lindfors, E. N. Kopatskaya, E. Nuss, E. Orlando, Errando, F. D'ammando, F. de Palma, F. Gargano, F. Giordano, F. Longo, F. Loparco, F. Marshall, F. Piron, F. Rahoui, F. Ryde, F. Verrecchia, Fuhrmann, G. A. Caliandro, G. Barbiellini, G. Chincarini, G. Godfrey, G. Jóhannesson, G. Kimeridze, G. M. Madejski, G. Spandre, G. Stratta, G. Tosti, G. V. Zhekanis, Gehrels, Ghisellini, Giommi, Giommi, Giommi, H. D. Aller, H. F.-W. Sadrozinski, H. Katagiri, H. Tajima, H. Takahashi, Hartman, Healey, Healey, I. A. Grenier, I. Agudo, I. Donnarumma, I. Nestoras, I. V. Moskalenko, J. A. Ros, J. A. Zensus, J. B. Thayer, J. Ballet, J. Bregeon, J. Chiang, J. Cohen-Tanugi, J. Conrad, J. D. Scargle, J. E. Grove, J. E. McEnery, J. F. Ormes, J. G. Thayer, J. H. Panetta, J. Heidt, J. Kataoka, J. Kennea, J. Knödlseder, J. L. Gómez, J. L. Richards, J. Lande, J. M. Casandjian, J. Osborne, J. P. Norris, J.-L. Starck, K. Bechtol, K. Nilsson, K. Page, K. S. Wood, Korolkov, Kovalev, Kovalev, Kovalev, Kubo, L. A. Sigua, L. Baldini, L. Calzoletti, L. Costamante, L. Fuhrmann, L. Guillemot, L. Latronico, L. O. Takalo, L. Pacciani, L. R. Cominsky, L. S. Rochester, L. Tibaldo, Lagage, Lister, M. A. Gurwell, M. Ackermann, M. Ajello, M. Axelsson, M. Boettcher, M. Brigida, M. Capalbi, M. E. Monzani, M. F. Aller, M. Frailis, M. Hayashida, M. Kadler, M. Kerr, M. Kuss, M. L. Kocian, M. N. Lovellette, M. N. Mazziotta, M. Ozaki, M. Pasanen, M. Pepe, M. Perri, M. Pesce-Rollins, M. Razzano, M. Roth, M. S. Jackson, M. S. Shaw, M. S. Strickman, M. Stevenson, M. Villata, M. Ziegler, Marchã, Mazziotta, Monet, Moretti, N. A. Nizhelsky, N. Gehrels, N. Giglietto, N. Kawai, N. Omodei, N. Vilchez, O. M. Kurtanidze, O. Reimer, Ott, P. A. Caraveo, P. Bruel, P. D. Smith, P. F. Michelson, P. Fortin, P. Fusco, P. Giommi, P. L. Nolan, P. Leto, P. Lubrano, P. M. Saz Parkinson, P. Marchegiani, P. Padovani, P. Roustazadeh, P. S. Drell, P. Spinelli, P. Wang, Padovani, Padovani, Poole, R. A. Cameron, R. Bellazzini, R. Claus, R. D. Blandford, R. Deitrick, R. Dubois, R. E. Hughes, R. Itoh, R. Ojha, R. Rando, R. W. Romani, S. Buson, S. Chaty, S. Ciprini, S. Colafrancesco, S. Cutini, S. E. Healey, S. Funk, S. G. Jorstad, S. Germani, S. Guiriec, S. J. Fegan, S. Murgia, S. Piranomonte, S. Puccetti, S. Rainò, S. Ritz, S. W. Digel, Schlegel, Sikora, T. A. Porter, T. Glanzman, T. H. Burnett, T. Kamae, T. L. Usher, T. Mizuno, T. Ohsugi, T. Reposeur, T. S. Konstantinova, T. Takahashi, T. Tanaka, T. Ylinen, Teshima, Tramacere, U. Bach, V. D'Elia, V. M. Larionov, V. Pavlidou, V. Pelassa, V. Vasileiou, V. Vitale, Vercellone, W. B. Focke, W. Max-Moerbeck, W. McConville, W. Mitthumsiri, W. N. Johnson, W. P. Chen, Weekes, Y. Fukazawa, Y. Hanabata, Y. Uchiyama, Y. Y. Kovalev, Yu. A. Kovalev, Ö. Çelik +309 morecore +4 more sourcesDiscovery of Hidden Blazars [PDF]
Science, 2001 Every radio-loud quasar may have blazar activities, according to a unified scheme where the differences in both optical and radio observations of radio-loud quasars are the result of different viewing angles. We have predicted that blazars may be detected using emission line ratio variations caused by variable illumination of gas clouds in the broad ...Ma, Feng, Wills, Beverley J.openaire +3 more sources
