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We present the detection of nearby BL Lacertae object PKS 2155-304 with the CANGAROO-III imaging atmospheric Cherenkov telescope system. This observation was triggered by the H.E.S.S. report in July 2006 that the outburst at TeV gamma-ray energy range occured on this object. Observations have been performed between 2006 July 28 and August 2. A signal from(More)
We report on the detection of very-high energy (VHE, E > 100 GeV) γ-ray emission from NGC 1275, the central radio galaxy of the Perseus cluster of galaxies. The source has been detected by the MAGIC telescopes with a statistical significance of 6.6 σ above 100 GeV in 46 hr of stereo observations carried out between August 2010 and February 2011. The(More)
We have observed the blazar PKS 2155-304 between 2006 July 28 to August 2 and between August 17 to 25 with the CANGAROO-III imaging atmospheric Cherenkov telescope in South Australia, which was triggered by the alert from the H.E.S.S. that the strong outburst of TeV gamma-ray emission was detected. The flux variation of very high energy gamma-rays was(More)
We use 73 h of stereoscopic data taken with the MAGIC telescopes to investigate the very high-energy (VHE) gamma-ray emission of the Crab pulsar. Our data show a highly significant pulsed signal in the energy range from 50 to 400 GeV in both the main pulse (P1) and the interpulse (P2) phase regions. We provide the widest spectra to date of the VHE(More)
In 2004, we searched for very high energy (VHE) gamma-ray emission from the Galactic Plane using the CANGAROO-III stereoscopic observation system. Two different longitude regions (= −19 • .5 and = +13 • .0) on the Galactic Plane were observed during July and August 2004. We analyzed events that triggered three telescopes aiming to measure the diffuse(More)
Context. The radio galaxy IC 310 has recently been identified as a γ-ray emitter based on observations at GeV energies with Fermi-LAT and at very high energies (VHE, E>100 GeV) with the MAGIC telescopes. Originally classified as a head-tail radio galaxy, the nature of this object is subject of controversy since its nucleus shows blazar-like behavior. Aims.(More)
The H.E.S.S. collaboration has reported the detection of the gamma-ray emission from eight new sources located in the Galactic Plane. HESS J1804-216 is one of the brightest, and its size and photon index suggest it as one of the largest and softest sources. We observed HESS J1804-216 with CANGAROO-III telescopes from May to July in 2006. We detected(More)
Supermassive black holes with masses of millions to billions of solar masses are commonly found in the centers of galaxies. Astronomers seek to image jet formation using radio interferometry but still suffer from insufficient angular resolution. An alternative method to resolve small structures is to measure the time variability of their emission. Here we(More)
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