Results 141 to 150 of about 34,519 (239)

Time-Evolving SED of MKN421: A Multi-Band View and Polarimetric Signatures

Frontiers in Astronomy and Space Sciences, 2018
The most detailed temporal studies of the emission from blazars are usually done by trying to obtain a dense, simultaneous coverage of the source over a large multi-wavelength observational campaign.
Bernardo M. O. Fraga, Ulisses Barres de Almeida, Sargis Gasparyan, Paolo Giommi, Narek Sahakyan   +4 more
doaj   +1 more source

Polarized blazar X-rays imply particle acceleration in shocks. [PDF]

Nature, 2022
Liodakis I, Marscher AP, Agudo I, Berdyugin AV, Bernardos MI, Bonnoli G, Borman GA, Casadio C, Casanova VC, Cavazzuti E, Rodriguez Cavero N, Di Gesu L, Di Lalla N, Donnarumma I, Ehlert SR, Errando M, Escudero J, Garcı A-Comas M, Agı S-González B, Husillos C, Jormanainen J, Jorstad SG, Kagitani M, Kopatskaya EN, Kravtsov V, Krawczynski H, Lindfors E, Larionova EG, Madejski GM, Marin F, Marchini A, Marshall HL, Morozova DA, Massaro F, Masiero JR, Mawet D, Middei R, Millar-Blanchaer MA, Myserlis I, Negro M, Nilsson K, O'Dell SL, Omodei N, Pacciani L, Paggi A, Panopoulou GV, Peirson AL, Perri M, Petrucci PO, Poutanen J, Puccetti S, Romani RW, Sakanoi T, Savchenko SS, Sota A, Tavecchio F, Tinyanont S, Vasilyev AA, Weaver ZR, Zhovtan AV, Antonelli LA, Bachetti M, Baldini L, Baumgartner WH, Bellazzini R, Bianchi S, Bongiorno SD, Bonino R, Brez A, Bucciantini N, Capitanio F, Castellano S, Ciprini S, Costa E, De Rosa A, Del Monte E, Di Marco A, Doroshenko V, Dovčiak M, Enoto T, Evangelista Y, Fabiani S, Ferrazzoli R, Garcia JA, Gunji S, Hayashida K, Heyl J, Iwakiri W, Karas V, Kitaguchi T, Kolodziejczak JJ, La Monaca F, Latronico L, Maldera S, Manfreda A, Marinucci A, Matt G, Mitsuishi I, Mizuno T, Muleri F, Ng SC, Oppedisano C, Papitto A, Pavlov GG, Pesce-Rollins M, Pilia M, Possenti A, Ramsey BD, Rankin J, Ratheesh A, Sgró C, Slane P, Soffitta P, Spandre G, Tamagawa T, Taverna R, Tawara Y, Tennant AF, Thomas NE, Tombesi F, Trois A, Tsygankov S, Turolla R, Vink J, Weisskopf MC, Wu K, Xie F, Zane S.   +127 more
europepmc   +1 more source

Correlated Short-Timescale Hard-Soft X-ray Variability of the Blazars Mrk 421 and 1ES 1959+650 using $\textit{AstroSat}$

, 2023
Susmita Das, Ritaban Chatterjee
openalex   +1 more source

An Optical View of Extragalactic γ-Ray Emitters

Frontiers in Astronomy and Space Sciences, 2017
The Fermi Gamma-ray Observatory discovered about a thousand extragalactic sources emitting energy from 100 MeV to 100 GeV. The majority of these sources belong to the class of blazars characterized by a quasi-featureless optical spectrum (BL Lac Objects).
Simona Paiano, Simona Paiano, Renato Falomo, Marco Landoni, Aldo Treves, Riccardo Scarpa, Riccardo Scarpa   +6 more
doaj   +1 more source

Bioinformation and Neutrino Communication. [PDF]

Bioinformation, 2022
Shapshak P.
europepmc   +1 more source

DISTRIBUTIONS OF GAMMA-RAY BURSTS AND BLAZARS IN THEL_p-E_p-PLANE AND POSSIBLE IMPLICATIONS FOR THEIR RADIATION PHYSICS [PDF]

, 2014
Fen Lyu, En-Wei Liang, Yun-Feng Liang, Xue-Feng Wu, Jin Zhang, X. N. Sun, Rui-Jing Lu, Bing Zhang   +7 more
openalex   +1 more source

PKS J0805-0111: A Second Owens Valley Radio Observatory Blazar Showing Highly Significant Sinusoidal Radio Variability—The Tip of the Iceberg

The Astrophysical Journal
Owens Valley Radio Observatory observations of the supermassive black hole binary (SMBHB) candidate PKS 2131−021 revealed, for the first time, six likely characteristics of the phenomenology exhibited by SMBHBs in blazars, of which the most unexpected ...
P. V. de la Parra, S. Kiehlmann, P. Mróz, A. C. S. Readhead, A. Synani, M. C. Begelman, R. D. Blandford, Y. Ding, F. Harrison, I. Liodakis, W. Max-Moerbeck, V. Pavlidou, R. Reeves, M. Vallisneri, M. F. Aller, M. J. Graham, T. Hovatta, C. R. Lawrence, T. J. W. Lazio, A. A. Mahabal, B. Molina, S. O’Neill, T. J. Pearson, V. Ravi, K. Tassis, J. A. Zensus   +25 more
doaj   +1 more source

Modeling Blazar Broadband Emission with a Convolutional Neural Network. I. Synchrotron Self-Compton Model

The Astrophysical Journal
Modeling the multiwavelength spectral energy distributions (SEDs) of blazars provides key insights into the underlying physical processes responsible for the emission.
D. Bégué, N. Sahakyan, H. Dereli-Bégué, P. Giommi, S. Gasparyan, M. Khachatryan, A. Casotto, A. Pe’er   +7 more
doaj   +1 more source

Neutrino Detection Rates from Lepto-hadronic Model Simulations of Bright Blazar Flares

The Astrophysical Journal
There is mounting evidence that blazars are the sources of part of the very-high-energy astrophysical neutrino flux detected by IceCube. In particular, there have been several spatial and temporal coincidences of individual IceCube neutrino events with ...
Joshua Robinson, Markus Böttcher
doaj   +1 more source

From Equipartition to Curvature: The Spectral Evolution of 4FGL Blazars

The Astrophysical Journal Supplement Series
We investigate the evolution of spectral energy distribution (SED) and underlying electron energy distribution (EED) by modeling the nearly simultaneous broadband spectra of selected bright 4FGL blazars, in the context of a combined cooling and ...
Muhammad S. Anjum, Shu-Jin Hou, Liang Chen, Zhigang Li, Minfeng Gu   +4 more
doaj   +1 more source