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Now showing items 11-20 of 31
Multiwavelength observations of 1es 1959+650, 1 year after the strong outburst of 2002
(IOP Publishing, 2006-06-20)
In 2003 April-May, the blazar 1ES 1959+650 showed an increased level of X-ray activity. This prompted a multiwavelength observation campaign with the Whipple 10 m gamma-ray telescope, the Rossi X-Ray Timing Explorer, the ...
Dark matter constraints from a joint analysis of dwarf spheroidal galaxy observations with veritas
(American Physical Society (APS), 2017-04-05)
We present constraints on the annihilation cross section of weakly interacting massive particles dark matter based on the joint statistical analysis of four dwarf galaxies with VERITAS. These results are derived from an ...
Discovery of a new tev gamma-ray source: ver j0521+211
(IOP Publishing, 2013-09-27)
We report the detection of a new TeV gamma-ray source, VER J0521+211, based on observations made with the VERITAS imaging atmospheric Cherenkov Telescope Array. These observations were motivated by the discovery of a cluster ...
Rapid tev gamma-ray flaring of bl lacertae
(IOP Publishing, 2012-12-19)
We report on the detection of a very rapid TeV gamma-ray flare from BL Lacertae on 2011 June 28 with the Very Energetic Radiation Imaging Telescope Array System (VERITAS). The flaring activity was observed during a 34.6 ...
Deep broadband observations of the distant gamma-ray blazar pks 1424+240
(IOP Publishing, 2014-03-28)
We present deep VERITAS observations of the blazar PKS 1424+240, along with contemporaneous Fermi Large Area Telescope, Swift X-ray Telescope, and Swift UV Optical Telescope data between 2009 February 19 and 2013 June 8. ...
Veritas observations of the microquasar cygnus x-3
(IOP Publishing, 2013-12-03)
We report results from TeV gamma-ray observations of the microquasar Cygnus X-3. The observations were made with the Very Energetic Radiation Imaging Telescope Array System (VERITAS) over a time period from 2007 June 11 ...
Upper limits from five years of blazar observations with the veritas cherenkov telescopes
(American Astronomical Society, 2016-05-18)
Between the beginning of its full-scale scientific operations in 2007 and 2012, the VERITAS Cherenkov telescope array observed more than 130 blazars; of these, 26 were detected as very-high-energy (VHE; E > 100 GeV) ...
Multiwavelength observations of the previously unidentified blazar rx j0648.7+1516
(IOP Publishing, 2011-11-15)
We report on the VERITAS discovery of very high energy (VHE) gamma-ray emission above 200 GeV from the high-frequency-peaked BL Lac (HBL) object RX J0648.7+1516 (GB J0648+1516), associated with 1FGL J0648.8+1516. The photon ...
Radio imaging of the very-high-energy -ray emission region in the central engine of a radio galaxy
(American Association for the Advancement of Science (AAAS), 2009-07-02)
The accretion of matter onto a massive black hole is believed to feed the relativistic plasma jets found in many active galactic nuclei (AGN). Although some AGN accelerate particles to energies exceeding 10(12) electron ...
Simultaneous multiwavelength observations of markarian 421 during outburst
(IOP Publishing, 2009-08-26)
We report on the results of two coordinated multiwavelength campaigns that focused on the blazar Markarian 421 during its 2006 and 2008 outbursts. These campaigns obtained UV and X-ray data using the XMM-Newton satellite, ...