Showing 421 - 440 results of 520 for search '"blazar"', query time: 0.26s Refine Results
  1. 421

    Gamma-Ray and Neutrino Emissions from Starforming and Starburst Galaxies by Ambrosone Antonio, Chianese Marco, Fiorillo Damiano F.G., Marinelli Antonio, Miele Gennaro

    Published 2023-01-01
    “…Strikingly, SFGs and SBGs can explain 25% (up to 40%) of the diffuse High-Energy Starting Events (HESE) data, without overshooting the gamma-ray limits regarding non-blazar sources.…”
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    Article
  2. 422

    A Panchromatic View of Relativistic Jets in Narrow-Line Seyfert 1 Galaxies by Filippo D’Ammando, Monica Orienti, Justin Finke, Josefin Larsson, Marcello Giroletti, Claudia M. Raiteri

    Published 2016-08-01
    “…In addition we discuss the radio-to-very-high-energy properties of the γ-ray emitting NLSy1, their host galaxy, and black hole mass in the context of the blazar scenario and the unification of relativistic jets at different scales.…”
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    Article
  3. 423

    Deviations from normal distributions in artificial and real time series: a false positive prescription by Morris, P, Chakraborty, N, Cotter, G

    Published 2019
    “…Using the Fermi LAT monthly light curve of the blazar PKS2155-304 as an example, we prescribe and calculate a false positive rate that indicates how likely the PDF is to be attributed an incorrect functional form. …”
    Journal article
  4. 424

    Variability in gamma-ray sources by Morris, P

    Published 2019
    “…</p> <p>One such class of objects which are highly variable in gamma-rays are blazars, which are known to be variable on $\sim$ minute timescales at TeV energies. …”
    Thesis
  5. 425

    A Lepton–Hadron Model for the Multi-Wavelength Emission from Extreme High-Frequency Peaked BL Lacertae 1ES 1218+304 by Wenjing Dong, Qian Dong, Yonggang Zheng

    Published 2023-12-01
    “…We develop a lepton–hadron model for the possible origin of hard very high energy (VHE) spectra from a distant blazar. The model includes synchrotron self-Compton (SSC) and hadronic components. …”
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    Article
  6. 426

    Pitch-angle Anisotropy Imprinted by Relativistic Magnetic Reconnection by Luca Comisso, Brian Jiang

    Published 2023-01-01
    “…Radiation emitted by nonthermal particles accelerated during relativistic magnetic reconnection is critical for understanding the nonthermal emission in a variety of astrophysical systems, including blazar jets, black hole coronae, pulsars, and magnetars. …”
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    Article
  7. 427

    Intra-Night Variability of OJ 287 with Long-Term Multiband Optical Monitoring by Wei Zeng, Qing-Jiang Zhao, Ze-Jun Jiang, Zhi-Hui Kong, Zhen Liu, Dong-Dong Wang, Xiong-Fei Geng, Shen-Bang Yang, Ben-Zhong Dai

    Published 2017-11-01
    “…We present long-term optical multi-band photometric monitoring of the blazar OJ 287 from 6 March 2010 to 3 April 2016, with high temporal resolution in the V R I -bands. …”
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    Article
  8. 428

    High-Energy Neutrino Astronomy—Baikal-GVD Neutrino Telescope in Lake Baikal by Jarosław Stasielak, Paweł Malecki, Dmitry Naumov, Vladimir Allakhverdian, Alexandra Karnakova, Konrad Kopański, Wojciech Noga, on behalf of the Baikal-GVD Collaboration

    Published 2021-02-01
    “…This may be exemplified by the recent discovery of the high-energy neutrino emissions from the <inline-formula><math display="inline"><semantics><mi>γ</mi></semantics></math></inline-formula>-ray loud blazar TXS 0506+056. Constraining astrophysical neutrino fluxes can also help to understand the long-standing mystery of the origin of the ultra-high energy cosmic rays. …”
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    Article
  9. 429

    Physical Conditions and Variability Processes in AGN Jets through Multi-Frequency Linear and Circular Radio Polarization Monitoring by Ioannis Myserlis, Emmanouil Angelakis, Alex Kraus, Lars Fuhrmann, Vassilis Karamanavis, J. Anton Zensus

    Published 2016-11-01
    “…The model was used to investigate the conditions needed to reproduce the observed polarization behavior for the blazar 3C 454.3, assuming that the observed variability is attributed to evolving internal shocks propagating downstream.…”
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    Article
  10. 430

    Exploring the Magnetic Field Configuration in BL Lac Using GMVA by Bindu Rani, Thomas Krichbaum, Jeff A. Hodgson, Shoko Koyama, Anton J. Zensus, Lars Fuhramnn, Alan Marscher, Svetlana Jorstad

    Published 2016-09-01
    “…To explore the the magnetic field configuration at the base of jets in blazars, we took advantage of the full polarization capabilities of the Global Millimeter VLBI Array (GMVA). …”
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    Article
  11. 431

    The IceCube Neutrino Observatory - Contributions to ICRC 2017 Part I: Searches for the Sources of Astrophysical Neutrinos by Aartsen, MG, Ackermann, M, Adams, J, Sarkar, S, IceCube Collaboration

    Published 2017
    “…<p>Papers on the searches for the sources of astrophysical neutrinos, submitted to the 35th International Cosmic Ray Conference (ICRC 2017, Busan, South Korea) by the IceCube Collaboration</p> <p>Contents</p> <p>1 - Searching for VHE gamma-ray emission associated with IceCube astrophysical neutrinos using FACT, H.E.S.S., MAGIC, and VERITAS</p> <p>2 - Search for point-like sources in the astrophysical muon neutrino flux with IceCube</p> <p>3 - Search for weak neutrino point sources using angular auto-correlation analyses in IceCube</p> <p>4 - All-sky search for correlations in the arrival directions of astrophysical neutrino candidates and ultrahigh-energy cosmic rays</p> <p>5 - Results of IceCube searches for neutrinos from blazars using seven years of through-going muon data</p> <p>6 - IceCube Search for Neutrinos from 1ES 1959+650: Completing the Picture</p> <p>7 - Using all-flavor and all-sky event selections by IceCube to search for neutrino emission from the Galactic plane</p> <p>8 - Constraints on diffuse neutrino emission from the Galactic Plane with 7 years of IceCube data</p> <p>9 - Search for extended sources of neutrino emission with 7 years of IceCube data</p> <p>10 - Search for a cumulative neutrino signal from blazar flares using IceCube data</p> <p>11 - Investigation of Obscured Flat Spectrum Radio AGN with the IceCube Neutrino Observatory</p> <p>12 - Realtime neutrino alerts and follow-up in IceCube</p> <p>13 - Search for High-Energy Neutrino Emission from Fast Radio Bursts</p> <p>14 - IceCube as a Neutrino Follow-up Observatory for Astronomical Transients</p>…”
    Conference item
  12. 432

    Black hole jets, accretion discs and dark energy by Potter, WJ

    Published 2013
    “…</p> <p>This model is able to reproduce the simultaneous multiwavelength spectra of all 38 Fermi blazars with redshifts in unprecendented detail across all wavelengths. …”
    Thesis
  13. 433

    Two-injection Scenario for the Hard X-Ray Excess Observed in Mrk 421 by Wen Hu, Da-Hai Yan, Qiang-Lin Hu

    Published 2023-01-01
    “…In the model, two populations of mono-energetic ultra-relativistic electrons are injected into the emission region, which is a magnetized plasmoid propagating along the blazar jet. We numerically calculate the emitting electron energy distribution by solving a kinetic equation that incorporates both shock acceleration and stochastic acceleration processes. …”
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  14. 434

    Model Spectrum of Ultrahigh-energy Cosmic Rays Accelerated in FR-I Radio Galaxy Jets by Jeongbhin Seo, Dongsu Ryu, Hyesung Kang

    Published 2024-01-01
    “…Among those, some exhibit blazar-like inner jets, while others display plume-like structures. …”
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  15. 435

    Test of the Weak Equivalence Principle using LIGO observations of GW150914 and Fermi observations of GBM transient 150914 by Molin Liu, Zonghua Zhao, Xiaohe You, Jianbo Lu, Lixin Xu

    Published 2017-07-01
    “…Compared with previous results for photons and neutrinos, our limits are five orders of magnitude stronger than those from PeV neutrinos in blazar flares, and seven orders stronger than those from MeV neutrinos in SN1987A. (3) The third is a comparison of GWs with different frequencies in the range [35 Hz, 250 Hz]. (4) The fourth is a comparison of EM waves with different energies in the range [1 keV, 10 MeV]. …”
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  16. 436

    DECIPHERING CONTRIBUTIONS TO THE EXTRAGALACTIC GAMMA-RAY BACKGROUND FROM 2 GeV TO 2 TeV by Lisanti, Mariangela, Mishra-Sharma, Siddharth, Necib, Lina, Safdi, Benjamin Ryan

    Published 2017
    “…We find that the EGB is dominated by PSs, likely blazars, in all seven energy sub-bins considered. …”
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  17. 437

    Unveiling the Emission and Variation Mechanism of Mrk 501: Using the Multi-Wavelength Data at Different Time Scale by Lizhi Liu, Yunguo Jiang, Junhao Deng, Zhaohao Chen, Chenli Ma

    Published 2024-03-01
    “…Variability study at multi-frequency provides us with rich information of the emission and variation mechanism for blazars. In this work, we present a comprehensive multi-frequency analysis of the high-synchrotron-peaked (HSP) blazar Mrk 501, using <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>γ</mi></semantics></math></inline-formula>-ray, X-ray, optical, optical polarization, and radio data. …”
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  18. 438

    A NuSTAR and Chandra Investigation of the Misaligned Outflow of PSR J1101–6101 and the Lighthouse Pulsar Wind Nebula by Noel Klingler, Jeremy Hare, Oleg Kargaltsev, George G. Pavlov, John Tomsick

    Published 2023-01-01
    “…Finally, we discuss the X-ray source 2CXO J110158.4–605649 = 2XMM J110158.5–605651 (a serendipitously observed blazar) and suggest it may be the X-ray counterpart to the GeV source 4FGL J1102.0–6054.…”
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  19. 439
  20. 440

    Superluminal Motion and Jet Parameters in the Gamma-ray-Emitting Narrow-Line Seyfert 1 Galaxy TXS 1206+549 by Bettina Kozák, Sándor Frey, Krisztina Éva Gabányi

    Published 2024-02-01
    “…We find no compelling evidence for a very closely aligned blazar-type jet. The parameters for TXS 1206+549 resemble those of radio-loud quasar jets with a moderate Lorentz factor (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>Γ</mo><mo>≈</mo><mn>4</mn></mrow></semantics></math></inline-formula>) and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>ϑ</mi><mo>≈</mo><msup><mn>24</mn><mo>∘</mo></msup></mrow></semantics></math></inline-formula> inclination to the line of sight.…”
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