Journal article
OBSERVATIONS OF THE SHELL-TYPE SUPERNOVA REMNANT CASSIOPEIA A AT TeV ENERGIES WITH VERITAS
The Astrophysical journal, Vol.714(1), pp.163-169
2010
DOI: 10.1088/0004-637X/714/1/163
Abstract
We report on observations of very high energy γ rays from the shell-type supernova remnant (SNR) Cassiopeia A with the Very Energetic Radiation Imaging Telescope Array System stereoscopic array of four imaging atmospheric Cherenkov telescopes in Arizona. The total exposure time for these observations is 22 hr, accumulated between September and November of 2007. The γ-ray source associated with the SNR Cassiopeia A was detected above 200 GeV with a statistical significance of 8.3σ. The estimated integral flux for this γ-ray source is about 3% of the Crab-Nebula flux. The photon spectrum is compatible with a power law dN/dE ∝ E−Γ with an index Γ = 2.61 ± 0.24stat ± 0.2sys. The data are consistent with a point-like source. We provide a detailed description of the analysis results and discuss physical mechanisms that may be responsible for the observed γ-ray emission.
Details
- Title: Subtitle
- OBSERVATIONS OF THE SHELL-TYPE SUPERNOVA REMNANT CASSIOPEIA A AT TeV ENERGIES WITH VERITAS
- Creators
- V. A Acciari - Harvard UniversityE Aliu - University of DelawareV Bugaev - Washington University in St. LouisY Butt - Harvard UniversityK Byrum - Argonne National LaboratoryA Cannon - University College DublinA Cesarini - Ollscoil na Gaillimhe – University of GalwayY. C Chow - University of California, Los AngelesL Crupik - Adler PlanetariumP Cogan - McGill UniversityW Cui - Purdue University West LafayetteR Dickherber - Washington University in St. LouisT Arlen - University of California, Los AngelesC Duke - Grinnell CollegeT Ergin - Harvard UniversityS. J Fegan - École PolytechniqueJ. P Finley - Purdue University West LafayetteG Finnegan - University of UtahP Fortin - Columbia UniversityL Fortson - Adler PlanetariumA Furniss - University of California, Santa CruzN Galante - Harvard UniversityD Gall - Purdue University West LafayetteT Aune - University of California, Santa CruzG. H Gillanders - Ollscoil na Gaillimhe – University of GalwayJ Grube - University College DublinR Guenette - McGill UniversityG Gyuk - Adler PlanetariumD Hanna - McGill UniversityJ Holder - University of DelawareD Huang - Pittsburg State UniversityC. M Hui - University of UtahT. B Humensky - University of ChicagoP Kaaret - University of IowaM Bautista - McGill UniversityN Karlsson - Adler PlanetariumM Kertzman - DePauw UniversityD Kieda - University of UtahA Konopelko - Pittsburg State UniversityH Krawczynski - Washington University in St. LouisF Krennrich - Iowa State UniversityM. J Lang - Ollscoil na Gaillimhe – University of GalwayS Lebohec - University of UtahG Maier - McGill UniversityS Mcarthur - Washington University in St. LouisM Beilicke - Washington University in St. LouisA Mccann - McGill UniversityM Mccutcheon - McGill UniversityJ Millis - Purdue University West LafayetteP Moriarty - Galway-Mayo Institute of TechnologyR. A Ong - University of California, Los AngelesD Pandel - University of IowaJ. S Perkins - Harvard UniversityM Pohl - University of PotsdamJ Quinn - University College DublinK Ragan - McGill UniversityW Benbow - Harvard UniversityD Boltuch - University of DelawareS. M Bradbury - University of LeedsJ. H Buckley - Washington University in St. Louis
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.714(1), pp.163-169
- DOI
- 10.1088/0004-637X/714/1/163
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Publisher
- Institute of Physics (IOP)
- Language
- English
- Date published
- 2010
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984200038502771
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