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相关论文: An Updated Search of Steady TeV $\gamma-$Ray Point…

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We searched for TeV gamma-rays from the remnant of SN 1987A around 5400 days after the supernova. The observations were carried out in 2001, from November 16 to December 11, using the CANGAROO-II Imaging Atmospheric Cherenkov Telescope. In…

天体物理学 · 物理学 2009-11-07 R. Enomoto , L. T. Ksenofontov , H. Katagiri , K. Tsuchiya , CANGAROO-II collaboration

For distant extragalactic sources of gamma-rays in the PeV energy range, interactions of the gamma rays with intergalactic diffuse radiation fields will initiate a pair cascade. Depending on the magnetic fields in the vicinity of the…

天体物理学 · 物理学 2007-05-23 HEGRA Collaboration , F. Aharonian

We report the first detection of a TeV gamma-ray flux from the solar disk (6.3$\sigma$), based on 6.1 years of data from the High Altitude Water Cherenkov (HAWC) observatory. The 0.5--2.6 TeV spectrum is well fit by a power law, dN/dE = $A…

We propose to explore the so-far poorly measured cosmic ray and gamma-ray sky (accelerator sky) in the energy range from 10 TeV to 1 EeV. New physics questions might be addressed in this last remaining observation window of gamma-ray…

天体物理仪器与方法 · 物理学 2009-09-03 M. Tluczykont , T. Kneiske , D. Hampf , D. Horns

We report on TeV gamma-ray observations of the blazar Mrk 421 (redshift of 0.031) with the VERITAS observatory and the Whipple 10m Cherenkov telescope. The excellent sensitivity of VERITAS allowed us to sample the TeV gamma-ray fluxes and…

The Fermi bubbles are structures observed in gamma rays at GeV energies, emanating from the central region of our galaxy and extending up to 8.5 kpc above and below the galactic plane. While initial studies showed a flat brightness across…

高能天体物理现象 · 物理学 2021-08-02 Pooja Surajbali

Recent observations, particularly from the HESS Collaboration, have revealed rich Galactic populations of TeV gamma-ray sources, including a collection unseen in other wavelengths. Many of these gamma-ray spectra are well measured up to ~10…

天体物理学 · 物理学 2009-11-11 Matthew D. Kistler , John F. Beacom

We report the TeV gamma-ray observations of the nearby normal spiral galaxy NGC 253. At a distance of $\sim$2.5 Mpc, NGC 253 is one of the nearest starburst galaxies. This relative closeness, coupled with the high star formation rate in the…

天体物理学 · 物理学 2009-11-07 C. Itoh , R. Enomoto , S. Yanagita , T. Yoshida , CANGAROO-II collaboration

The discovery of extended TeV emission around the Geminga and PSR B0656+14 pulsars, with properties consistent with free particle propagation in the interstellar medium (ISM), has sparked considerable discussion on the possible presence of…

高能天体物理现象 · 物理学 2020-04-29 G. Giacinti , A. M. W. Mitchell , R. López-Coto , V. Joshi , R. D. Parsons , J. A. Hinton

Astrophysical sources outside the Milky Way, such as active galactic nuclei and star-forming galaxies, leave their imprint on the gamma-ray sky as nearly isotropic emission referred to as the Extragalactic Gamma-Ray Background (EGB). While…

高能天体物理现象 · 物理学 2017-01-12 Mariangela Lisanti , Siddharth Mishra-Sharma , Lina Necib , Benjamin R. Safdi

A survey of the northern hemisphere for astrophysical point sources with continuous emission of high-energy cosmic rays is presented. Around 47 Mio extensive air showers with primary energies above $\approx$ 300 TeV measured by the KASCADE…

天体物理学 · 物理学 2019-08-14 T. Antoni

Tibet AS-gamma collaboration has recently reported detection of gamma-rays with energies up to Peta-electronvolt from parts of the Galactic plane. We notice that the analysis of gamma-ray flux by the Tibet AS-gamma experiment also implies…

高能天体物理现象 · 物理学 2021-09-15 A. Neronov , D. Semikoz , Ie. Vovk

We present the results of a search for pulsed TeV emission from the Crab pulsar using the Whipple Observatory's 10 m gamma-ray telescope. The direction of the Crab pulsar was observed for a total of 73.4 hours between 1994 November and 1997…

The H.E.S.S. Galactic Plane Survey (HGPS), the first comprehensive survey of the inner Galaxy at TeV energies, has led to the discovery of an unexpectedly large and diverse population of over 60 sources of TeV gamma rays within its current…

高能天体物理现象 · 物理学 2019-08-14 S. Carrigan , F. Brun , R. C. G. Chaves , C. Deil , A. Donath , H. Gast , V. Marandon , M. Renaud

The TeV gamma ray sky is observable by recording footprints of extensive air showers with an array of particle detectors. In the northern hemisphere there are currently two projects employing this technique: The HAWC gamma ray observatory…

天体物理仪器与方法 · 物理学 2017-09-19 Harm Schoorlemmer , Rubén López-Coto , Jim Hinton

Gamma-ray observations have recently shifted the focus to higher and higher energies, with capable ground-based instruments enabling measurements in the TeV to PeV domain. While a clear prevalence of diffuse emission is observed in the GeV…

高能天体物理现象 · 物理学 2023-03-22 Kathrin Egberts , Constantin Steppa , Karol Pawel Peters

The High Altitude Water Cherenkov Gamma-Ray Observatory (HAWC) continuously detects TeV photons and particles within its large field-of-view, accumulating every day a deeper exposure of two thirds of the sky. We analyzed 1523~days of HAWC…

The detection of TeV gamma-rays from the blazar H 1426+428 at an integral flux level of (4 +- 2(stat) +- 1(syst)) 10^(-12) erg cm^(-2) s^(-1) above 1 TeV with the HEGRA imaging atmospheric Cherenkov telescope system is reported. H 1426+428…

天体物理学 · 物理学 2007-05-23 HEGRA Collaboration , F. Aharonian

We have made a multiwavelength study of the overlapping error boxes of the unidentified gamma-ray sources TeV J2032+4130 and 3EG J2033+4118 in the direction of the Cygnus OB2 association (d = 1.7 kpc) in order to search for a point-source…

天体物理学 · 物理学 2008-11-26 R. Mukherjee , J. P. Halpern , E. V. Gotthelf , M. Eracleous , N. Mirabal

This article reports the results of X-ray studies of the extended TeV $\gamma$-ray source VER J2019+368. Suzaku observations conducted to examine properties of the X-ray pulsar wind nebula (PWN) around PSR J2021+3651 revealed that the…

高能天体物理现象 · 物理学 2017-06-14 T. Mizuno , N. Tanaka , H. Takahashi , J. Katsuta , K. Hayashi , R. Yamazaki