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A survey of unidentified egret sources at very high energies
(IOP Publishing, 2005-05-10)
The Whipple Observatory 10 m γ-ray telescope has been used to survey the error boxes of EGRET unidentified sources in an attempt to find counterparts at energies of 350 GeV and above. Twenty-one unidentified sources ...
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 ...
Discovery of very high energy gamma-ray radiation from the bl lac 1es 0806+524
(IOP Publishing, 2008-12-19)
The high-frequency-peaked BL Lacertae object 1ES 0806+524, at redshift z = 0.138, was observed in the very high energy (VHE) gamma-ray regime by VERITAS between 2006 November and 2008 April. These data encompass the two- ...
Observation of extended very high energy emission from the supernova remnant ic 443 with veritas
(IOP Publishing, 2009-06-01)
We present evidence that the very high energy (VHE, E > 100 GeV) gamma-ray emission coincident with the supernova remnant IC 443 is extended. IC 443 contains one of the best studied sites of supernova remnant/molecular ...
Veritas observations of a very high energy γ-ray flare from the blazar 3c 66a
(IOP Publishing, 2009-02-18)
The intermediate-frequency peaked BL Lacertae (IBL) object 3C 66A is detected during 2007-2008 in VHE ( very high energy; E > 100 GeV) gamma rays with the VERITAS stereoscopic array of imaging atmospheric Cherenkov ...
Detection of extended vhe gamma ray emission from g106.3+2.7 with veritas
(IOP Publishing, 2009-08-25)
We report the detection of very-high-energy (VHE) gamma-ray emission from supernova remnant (SNR) G106.3+2.7. Observations performed in 2008 with the VERITAS atmospheric Cherenkov gamma-ray telescope resolve extended ...
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 ...
Veritas observations of the γ‐ray binary ls i +61 303
(IOP Publishing, 2008-06-01)
LS I +61 303 is one of only a few high-mass X-ray binaries currently detected at high significance in very high energy gamma-rays. The system was observed over several orbital cycles ( between 2006 September and 2007 ...
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, ...
Veritas observations of the bl lac object 1es 1218+304
(IOP Publishing, 2009-04-07)
The VERITAS collaboration reports the detection of very-high-energy gamma-ray emission from the high-frequency-peaked BL Lac object 1ES 1218+304 located at a redshift of z = 0.182. A gamma-ray signal was detected with a ...