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Observations of the Crab Nebula with the Whipple 10m Telescope |
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Conference Proceedings
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Written by J. Grube for the VERITAS Collaboration
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Friday, 06 July 2007 |
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Contribution to the 30th International Cosmic Ray Conference, Merida, Mexico, July 2007 arXiv:0709.4300 Due to the strong and steady TeV gamma-ray emission from the Crab Nebula supernova remnant, its measured flux and energy spectrum can be used to verify the calibration and data reduction methods applied to IACT data acquired over many observing seasons. This gives us confidence in the results obtained on variable TeV sources observed over the same period and in relating the sensitivity of new instruments to historical datasets. Here we present the results of an analysis of 65.3 hours of good quality data taken on the Crab Nebula between October 2000 and March 2006 with the Whipple 10m telescope. The total exposure resulted in a 46 sigma signal with 11886 selected excess events. The energy spectrum was best fit by a power law of the form dN/dE = (3.19 +/- 0.07_stat) x 10^-11 (E/TeV)^(-2.64 +/- 0.03_stat) cm^-2/s/TeV in the energy range 0.49--8 TeV. The systematic uncertainty in the flux was estimated to be 30%, with a systematic error of 0.2 in the photon index. A reasonable agreement is shown for a fit to a constant flux over the 6 years. |
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Observations of the Unidentified TeV γ-Ray Source TeV J2032+4130 with the Whipple Observatory |
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Science Publications
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Written by Konopelko, A. et. al.
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Sunday, 01 April 2007 |
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The Astrophysical Journal, Volume 658, p. 1062 arXiv:astro-ph/0611730 Abstract: We report on observations of the sky region around the unidentified TeV γ-ray source (TeV J2032+4130) carried out with the Whipple Observatory 10 m atmospheric Cherenkov telescope for a total of 65.5 hrs between 2003 and 2005. The standard two-dimensional analysis developed by the Whipple collaboration for a stand-alone telescope reveals an excess in the field of view at a pre-trials significance level of 6.1σ. The measured position of this excess is α2000 = 20h 32m 27s , δ2000 = 41◦ 39 17. The estimated integral flux for this γ-ray source is about 8% of the Crab-Nebula flux. The data are consistent with a point-like source. Here we present a detailed description of the standard two-dimensional analysis tech- nique used for the analysis of data taken with the Whipple Observatory 10 m telescope and the results for the TeV J2032+4130 campaign. We include a short discussion of the physical mechanisms that may be responsible for the observed γ-ray emission, based on possible association with known astrophysical objects, in particular Cygnus OB2. |
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Last Updated ( Thursday, 11 September 2008 )
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Observations of the Active Galactic Nuleus Markarian 421 with the First Two VERITAS Telscopes |
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Theses and Dissertations
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Written by Scott Hughes
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Monday, 01 January 2007 |
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Observations of the Active Galactic Nuleus Markarian 421 with the First Two VERITAS Telscopes Scott Hughes Supervised by Henric Krawczynski Department of Physics, Washington University in St. Louis January 2007 |
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Last Updated ( Monday, 11 February 2008 )
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Nanosecond Sampling of Atmospheric Cherenkov Radiation Applied to TeV Gamma-Ray Observations |
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Theses and Dissertations
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Written by Peter Cogan
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Friday, 01 December 2006 |
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Nanosecond Sampling of Atmospheric Cherenkov Radiation Applied to TeV Gamma-Ray Observations of Blazars with VERITAS Peter Cogan Supervised by Dr. John Quinn School of Physics, University College Dublin December 2006 |
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Last Updated ( Monday, 11 February 2008 )
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VERITAS: Status and Performance |
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Conference Proceedings
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Written by J. Holder and the VERITAS Collaboration
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Tuesday, 21 November 2006 |
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Submitted to Proceedings of "Science with New Generation of High Energy Gamma-ray Experiments", Elba 2006 astro-ph/0611598 Abstract: VERITAS is an atmospheric Cherenkov telescope array sited in Tucson, Arizona. The array is nearing completion and consists of four, 12m diameter telescopes. The first telescope in the array has been operating since February 2005, while observations with the full array are expected to begin in January, 2007. We report here in some detail on the performance of the first VERITAS telescope, and briefly discuss the first stereo observations. |
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Last Updated ( Tuesday, 21 November 2006 )
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