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Whipple 10m Telescope and Blazar Lightcurves
The Whipple collaboration pioneered the Imaging Atmospheric Cherenkov Technique (IACT) for the detection of Very High Energy (VHE) gamma rays. The Whipple 10 m gamma-ray telescope was located at the Fred Lawrence Whipple Observatory in Southern Arizona in the United States. The predecessor to VERITAS (Very Energetic Radiation Imaging Telescope Array System), this telescope was in operation from...
متن کاملمشاهده سایه خورشید با تلسکوپ ردیاب پرتوهای کیهانی
A cosmic ray tracking telescope has been made for the measurement of cosmic rays from different directions, especially those received from the sun direction. Our observations by the telescope shows a noticeable deficiency in the detected number of cosmic rays entering the telescope when its axis was pointing to the sun compared to that entering the telescope with no sun in its field of view. Th...
متن کاملLarge zenith - angle observations with the CAT Cherenkov imaging telescope
We present here results from large zenith-angle observations with the CAT atmospheric Cherenkov imaging telescope, based on data taken on the Crab Nebula and on the blazar Mk501 from 1996 onwards. From Monte Carlo simulations, the threshold energy of the telescope is expected to vary from about 250 GeV at zenith to about 2 TeV at a zenith angle of 60 •. The lower source-fluxes due to the increa...
متن کاملObservation of VHE γ-rays from Cassiopeia A with the MAGIC telescope
Aims. We searched for very high energy (VHE) γ-ray emission from the supernova remnant Cassiopeia A Methods. The shell-type supernova remnant Cassiopeia A was observed with the 17 meter MAGIC telescope between July 2006 and January 2007 for a total time of 47 hours. Results. The source was detected above an energy of 250 GeV with a significance of 5.2 σ and a photon flux above 1 TeV of (7.3±0.7...
متن کاملHubble Space Telescope STIS Observations of the Accreting White Dwarfs in BWScl, BCUMa and SWUMa
We have observed the short-period dwarf novae BWScl, BCUMa and SWUMa using the Hubble Space Telescope/Space Telescope Imaging Spectrograph. In all three systems, the white dwarf is the dominant source of farultraviolet flux, even though in BCUMa and SWUMa an additional continuum component contributes ∼ 10% and ∼ 20% of the 1400 Å flux, respectively. Fitting the data with detailed white dwarf mo...
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