相关论文: Simultaneous multi-wavelength campaign on PKS 2005…

HESS Observations and VLT Spectroscopy of PG 1553+113

AIMS: The properties of the very high energy (VHE; E>100 GeV) gamma-ray emission from the high-frequency peaked BL Lac PG 1553+113 are investigated. An attempt is made to measure the currently unknown redshift of this object. METHODS: VHE…

天体物理学 · 物理学 2011-02-11 HESS Collaboration , F. Aharonian

Extreme BL Lacs: probes for cosmology and UHECR candidates

High-energy observations of extreme BL Lac objects, such as 1ES0229+200 or 1ES 0347-121, recently focused interest both for blazar and jet physics and for the implication on the extragalactic background light and intergalactic magnetic…

高能天体物理现象 · 物理学 2015-12-17 F. Tavecchio , G. Bonnoli

Interpretation of blazar SEDs based on broad band quasi-simultaneous observations

We study the quasi-simultaneous Spectral Energy Distributions (SED) of 48 LBAS blazars, collected within three months of the Fermi LAT Bright AGN Sample (LBAS) data taking period, combining Fermi and Swift data with radio NIR-Optical and…

高能天体物理现象 · 物理学 2009-12-21 S. Raino' , E. Cavazzuti , S. Colafrancesco , P. Giommi , A. Tramacere , the Fermi-LAT Collaboration

Multiwavelength Observations of Strong Flares From the TeV-Blazar 1ES 1959+650

Following the detection of strong TeV gamma-ray flares from the BL Lac object 1ES 1959+650 with the Whipple 10 m Cherenkov telescope on May 16 and 17, 2002, we performed intensive Target of Opportunity (ToO) radio, optical, X-ray and TeV…

天体物理学 · 物理学 2008-11-26 H. Krawczynski , S. B. Hughes , D. Horan , F. Aharonian , M. F. Aller , H. Aller , P. Boltwood , J. Buckley , P. Coppi , G. Fossati , N. Goetting , J. Holder , D. Horns , O. M. Kurtanidze , A. P. Marscher , M. Nikolashvili , R. A. Remillard , A. Sadun , M. Schroeder

First NuSTAR Observations of Mrk 501 within a Radio to TeV Multi-Instrument Campaign

We report on simultaneous broadband observations of the TeV-emitting blazar Markarian 501 between 1 April and 10 August 2013, including the first detailed characterization of the synchrotron peak with Swift and NuSTAR. During the campaign,…

高能天体物理现象 · 物理学 2015-10-14 A. Furniss , K. Noda , S. Boggs , J. Chiang , F. Christensen , W. Craig , P . Giommi , C. Hailey , F. Harisson , G. Madejski , K. Nalewajko , M. Perri , D. Stern , M. Urry , F. Verrecchia , W. Zhang , M. L. Ahnen , S. Ansoldi , L. A. Antonelli , P. Antoranz , A. Babic , B. Banerjee , P. Bangale , U. Barres de Almeida , J. A. Barrio , J. Becerra Gonzalez , W. Bednarek , E. Bernardini , B. Biasuzzi , A. Biland , O. Blanch , S. Bonnefoy , G. Bonnoli , F. Borracci , T. Bretz , E. Carmona , A. Carosi , A. Chatterjee , R. Clavero , P. Colin , E. Colombo , J. L. Contreras , J. Cortina , S. Covino , P. Da Vela , F. Dazzi , A. De Angelis , G. De Caneva , B. De Lotto , E. de Ona Wilhelmi , C. Delgado Mendez , F. Di Pierro , D. Dominis Prester , D. Dorner , M. Doro , S. Einecke , D. Eisenacher Glawion , D. Elsaesser , A. Fernandez-Barral , D. Fidalgo , M. V. Fonseca , L. Font , K. Frantzen , C. Fruck , D. Galindo , R. J. Garcia Lopez , M. Garczarczyk , D. Garrido Terrats , M. Gaug , P. Giammaria , N. Godinovic , A. Gonzalez Munoz , D. Guberman , Y. Hanabata , M. Hayashida , J. Herrera , J. Hose , D. Hrupec , G. Hughes , W. Idec , H. Kellermann , K. Kodani , Y. Konno , H. Kubo , J. Kushida , A. La Barbera , D. Lelas , N. Lewandowska , E. Lindfors , S. Lombardi , F. Longo , M. Lopez , R. Lopez-Coto , A. Lopez-Oramas , E. Lorenz , P. Majumdar , M. Makariev , K. Mallot , G. Maneva , M. Manganaro , K. Mannheim , L. Maraschi , B. Marcote , M. Mariotti , M. Martinez , D. Mazin , U. Menzel , J. M. Miranda , R. Mirzoyan , A. Moralejo , D. Nakajima , V. Neustroev , A. Niedzwiecki , M. Nievas Rosillo , K. Nilsson , K. Nishijima , R. Orito , A. Overkemping , S. Paiano , J. Palacio , M. Palatiello , D. Paneque , R. Paoletti , J. M. Paredes , X. Paredes-Fortuny , M. Persic , J. Poutanen , P. G. Prada Moroni , E. Prandini , I. Puljak , R. Reinthal , W. Rhode , M. Ribo , J. Rico , J. Rodriguez Garcia , T. Saito , K. Saito , K. Satalecka , V. Scapin , C. Schultz , T. Schweizer , S. N. Shore , A. Sillanpaa , J. Sitarek , I. Snidaric , D. Sobczynska , A. Stamerra , T. Steinbring , M. Strzys , L. Takalo , H. Takami , F. Tavecchio , P. Temnikov , T. Terzic , D. Tescaro , M. Teshima , J. Thaele , D. F. Torres , T. Toyama , A. Treves , V. Verguilov , I. Vovk , M. Will , R. Zanin , A. Archer , W. Benbow , R. Bird , J. Biteau , V. Bugaev , J. V Cardenzana , M. Cerruti , X. Chen , L. Ciupik , M. P. Connolly , W. Cui , H. J. Dickinson , J. Dumm , J. D. Eisch , A. Falcone , Q. Feng , J. P. Finley , H. Fleischhack , P. Fortin , L. Fortson , L. Gerard , G. H. Gillanders , S. Griffin , S. T. Griffiths , J. Grube , G. Gyuk , N. Haakansson , J. Holder , T. B. Humensky , C. A. Johnson , P. Kaaret , M. Kertzman , D. Kieda , M. Krause , F. Krennrich , M. J. Lang , T. T. Y. Lin , G. Maier , S. McArthur , A. McCann , K. Meagher , P. Moriarty , R. Mukherjee , D. Nieto , A. O'Faolain de Bhroithe , R. A. Ong , N. Park , D. Petry , M. Pohl , A. Popkow , K. Ragan , G. Ratliff , L. C. Reyes , P. T. Reynolds , G. T. Richards , E. Roache , M. Santander , G. H. Sembroski , K. Shahinyan , D. Staszak , I. Telezhinsky , J. V. Tucci , J. Tyler , V. V. Vassiliev , S. P. Wakely , O. M. Weiner , A. Weinstein , A. Wilhelm , D. A. Williams , B. Zitzer , O. Vince L. Fuhrmann , E. Angelakis , V. Karamanavis , I. Myserlis , T. P. Krichbaum , J. A. Zensus , H. Ungerechts , A. Sievers , R. Bachev , M. Bottcher , W. P. Chen , G. Damljanovic , C. Eswaraiah , T. Guver , T. Hovatta , Z. Hughes , S. . I. Ibryamov , M. D. Joner , B. Jordan , S. G. Jorstad , M. Joshi , J. Kataoka , O. M. Kurtanidze , S. O. Kurtanidze , A. Lahteenmaki , G. Latev , H. C. Lin , V. M. Larionov , A. A. Mokrushina , D. A. Morozova , M. G. Nikolashvili , C. M. Raiteri , V. Ramakrishnan , A. C. R. Readhead , A. C. Sadun , L. A. Sigua , E. H. Semkov , A. Strigachev , J. Tammi , M. Tornikoski , Y. V. Troitskaya I. S. Troitsky , M. Villata

The blazar PKS 0528+134: new results from BeppoSAX observations

BeppoSAX observed 8 times the gamma-ray bright blazar PKS 0528+134 in Feb. and Mar. 1997, during a multiwavelength campaign involving EGRET, onboard CGRO, and ground based telescopes. The source was in its faintest X-ray state observed so…

天体物理学 · 物理学 2007-05-23 G. Ghisellini , L. Costamante , G. Tagliaferri , L. Maraschi , A. Celotti , G. Fossati , E. Pian , A. Comastri , G. De Francesco , L. Lanteri , C. M. Raiteri , G. Sobrito M. Villata , I. S. Glass , P. Grandi , P. Padovani , C. Perola , A. Treves

New Insights on Gamma-Ray Burst Radiation Mechanisms from Multiwavelength Observations

The study of high-energy gamma-ray emission from gamma-ray bursts (GRBs) involves complex synchrotron radiation and synchrotron self-Compton scattering (SSC) mechanisms with multiple parameters exhibiting a wide distribution. Recent…

高能天体物理现象 · 物理学 2024-12-25 Yu-Hua Yao , Fang-Sheng Min , Shi Chen , Yi-Qing Guo

VHE Gamma Rays from PKS 2155-304

The X-ray selected BL Lac PKS 2155-304 has been observed using the University of Durham Mark 6 very high energy gamma ray telescope during 1998. We find no evidence for TeV emission during these recent observations when the X-ray flux was…

天体物理学 · 物理学 2007-05-23 P. M. Chadwick , K. Lyons , T. J. L. McComb , K. J. Orford , J. L. Osborne , S. M. Rayner , S. E. Shaw , K. E. Turver

Synchrotron-Self Compton Spectral Evolution of PKS 2155-304

The high frequency peaked blazar PKS 2155-304 is one of the brightest and most intensively studied prototype of BL Lac objects. Gamma-rays from PKS 2155-304 have been detected from the MeV to TeV ranges. We computed a synchrotron…

天体物理学 · 物理学 2007-05-23 Stefano Ciprini , Gino Tosti

On the origin of the multi-GeV photons from the closest burst with intermediate luminosity: GRB 190829A

Very-high-energy (VHE) emission is usually interpreted in the synchrotron-self Compton (SSC) scenario, and expected from the low-redshift and high-luminosity gamma-ray bursts (GRBs), as GRB 180720B and GRB 190114C. Recently, VHE emission…

高能天体物理现象 · 物理学 2021-09-08 N. Fraija , P. Veres , P. Beniamini , A. Galvan-Gamez , B. D. Metzger , R. Barniol Duran , R. L. Becerra

Multiwavelength Observations of LS I +61 303 with VERITAS, Swift and RXTE

We present results from a long-term monitoring campaign on the TeV binary LSI +61 303 with VERITAS at energies above 500 GeV, and in the 2-10 keV hard X-ray bands with RXTE and Swift, sampling nine 26.5 day orbital cycles between September…

高能天体物理现象 · 物理学 2015-05-13 VERITAS Collaboration , V. A. Acciari , E. Aliu , T. Arlen , M. Bautista , M. Beilicke , W. Benbow , M. Bottcher , S. M. Bradbury , V. Bugaev , Y. Butt , Y. Butt , K. Byrum0 , A. Cannon , A. Cesarini , Y. C. Chow , L. Ciupik , P. Cogan , P. Colin , W. Cui , M. Daniel , R. Dickherber , T. Ergin , A. Falcone , S. J. Fegan , J. P. Finley , P. Fortin , L. Fortson , A. Furniss , D. Gall , G. H. Gillanders , J. Grube , R. Guenette , G. Gyuk , D. Hanna , E. Hays , J. Holder , D. Horan , C. M. Hui , T. B. Humensky , P. Kaaret , N. Karlsson , D. Kieda , J. Kildea , A. Konopelko , H. Krawczynski , F. Krennrich , M. J. Lang , S. LeBohec , G. Maier , A. McCann , M. McCutcheon , J. Millis , P. Moriarty , R. Mukherjee , T. Nagai , R. A. Ong , A. N. Otte , D. Pandel , J. S. Perkins , J. S. Perkins , M. Pohl , J. Quinn , K. Ragan , L. C. Reyes , P. T. Reynolds , E. Roache , H. J. Rose , M. Schroedter , G. H. Sembroski , A. W. Smith , D. Steele , M. Stroh , S. Swordy , M. Theiling , J. A. Toner , A. Varlotta , V. V. Vassiliev , R. G. Wagner , S. P. Wakely , J. E. Ward , T. C. Weekes , A. Weinsteiny , R. J. White , D. A. Williams , S. Wissely , M. Woody , B. Zitzer

High-energy observations of PSR B1259-63/LS 2883 through the 2014 periastron passage: connecting X-rays to the GeV flare

The binary system PSR B1259-63/LS 2883 is well sampled in radio, X-rays, and TeV gamma-rays, and shows orbital phase-dependent variability in these frequencies. The first detection of GeV gamma-rays from the system was made around the 2010…

高能天体物理现象 · 物理学 2015-06-23 P. H. T. Tam , K. L. Li , J. Takata , A. T. Okazaki , C. Y. Hui , A. K. H. Kong

X-ray Emission of Mkn 421: New Clues From Its Spectral Evolution. I. Temporal Analysis

Mkn 421 was repeatedly observed with BeppoSAX in 1997-1998. This is the first of two papers where we present the results of a thorough temporal and spectral analysis of all the data available to us, focusing in particular on the flare of…

天体物理学 · 物理学 2009-10-31 G. Fossati , A. Celotti , M. Chiaberge , Y. H. Zhang , L. Chiappetti , G. Ghisellini , L. Maraschi , F. Tavecchio , E. Pian , A. Treves

The missing GeV {\gamma}-ray binary: Searching for HESS J0632+057 with Fermi-LAT

The very high energy (VHE; >100 GeV) source HESS J0632+057 has been recently confirmed as a \gamma-ray binary, a subclass of the high mass X-ray binary (HMXB) population, through the detection of an orbital period of 321 days. We performed…

高能天体物理现象 · 物理学 2015-06-17 G. A. Caliandro , A. B. Hill , D. F. Torres , D. Hadasch , P. Ray , A. Abdo , J. W. T. Hessels , A. Ridolfi , A. Possenti , M. Burgay , N. Rea , P. H. T. Tam , R. Dubois , G. Dubus , T. Glanzman , T. Jogler

INTEGRAL observations of the blazar Mrk 421 in outburst (Results of a multi-wavelength campaign)

We report the results of a multi-wavelength campaign on the blazar Mrk 421 during outburst. We observed four strong flares at X-ray energies that were not seen at other wavelengths (partially because of missing data). From the fastest rise…

天体物理学 · 物理学 2009-11-13 G. G. Lichti , E. Bottacini , M. Ajello , P. Charlot , W. Collmar , A. Falcone , D. Horan , S. Huber , A. von Kienlin , A. Lähteenmäki , E. Lindfors , D. Morris , K. Nilsson , D. Petry , M. Rüger , A. Sillanpää , F. Spanier , M. Tornikoski

Extreme synchrotron blazars: the case of Mkn 501

BeppoSAX observations of Mkn501 in April 1997 (Pian et al. 1998), have revealed an extraordinary X-ray emission from this BL Lac object, during a phase of high activity at TeV energies, as monitored with the Whipple, HEGRA and CAT Cerenkov…

天体物理学 · 物理学 2015-06-24 G. Ghisellini

Broad-Band High-Energy Emission of the Gamma-ray Binary System LS 5039: Spectral and Temporal Features using NuSTAR and Fermi Observations

We report on detailed analysis of the hard X-ray and GeV gamma-ray spectra of LS 5039, one of the brightest gamma-ray binary system in the Galaxy. The NuSTAR observation covering its entire orbit in 2016 allowed us for the first time to…

高能天体物理现象 · 物理学 2021-10-20 Hiroki Yoneda , Dmitry Khangulyan , Teruaki Enoto , Kazuo Makishima , Kairi Mine , Tsunefumi Mizuno , Tadayuki Takahashi

Complex Spectral Variability from Intensive Multi-wavelength Monitoring of Mrk421 in 1998

We conducted a multi-frequency campaign for the TeV blazar Mrk~421 in 1998 April. The campaign started from a pronounced high amplitude flare recorded by SAX and Whipple; ASCA observation started three days later. In the X-ray data, we…

天体物理学 · 物理学 2009-10-31 T. Takahashi , J. Kataoka , G. Madejski , J. Mattox , C. M. Urry , S. Wagner , F. Aharonian , M. Catanese , L. Chiappetti , P. Coppi , B. Degrange , G. Fossati , H. Kubo , H. Krawczynski , F. Makino , H. Marshall , L. Maraschi , F. Piron , R. Remillard , F. Takahara , M. Tashiro , H. Terasranta , T. Weekes

X-ray spectral studies of TeV gamma-ray emitting blazars

This work is a summary of the X-ray spectral studies of 29 TeV $\gamma$-ray emitting blazars observed with Swift/XRT, especially focusing on sources for which X-ray regime allows to study the low and the high energy ends of the particle…

高能天体物理现象 · 物理学 2016-01-28 Alicja Wierzcholska , Stefan Wagner

Fermi LAT Observations of LS 5039

The first results from observations of the high mass X-ray binary LS 5039 using the Fermi Gamma-ray Space Telescope data between 2008 August and 2009 June are presented. Our results indicate variability that is consistent with the binary…

高能天体物理现象 · 物理学 2012-08-27 The Fermi LAT collaboration