Showing 161 - 180 results of 520 for search '"blazar"', query time: 0.13s Refine Results
  1. 161

    Mining the Herschel-Astrophysical Terahertz Large Area Survey: submillimetre-selected blazars in equatorial fields by Lopez-Caniego, M, Gonzalez-Nuevo, J, Massardi, M, Bonavera, L, Herranz, D, Negrello, M, De Zotti, G, Carrera, F, Danese, L, Fleuren, S, Hardcastle, M, Jarvis, M, Kloeckner, H, Mauch, T, Procopio, P, Righini, S, Sutherland, W, Auld, R, Baes, M, Buttiglione, S, Clark, C, Cooray, A, Dariush, A, Dunne, L, Dye, S

    Published 2013
    “…We found that 379 of the H-ATLAS sources have a FIRST counterpart within 10 arcsec, including eight catalogued blazars (plus one known blazar that was found at the edge of one of the H-ATLAS maps). …”
    Journal article
  2. 162
  3. 163

    X-ray Flux and Spectral Variability of the TeV Blazars Mrk 421 and PKS 2155-304 by Alok C. Gupta

    Published 2020-09-01
    “…We reviewed X-ray flux and spectral variability properties studied to date by various X-ray satellites for Mrk 421 and PKS 2155-304, which are TeV emitting blazars. Mrk 421 and PKS 2155-304 are the most X-ray luminous blazars in the northern and southern hemispheres, respectively. …”
    Get full text
    Article
  4. 164

    3 mm GMVA Observations of Total and Polarized Emission from Blazar and Radio Galaxy Core Regions by Carolina Casadio, Thomas P. Krichbaum, Alan P. Marscher, Svetlana G. Jorstad, José L. Gómez, Iván Agudo, Uwe Bach, Jae-Young Kim, Jeffrey A. Hodgson, Anton J. Zensus

    Published 2017-10-01
    “…We present total and linearly polarized 3 mm Global mm-VLBI Array (GMVA; mm-VLBI: Very Long Baseline Interferometry observations at millimetre wavelengths) images of a sample of blazars and radio galaxies from the VLBA-BU-BLAZAR 7 mm monitoring program designed to probe the innermost regions of active galactic nuclei (AGN) jets and locate the sites of gamma-ray emission observed by the Fermi-LAT. …”
    Get full text
    Article
  5. 165

    Modeling Blazar Broadband Emission with a Convolutional Neural Network. I. Synchrotron Self-Compton Model by D. Bégué, N. Sahakyan, H. Dereli-Bégué, P. Giommi, S. Gasparyan, M. Khachatryan, A. Casotto, A. Pe’er

    Published 2024-01-01
    “…Modeling the multiwavelength spectral energy distributions (SEDs) of blazars provides key insights into the underlying physical processes responsible for the emission. …”
    Get full text
    Article
  6. 166
  7. 167

    Very High-energy (>50 GeV) Gamma-Ray Flux Variability of Bright Fermi Blazars by Vaidehi S. Paliya

    Published 2024-01-01
    “…This paper reports the results obtained from the 0.05−2 TeV Fermi-LAT data analysis of a sample of 29 blazars with the primary objective to explore their months-to-year-long very high-energy (VHE) flux variability behavior. …”
    Get full text
    Article
  8. 168
  9. 169
  10. 170
  11. 171
  12. 172

    Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A by Arguelles Delgado, Carlos A, Axani, Spencer Nicholas, Collin, G. H., Conrad, Janet Marie, Moulai, Marjon H., IceCube Collaboration

    Published 2021
    “…This observation of a neutrino in spatial coincidence with a g-ray-emitting blazar during an active phase suggests that blazars may be a source of high-energy neutrinos.…”
    Get full text
    Article
  13. 173

    Synchrotron and inverse-Compton emission from blazar jets - I. A uniform conical jet model by Potter, W, Cotter, G

    Published 2012
    “…In the first of a series of papers investigating emission from blazar jets from radio to high-energy γ-rays, we revisit the class of models where the jet has a uniform conical ballistic structure. …”
    Journal article
  14. 174

    Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A by IceCube Collaboration, Fermi-LAT, MAGIC, AGILE, ASAS-SN, HAWC, H.E.S.S., INTEGRAL, Kanata, Kiso, Kapteyn, Liverpool Telescope, Subaru, Swift/NuSTAR, VERITAS, VLA/17B-403 teams, Sarkar, S

    Published 2018
    “…Blazars are among the most powerful objects in the Universe and are widely speculated to be sources of high-energy cosmic rays. …”
    Journal article
  15. 175
  16. 176
  17. 177

    PKS 2155-304: A Case Study of Blazar Variability Power Spectrum at the Highest Energies and on the Longest Timescales by Arti Goyal

    Published 2019-08-01
    “…The source is unique for exhibiting the shortest flux-doubling timescale at Very High Energy (VHE) among its class and thus provides a rare opportunity to study the particle acceleration on the smallest spatial scales in blazar jets. The light curves are modeled in terms of the Continuous-Time Auto-Regressive Moving Average (CARMA) process. …”
    Get full text
    Article
  18. 178

    <i>γ</i>-ray Flux and Spectral Variability of Blazar Ton 599 during Its 2021 Flare by Bhoomika Rajput, Ashwani Pandey

    Published 2021-12-01
    “…Blazars are known to emit exceptionally variable non-thermal emission over the wide range (from radio to <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>γ</mi></semantics></math></inline-formula>-rays) of electromagnetic spectrum. …”
    Get full text
    Article
  19. 179

    Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert by Arguelles Delgado, Carlos A, Axani, Spencer Nicholas, Collin, G. H., Conrad, Janet Marie, Moulai, Marjon H., IceCube Collaboration

    Published 2021
    “…A high-energy neutrino event detected by IceCube on 22 September 2017 was coincident in direction and time with a gamma-ray flare from the blazar TXS 0506+056. Prompted by this association, we investigated 9.5 years of IceCube neutrino observations to search for excess emission at the position of the blazar. …”
    Get full text
    Article
  20. 180

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

    Published 2021
    “…We find one additional known gamma-ray source, the blazar GB6 J1040+0617, in spatial coincidence with a neutrino in this sample. …”
    Get full text
    Article