Results 71 to 80 of about 34,519 (239)

Investigation of Two Fermi-LAT Gamma-Ray Blazars Coincident with High-energy Neutrinos Detected by IceCube [PDF]

Astrophysical Journal, 2019
After the identification of the gamma-ray blazar TXS 0506+056 as the first compelling IceCube neutrino source candidate, we perform a systematic analysis of all high-energy neutrino events satisfying the IceCube realtime trigger criteria.
Fermi-LAT collaboration S. Garrappa, S. Buson, A. Franckowiak, ASAS-SN B. J. Shappee, J. Beacom, S. Dong, T. Holoien, C. Kochanek, J. Prieto, K. Stanek, T. Thompson, I. C. M. Aartsen, M. Ackermann, J. Adams, J. Aguilar, M. Ahlers, M. Ahrens, C. Alispach, D. Altmann, K. Andeen, T. Anderson, I. Ansseau, G. Anton, C. Arguelles, J. Auffenberg, S. Axani, P. Backes, H. Bagherpour, X. Bai, A. Barbano, S. Barwick, V. Baum, R. Bay, J. Beatty, K. Becker, J. Tjus, S. Benzvi, D. Berley, E. Bernardini, D. Besson, G. Binder, D. Bindig, E. Blaufuss, S. Blot, C. Bohm, M. Borner, S. Boser, O. Botner, E. Bourbeau, J. Bourbeau, F. Bradascio, J. Braun, H. Bretz, S. Bron, J. Brostean-Kaiser, A. Burgman, R. Busse, T. Carver, C. Chen, E. Cheung, D. Chirkin, K. Clark, L. Classen, G. Collin, J. Conrad, P. Coppin, P. Correa, D. Cowen, R. Cross, P. Dave, J. Andr'e, C. Clercq, J. DeLaunay, H. Dembinski, K. Deoskar, S. Ridder, P. Desiati, K. D. Vries, G. Wasseige, M. With, T. DeYoung, J. C. D. az-V'elez, H. Dujmovic, M. Dunkman, E. Dvorak, B. Eberhardt, T. Ehrhardt, P. Eller, P. Evenson, S. Fahey, A. Fazely, J. Felde, K. Filimonov, C. Finley, E. Friedman, A. Fritz, T. Gaisser, J. Gallagher, E. Ganster, S. Garrappa, L. Gerhardt, K. Ghorbani, T. Glauch, T. Glusenkamp, A. Goldschmidt, J. G. Gonzalez, D. Grant, Z. Griffith, M. Gunder, M. Gunduz, C. Haack, A. Hallgren, L. Halve, F. Halzen, K. Hanson, D. Hebecker, D. Heereman, K. Helbing, R. Hellauer, F. Henningsen, S. Hickford, J. Hignight, G. Hill, K. Hoffman, R. Hoffmann, T. Hoinka, B. Hokanson-Fasig, K. Hoshina, F. Huang, M. Huber, K. Hultqvist, Mirco Hünnefeld, R. Hussain, S. In, N. Iovine, A. Ishihara, E. Jacobi, G. Japaridze, M. Jeong, K. Jero, B. Jones, W. Kang, A. Kappes, D. Kappesser, T. Karg, M. Karl, A. Karle, U. Katz, M. Kauer, A. Keivani, J. Kelley, A. Kheirandish, J. Kim, T. Kintscher, J. Kiryluk, T. Kittler, S. Klein, R. Koirala, H. Kolanoski, L. Kopke, C. Kopper, S. Kopper, D. Koskinen, M. Kowalski, K. Krings, G. Kruckl, N. Kulacz, S. Kunwar, N. Kurahashi, A. Kyriacou, M. Labare, J. Lanfranchi, M. Larson, F. Lauber, J. Lazar, K. Leonard, M. Leuermann, Q. Liu, E. Lohfink, C. J. L. Mariscal, L. Lu, F. Lucarelli, J. Lunemann, W. Luszczak, J. Madsen, G. Maggi, K. Mahn, Y. Makino, K. Mallot, S. Mancina, I. Marics, R. Maruyama, K. Mase, R. Maunu, K. Meagher, M. Medici, A. Medina, M. Meier, S. Meighen-Berger, T. Menne, G. Merino, T. Meures, S. Miarecki, J. Micallef, G. Moment'e, T. Montaruli, R. Moore, M. Moulai, R. Nagai, R. Nahnhauer, P. Nakarmi, U. Naumann, G. Neer, H. Niederhausen, S. Nowicki, D. Nygren, A. Pollmann, A. Olivas, A. O'Murchadha, E. O’Sullivan, T. Palczewski, H. Pandya, D. Pankova, N. Park, P. Peiffer, C. Heros, D. Pieloth, E. Pinat, A. Pizzuto, M. Plum, P. Price, G. Przybylski, C. Raab, A. Raissi, M. Rameez, L. Rauch, K. Rawlins, I. C. Rea, R. Reimann, B. Relethford, G. Renzi, E. Resconi, W. Rhode, M. Richman, S. Robertson, M. Rongen, C. Rott, T. Ruhe, D. Ryckbosch, D. Rysewyk, I. Safa, S. Herrera, A. Sandrock, J. Sandroos, M. Santander, S. Sarkar, K. Satalecka, M. Schaufel, P. Schlunder, T. Schmidt, A. Schneider, J. Schneider, L. Schumacher, S. Sclafani, D. Seckel, S. Seunarine, M. Silva, R. Snihur, J. Soedingrekso, D. Soldin, M. Song, G. Spiczak, C. Spiering, J. Stachurska, M. Stamatikos, T. Stanev, Alexander Stasik, R. Stein, J. Stettner, A. Steuer, T. Stezelberger, R. Stokstad, A. Stossl, N. Strotjohann, T. Stuttard, G. Sullivan, M. Sutherland, I. Taboada, F. Tenholt, S. Ter-Antonyan, A. Terliuk, S. Tilav, L. Tomankova, C. Tonnis, S. Toscano, D. Tosi, M. Tselengidou, C. Tung, A. Turcati, R. Turcotte, C. Turley, B. Ty, E. Unger, M. U. Elorrieta, M. Usner, J. Vandenbroucke, W. Driessche, D. Eijk, N. Eijndhoven, S. Vanheule, J. Santen, M. Vraeghe, C. Walck, A. Wallace, M. Wallraff, N. Wandkowsky, T. B. Watson, C. Weaver, M. Weiss, J. Weldert, C. Wendt, J. Werthebach, S. Westerhoff, B. Whelan, N. Whitehorn, K. Wiebe, C. Wiebusch, L. Wille, D. Williams, L. Wills, M. Wolf, J. Wood, T. R. Wood, K. Woschnagg, G. Wrede, D. Xu, X. Xu, Y. Xu, J. Yáñez, G. Yodh, S. Yoshida, T. Yuan   +341 more
semanticscholar   +1 more source

Long-Term Optical Monitoring of Blazars

Galaxies, 2019
Systematic monitoring of specific targets in the optical regime was historically applied on a very narrow sample of known variable stars. The discovery of blazars in the 20th century brought to the foreground the need for new global sky surveys, covering
Kosmas Gazeas
doaj   +1 more source

Identifying the 3FHL Catalog. VI. Results of the 2019 Gemini Optical Spectroscopy

The Astronomical Journal, 2023
Active galactic nuclei with their relativistic jets pointed toward the observer are a class of luminous gamma-ray sources commonly known as blazars. The study of this source class is essential to unveil the physical processes powering these extreme jets,
M. Rajagopal, L. Marcotulli, K. Labrie, S. Marchesi, M. Ajello   +4 more
doaj   +1 more source

Infrared Colors of the gamma-ray detected blazars

, 2012
Blazars constitute the most enigmatic class of extragalactic gamma-ray sources, and their observational features have been ascribed to a relativistic jet closely aligned to the line of sight.
Abdo, Ackermann, Blandford, Cavaliere, Cutri, Dermer, F. Massaro, G. Tosti, Giommi, Giroletti, Howard A. Smith, J. E. Grindlay, Kovalev, M. Ajello, Massaro, Massaro, Massaro, Massaro, Padovani, Padovani, R. D'Abrusco, Taylor, The Fermi-LAT Collaboration, Wright   +23 more
core   +1 more source

Implications of Variability Patterns observed in TeV Blazars on the Structure of the Inner Jet [PDF]

, 2002
The recent long look X-ray observations of TeV blazars have revealed many important new features concerning their time variability. In this paper, we suggest a physical interpretation for those features based on the framework of the internal and external
Bell A. R., Chiharu Tanihata, Dermer C. D., Greg M. Madejski, Jones F. C., Jun Kataoka, Kirk J. G., Rees M. J., Tadayuki Takahashi   +8 more
core   +2 more sources

On the origin of gamma-rays in Fermi blazars: beyondthe broad-line region [PDF]

, 2018
The gamma-ray emission in broad-line blazars is generally explained as inverse Compton (IC) radiation of relativistic electrons in the jet scattering optical-UV photons from the Broad Line Region (BLR), the so-called BLR External Compton scenario.
L. Costamante, L. Costamante, L. Costamante, S. Cutini, G. Tosti, E. Antolini, A. Tramacere   +6 more
semanticscholar   +1 more source

Study on the Gamma-Ray Radiation Properties of High-Redshift Blazars at z > 2.5

Universe
The high-redshift blazars are important cosmological probes for exploring the early universe and unraveling the fundamental emission processes and the structure of the active galactic nuclei.
Fan Wu, Li Zhang, Benzhong Dai
doaj   +1 more source

Incidence of MgII absorbers towards Blazars and the GRB/QSO puzzle

, 2010
In order to investigate the origin of the excess of strong MgII systems towards GRB afterglows as compared to QSO sightlines, we have measured the incidence of MgII absorbers towards a third class of objects: the Blazars.
Abdo, Angel, B. Ménard, Bartelmann, Becker, Bergeron, Bergeron, Bergeron, Blades, Choi, Cohen, Collinge, Conselice, Drinkwater, Ellison, Elvis, Falle, Fan, Fan, Fragile, Frank, Gehrels, Giovannini, Hall, Hao, Heidt, Impey, Impey, J. Bergeron, Jannuzi, Kaiser, Kanekar, Komissarov, Londish, Londish, Mellema, Mukherjee, Ménard, Ménard, Narayan, Nestor, P. Boissé, Padovani, Padovani, Pian, Piner, Piner, Plotkin, Pontzen, Porciani, Prochter, Prochter, Rao, Rao, Rector, Sbarufatti, Sbarufatti, Scranton, Smith, Steidel, Steidel, Steidel, Stickel, Stocke, Sudilovsky, Sudilovsky, Tavecchio, Tejos, Tejos, Vergani, Wild, Wolfe, Young   +72 more
core   +2 more sources

Characteristic Variability Timescales in the Gamma-Ray Power Spectra of Blazars [PDF]

Astrophysical Journal, 2019
Characteristic variability timescales in blazar γ-ray light curves can provide insights into the physical processes responsible for γ-ray variability. The power spectral density (PSD) is capable of revealing such timescales, which may appear as breaks or
J. Ryan, A. Siemiginowska, M. Sobolewska, J. Grindlay   +3 more
semanticscholar   +1 more source

Cellular Therapy for Systemic Autoimmune Diseases: New Opportunities for Future Research and Interdisciplinary Collaboration

ACR Open Rheumatology, Volume 7, Issue 11, November 2025.
Systemic autoimmune diseases (sAIDs) affect 1 in 10 people and represent a leading cause of death in women under the age of 65 years. Despite the emergence of targeted‐biologic therapies, mortality rates for sAIDs have not improved. Emerging cellular therapies represent a promising therapeutic strategy for patients living with sAIDs given their ...
Elizabeth R. Volkmann, Sencer Goklemez, John Varga, Bruce R. Blazar, Steven Z. Pavletic   +4 more
wiley   +1 more source