Add to ORKGThe nearby BL Lac Object 1ES1959+650 (z = 0.047) has been observed with the HEGRA System of imaging Cherenkov telescopes. Based upon a data set of 94 hrs taken in July 2000 until October 2001, a weak detection (5.4 sigma) has been obtained corresponding to a flux level of 8 % of the Crab flux above an energy threshold of 2 TeV for the observations at zenith angles between 37 and 45 degree. During recent observations from May until July 2002, the source has been observed to undergo strong outbursts at TeV and X-ray energies. The energy spectrum during the flare is hard and exhibits curvature, whereas during the low-state a power-law with a photon-index of 3.3 +- 0.7 describes well the data
9 pages, 4 figures, accepted for publication in A&A1ES 0414+009 (z = 0.287) is a distant high-freque...
The blazar 1ES 1959+650 was observed twice by BeppoSAX in September 2001 simultaneously with optical...
TeV γ-rays from the BL Lac object 1ES 1959+650 have been measured during the years 2000 and 2001 wit...
The BL Lac object 1ES1959+650 has been observed by the HEGRA Collaboration in the years 2000, 2001 a...
TeV γ-rays from the BL Lac object 1ES 1959+650 have been measured during the years 2000 and 2001 w...
The BL Lacertae object 1ES 1440+ 122 was observed in the energy range from 85 GeV to 30 TeV by the V...
The active galaxy BL Lac is the prototype of the so-called BL Lac objects. All AGN detected in the T...
We present the first strong detection of very high energy gamma-rays from the close (z=0.048) X-ray-...
We present the first strong detection of very high energy gamma-rays from the close (z=0.048) X-ray-...
1ES 1959+650 is a bright TeV high-frequency-peaked BL Lac object exhibiting interesting features lik...
Following the detection of strong TeV gamma-ray flares from the BL Lac object 1ES 1959+650 with the ...
The MAGIC Cherenkov telescope has observed very high energy (VHE) gamma-ray emission from the Active...
9 pages, 4 figures, accepted for publication in A&A1ES 0414+009 (z = 0.287) is a distant high-freque...
The blazar 1ES 1959+650 was observed twice by BeppoSAX in September 2001 simultaneously with optical...
TeV γ-rays from the BL Lac object 1ES 1959+650 have been measured during the years 2000 and 2001 wit...
The BL Lac object 1ES1959+650 has been observed by the HEGRA Collaboration in the years 2000, 2001 a...
TeV γ-rays from the BL Lac object 1ES 1959+650 have been measured during the years 2000 and 2001 w...
The BL Lacertae object 1ES 1440+ 122 was observed in the energy range from 85 GeV to 30 TeV by the V...
The active galaxy BL Lac is the prototype of the so-called BL Lac objects. All AGN detected in the T...
We present the first strong detection of very high energy gamma-rays from the close (z=0.048) X-ray-...
We present the first strong detection of very high energy gamma-rays from the close (z=0.048) X-ray-...
1ES 1959+650 is a bright TeV high-frequency-peaked BL Lac object exhibiting interesting features lik...
Following the detection of strong TeV gamma-ray flares from the BL Lac object 1ES 1959+650 with the ...
The MAGIC Cherenkov telescope has observed very high energy (VHE) gamma-ray emission from the Active...
9 pages, 4 figures, accepted for publication in A&A1ES 0414+009 (z = 0.287) is a distant high-freque...
The blazar 1ES 1959+650 was observed twice by BeppoSAX in September 2001 simultaneously with optical...
TeV γ-rays from the BL Lac object 1ES 1959+650 have been measured during the years 2000 and 2001 wit...