VERITAS Upper Limit on the VHE Emission from the Radio Galaxy NGC 1275 (2009)
Aliu, E., Arlen, T., Aune, T., Bautista, M., Beilicke, M., ...
The recent detection by the Fermi gamma-ray space telescope of high-energy gamma-rays from the radio galaxy NGC 1275 makes the observation of the very high energy (VHE: E > 100 GeV) part of its...
A connection between star formation activity and cosmic rays in the starburst galaxy M 82 (2009)
Acciari, V. A., Aliu, E., Arlen, T., Aune, T., Bautista, M., Beilicke, M., ...
Although Galactic cosmic rays (protons and nuclei) are widely believed to be dominantly accelerated by the winds and supernovae of massive stars, definitive evidence of this origin remains elusive...
Multiwavelength observations of a TeV-Flare from W Comae (2009)
Aliu, E., Aune, T., Beilicke, M., Benbow, W., Bottcher, M., ...
We report results from an intensive multiwavelength campaign on the intermediate-frequency-peaked BL Lacertae object W Com (z=0.102) during a strong outburst of very high energy gamma-ray emission in...
MULTIWAVELENGTH OBSERVATIONS OF LS I+61 degrees 303 WITH VERITAS, SWIFT, AND RXTE (2009)
Acciari, V. A., Aliu, E., Arlen, T., Bautista, M., Beilicke, M., Benbow, W., ...
A first joint M87 campaign in 2008 from radio to TeV gamma-rays (2009)
Wagner, R. M., Beilicke, M., Davies, F., Krawczynski, H., Mazin, D., Raue, M., ...
M87, the central galaxy of the Virgo cluster, is the first radio galaxy detected in the TeV regime. The structure of its jet, which is not pointing toward the line of sight, is spatially resolved in...
Observation of Extended VHE Emission from the Supernova Remnant IC 443 with VERITAS (2009)
Aliu, E., Arlen, T., Aune, T., Bautista, M., Beilicke, M., ...
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...
Aliu, E., Arlen, T., Beilicke, M., Benbow, W., Boltuch, D., ...
HESS J0632+057 is one of only two unidentified very-high-energy gamma-ray sources which appear to be point-like within experimental resolution. It is possibly associated with the massive Be star MWC...
Multiwavelength Observations of LS I +61 303 with VERITAS, Swift and RXTE (2009)
Acciari, VERITAS Collaboration:V. A., Aliu, E., Arlen, T., Bautista, M., Beilicke, M., Benbow, W., ...
We present results from a long-term monitoring campaign on the TeV binary LSI +61 303 with VERITAS at energies above 500 GeV, and in the 2-10 keV hard X-ray bands with RXTE and Swift, sampling nine...
VERITAS OBSERVATIONS OF A VERY HIGH ENERGY gamma-RAY FLARE FROM THE BLAZAR 3C 66A (2009)
Acciari, V. A., Aliu, E., Arlen, T., Beilicke, M., Benbow, W., Bottcher, M., ...
VERITAS Observations of a Very High Energy Gamma-ray Flare from the Blazar 3C 66A (2009)
Aliu, E., Arlen, T., Beilicke, M., Benbow, W., Bottcher, M., ...
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...
VERITAS observations of the BL Lac 1ES 1218+304 (2009)
Aliu, E., Arlen, T., Beilicke, M., Benbow, W., Bradbury, S. M., ...
The VERITAS collaboration reports the detection of very-high-energy (VHE) 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...
Discovery of Very High Energy Gamma-Ray Radiation from the Bl Lac 1es 0806+524 (2009)
Acciari, V., Aliu, E., Arlen, T., Bautista, M., Beilicke, M., Benbow, W., ...
HX-POL - A Balloon-Borne Hard X-Ray Polarimeter (2008)
Krawczynski, H., Garson III, A., Li, Q., Beilicke, M., Dowkontt, P., Wulf, E., ...
We report on the design and estimated performance of a balloon-borne hard X-ray polarimeter called HX-POL. The experiment uses a combination of Si and Cadmium Zinc Telluride detectors to measure the...
Discovery of Very High-Energy Gamma-Ray Radiation from the BL Lac 1ES 0806+524 (2008)
Aliu, E., Arlen, T., Bautista, M., Beilicke, M., Benbow, W., ...
The high-frequency-peaked BL-Lacertae object \objectname{1ES 0806+524}, at redshift z=0.138, was observed in the very-high-energy (VHE) gamma-ray regime by VERITAS between November 2006 and April...
Krawczynski, H., Atoyan, A. M., Beilicke, M., Blandford, R., Boettcher, M., Buckley, J., ...
This is a report on the findings of the extragalactic science working group for the white paper on the status and future of TeV gamma-ray astronomy. The white paper was commissioned by the American...
Fabrication and Test of Pixelated CZT Detectors with Different Pixel Pitches and Thicknesses (2008)
Li, Q., Garson, A., Dowkontt, P., Martin, J., Beilicke, M., Jung, I., ...
The main methods grown Cadmium Zinc Telluride (CZT) crystals with high yield and excellent homogeneity are Modified Horizontal Bridgman (MHB) and High Pressure Bridgman (HPB) processes, respectively....
Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS (2008)
Acciari, V. A., Beilicke, M., Blaylock, G., Bradbury, S. M., Buckley, J. H., Bugaev, V., ...
The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to study in detail processes occurring in Active Galactic Nuclei from radio waves to TeV gamma-rays. Here...
the UK Particle Physics and Astronomy Research Spectroscopy (2008)
G. F. Bignami, P. A. Caraveo, R. C. Lamb, J. A. Paul, Astrophys J, C. Motch, ...
Conference, T.Kajita et al., Eds. (Universal Academy
Abstract Observation of the giant radio galaxy M87 (2008)
The giant radio galaxy M87, well studied from radio to X-ray energies, is located in the Virgo cluster of galaxies at a distance of 16 Mpc (redshift z 0:00436). M87 has been observed with the HEGRA...
Veritas observations of the gamma-ray binary LS I+61 303 (2008)
Acciari, V. A., Beilicke, M., Blaylock, G., Bradbury, S. M., Buckley, J. H., Bugaev, V., ...
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...
Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS (2008)
Acciari, V. A., Beilicke, M., Blaylock, G., Bradbury, S. M., Buckley, J. H., Bugaev, V., ...
The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to study in detail processes occurring in active galactic nuclei from radio waves to TeV gamma-rays. Here...
Acciari, V. A., Aliu, E., Beilicke, M., Benbow, W., Bottcher, M., Bradbury, S. M., ...
We report the detection of very high energy gamma- ray emission from the intermediate- frequency- peaked BL Lacertae object W Comae (z = 0.102) by VERITAS. The source was observed between 2008...
Exploring a SNR/molecular cloud association within HESS J1745-303 (2008)
Aharonian, F., Akhperjanian, A. G., De Almeida, U. B., Bazer-Bachi, A. R., Behera, B., Beilicke, M., ...
Discovery of VHE gamma-rays from the high-frequency-peaked BL lacertae object RGB J0152+017 (2008)
Aharonian, F., Akhperjanian, A. G., De Almeida, U. B., Bazer-Bachi, A. R., Behera, B., Beilicke, M., ...
HESS upper limits for Kepler's supernova remnant (2008)
Aharonian, F., Akhperjanian, A. G., De Almeida, U. B., Bazer-Bachi, A. R., Behera, B., Beilicke, M., ...
HESS observations and VLT spectroscopy of PG 1553+113 (2008)
Aharonian, F., Akhperjanian, A. G., De Almeida, U. B., Bazer-Bachi, A. R., Behera, B., Beilicke, M., ...
Upper limits from HESS active galactic nuclei observations in 2005-2007 (2008)
Aharonian, F., Akhperjanian, A. G., De Almeida, U. B., Bazer-Bachi, A. R., Behera, B., Beilicke, M., ...
Aharonian, F., Akhperjanian, A. G., De Almeida, U. B., Bazer-Bachi, A. R., Behera, B., Beilicke, M., ...
HESS very-high-energy gamma-ray sources without identified counterparts (2008)
Aharonian, F., Akhperjanian, A. G., De Almeida, U. B., Bazer-Bachi, A. R., Behera, B., Beilicke, M., ...
Chandra and HESS observations of the supernova remnant CTB 37B (2008)
Aharonian, F., Akhperjanian, A. G., De Almeida, U. B., Bazer-Bachi, A. R., Behera, B., Beilicke, M., ...
Discovery of a VHE gamma-ray source coincident with the supernova remnant CTB 37A (2008)
Aharonian, Felix, Akhperjanian, A. G., Barres De Almeida, U. B., Bazer-Bachi, A. R., Behera, B., Beilicke, M., ...
Aims. The supernova remnant (SNR) complex CTB 37 is an interesting candidate for observations with very high energy (VHE) -ray telescopes such as HESS. In this region, three SNRs are seen. One of...
Energy Spectrum of Cosmic-Ray Electrons at TeV Energies (2008)
Aharonian, F., Akhperjanian, A. G., De Almeida, U. B., Bazer-Bachi, A. R., Behera, B., Beilicke, M., ...
Aharonian, Felix, Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, Wystan, ...
We present deep H.E.S.S. observations of the supernova remnant (SNR) RX J1713.7-3946. Combining data of three years - from 2003 to 2005 - we obtain significantly increased statistics and energy...
Discovery of VHE $\gamma$-rays from the distant BL Lacertae 1ES 0347-121 (2007)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A.R., Behera, B., Beilicke, M., ...
Aims.Our aim is to study the production mechanism for very-high-energy (VHE; >100 GeV) ?-rays in distant active galactic nuclei (AGN) and use the observed VHE spectrum to derive limits on the...
Discovery of VHE $\gamma$-rays from the distant BL Lacertae 1ES 0347-121 (2007)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A.R., Behera, B., Beilicke, M., ...
Aims.Our aim is to study the production mechanism for very-high-energy (VHE; >100 GeV) ?-rays in distant active galactic nuclei (AGN) and use the observed VHE spectrum to derive limits on the...
Discovery of VHE gamma-rays from the distant BL Lacertae 1ES0347-121 (2007)
Aharonian, F., Akhperjanian, A. G., De Almeida, U. B., Bazer-Bachi, A. R., Behera, B., Beilicke, M., ...
New constraints on the mid-IR EBL from the HESS discovery of VHE gamma-rays from 1ES 0229+200 (2007)
Aharonian, F., Akhperjanian, A. G., De Almeida, U. B., Bazer-Bachi, A. R., Behera, B., Beilicke, M., ...
Discovery of two candidate pulsar wind nebulae in very-high-energy gamma rays (2007)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Behera, B., Beilicke, M., Benbow, W., ...
An exceptional very high energy gamma-ray flare of PKS 2155-304 (2007)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Behera, B., Beilicke, M., Benbow, W., ...
Discovery of a point-like very-high-energy gamma-ray source in Monoceros (2007)
Aharonian, F. A., Akhperjanian, A. G., Bazer-Bachi, A. R., Behera, B., Beilicke, M., Benbow, W., ...
Search for pulsed VHE gamma-ray emission from young pulsars with HESS (2007)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., ...
First ground-based measurement of atmospheric Cherenkov light from cosmic rays (2007)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., ...
Discovery of VHE $\gamma$-rays from the distant BL Lacertae 1ES 0347-121 (2007)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A.R., Behera, B., Beilicke, M., ...
Aims.Our aim is to study the production mechanism for very-high-energy (VHE; >100 GeV) ?-rays in distant active galactic nuclei (AGN) and use the observed VHE spectrum to derive limits on the...
H.E.S.S. discovers VHE gamma-rays from the BL Lac RGB J0152+017 (2007)
Nedbal, Dalibor, Benbow, Wystan, Costamante, Luigi, Giebels, Berrie, Kaufmann, Sarah, Raue, Martin, ...
We report on the H.E.S.S. discovery of VHE gamma-rays from the BL Lac object RGB J0152+017. H.E.S.S. observed the source from Oct 30 to Nov 14, 2007 for a total of ~14h live time. A preliminary...
Energy dependent $\gamma$-ray morphology in the pulsar wind nebula HESS J1825-137 (2006)
Aharonian, F., Akhperjanian, A.G., Bazer-Bachi, A.R., Beilicke, M., Benbow, W., Berge, D., ...
Aims. We present results from deep $\gamma$-ray observations of the Galactic pulsar wind nebula HESS J1825-137 performed with the HESS array. Methods. Detailed morphological and spatially resolved...
The H.E.S.S. survey of the Inner Galaxy in very-high-energy gamma-rays (2006)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., ...
We report on a survey of the inner part of the Galactic Plane in very high energy gamma-rays, with the H.E.S.S. Cherenkov telescope system. The Galactic Plane between +-30deg in longitude and +-3deg...
Discovery of very-high-energy gamma-rays from the Galactic Centre ridge (2006)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., ...
The source of Galactic cosmic rays (with energies up to 1015 eV) remains unclear, although it is widely believed that they originate in the shock waves of expanding supernova remnants1, 2. At present...
Evidence for VHE gamma-ray emission from the distant BL Lac PG 1553+113 (2006)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., ...
The high-frequency peaked BL Lac PG 1553+113 was observed in 2005 with the HESS stereoscopic array of imaging atmospheric-Cherenkov telescopes in Namibia. Using the HESS standard analysis, an excess...
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., ...
The Vela supernova remnant (SNR) is a complex region containing a number of sources of non-thermal radiation. The inner section of this SNR, within 2 degrees of the pulsar PSR B0833-45, has been...
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., ...
We present results from deep observations of the Galactic shell-type supernova remnant (SNR) RX J1713.7-3946 (also known as G347.3-0.5 ) conducted with the complete HESS array in 2004....
A low level of extragalactic background light as revealed by gamma-rays from blazars (2006)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., ...
The diffuse extragalactic background light consists of the sum of the starlight emitted by galaxies through the history of the Universe, and it could also have an important contribution from the...
Discovery of the two wings of the Kookaburra complex in VHE gamma-rays with H.E.S.S (2006)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., ...
Aims. Search for Very High Energy gamma-ray emission in the Kookaburra complex through observations with the H.E.S.S. array. Methods. Stereoscopic imaging of Cherenkov light emission of the gamma-ray...
Observations of the Crab nebula with HESS (2006)
Aharonian, Felix, Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, Wystan, ...
Context.The Crab nebula was observed with the HESS stereoscopic Cherenkov-telescope array between October 2003 and January 2005 for a total of 22.9 h (after data quality selection). This period of...
Fast Variability of Tera–Electron Volt gamma Rays from the Radio Galaxy M87 (2006)
Aharonian, Felix, Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, Wystan, ...
The detection of fast variations of the tera–electron volt (TeV) (1012 eV) gamma-ray flux, on time scales of days, from the nearby radio galaxy M87 is reported. These variations are about 10 times...
HESS Observations of the Galactic Center Region and Their Possible Dark Matter Interpretation (2006)
Aharonian, Felix, Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, Wystan, ...
The detection of gamma rays from the source HESS J1745-290 in the Galactic Center (GC) region with the High Energy Spectroscopic System (HESS) array of Cherenkov telescopes in 2004 is presented....
Energy dependent gamma-ray morphology in the Pulsar wind nebula HESS J1825-137 (2006)
Aharonian, Felix, Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, Wystan, ...
Detailed morphological and spatially resolved spectral studies reveal the very high-energy (VHE) gamma-ray aspects of this object with unprecedented precision. We confirm previous results obtained in...
Observations of 14 young open star clusters with the HEGRA system of Cherenkov telescopes (2006)
Aharonian, F., Akhperjanian, A., Beilicke, M., Bernlöhr, K., Bojahr, H., ...
Energy dependent $\gamma$-ray morphology in the pulsar wind nebula HESS J1825-137 (2006)
Aharonian, F., Akhperjanian, A.G., Bazer-Bachi, A.R., Beilicke, M., Benbow, W., Berge, D., ...
Aims. We present results from deep $\gamma$-ray observations of the Galactic pulsar wind nebula HESS J1825-137 performed with the HESS array. Methods. Detailed morphological and spatially resolved...
Energy dependent $\gamma$-ray morphology in the pulsar wind nebula HESS J1825-137 (2006)
Aharonian, F., Akhperjanian, A.G., Bazer-Bachi, A.R., Beilicke, M., Benbow, W., Berge, D., ...
Aims. We present results from deep $\gamma$-ray observations of the Galactic pulsar wind nebula HESS J1825-137 performed with the HESS array. Methods. Detailed morphological and spatially resolved...
Aharonian, Felix, Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, Wystan, Berge, David, ...
The extreme synchrotron BL Lac object H 2356-309, located at a redshift of z = 0.165, was observed from June to December 2004 with a total exposure of 40 h live-time with the HESS (High Energy...
Observations of the Crab nebula with HESS Astronomy Astrophysics (2006)
F. Aharonian, A. G. Akhperjanian, M. Beilicke, W. Benbow, D. Berge, ...
Context. The Crab nebula was observed with the HESS stereoscopic Cherenkov-telescope array between October 2003 and January 2005 for a total of 22.9 h (after data quality selection). This period of...
A New Population of Very High Energy Gamma-Ray Sources in the Milky Way (2005)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., ...
Very high energy -rays probe the long-standing mystery of the origin of cosmic rays. Produced in the interactions of accelerated particles in astrophysical objects, they can be used to image cosmic...
Discovery of VHE gamma ray from PKS 2005-489 (2005)
Aharonian, Felix, Akhperjanian, A.G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., ...
The high-frequency peaked BL Lac PKS 2005-489 (z=0.071) was observed in 2003 and 2004 with the HESS stereoscopic array of imaging atmospheric-Cherenkov telescopes in Namibia. A signal was detected at...
H.E.S.S. Observations of PKS 2155-304 (2005)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., ...
The high-frequency peaked BL Lac PKS 2155-304 at redshift z=0.117 has been detected with high significance (~45 ) at energies greater than 160 GeV, using the H.E.S.S. stereoscopic array of imaging...
Discovery of the Binary Pulsar PSR B1259-63 in VHE Gamma Rays (2005)
Schlenker, Stefan, Beilicke, M., Khélifi, Bruno, Masterson, Conor, De Naurois, M., ...
The detection of the binary system PSR B1259-63 / SS 2883 with the High Energy Stereoscopic System (H.E.S.S.) of four imaging atmospheric Cherenkov telescopes is reported. PSR B1259-63, a radio...
Discovery of an unidentified TeV source in the field of view of PSR B1259-63 with H.E.S.S. (2005)
Beilicke, M., Khélifi, Bruno, Masterson, Conor, De Naurois, M., Raue, M., ...
The detection of an unidentified extended TeV gamma-ray source in the Southern Cross region close to the galactic plane being named HESS J1303-631 is reported. The observations have been performed...
The unidentified TeV source (TeV J2032+4130) and surrounding field: Final HEGRA IACT-Syste (2005)
Aharonian, Felix, Akhperjanian, A., Beilicke, M., Bernlöhr, K., Bojahr, H., ...
The unidentified TeV source in Cygnus is now confirmed by follow-up observations from 2002 with the HEGRA stereoscopic system of Cherenkov Telescopes. Using all data (1999 to 2002) we confirm this...
Search for TeV emission from the region around PSR B1706-44 with the H.E.S.S. experiment (2005)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., ...
The region around PSR B1706-44 has been observed with the HESS imaging atmospheric Cherenkov telescopes in 2003. No evidence for gamma-ray emission in the TeV range was found at the pulsar position...
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., ...
The Supernova Remnant MSH 15-52 has been observed in very high energy (VHE) gamma-rays using the HESS 4-telescope array located in Namibia. A gamma-ray signal is detected at the 25 sigma level during...
Aharonian, F., Akhperjanian, A. G., Borrel, V., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., ...
We report the detection of TeV -rays from the shell-type supernova remnant RX J0852.0-4622 with data of 3.2 h of live time recorded with HESS in February 2004. An excess of (700 ± 60) events from...
Observations of Mkn 421 in 2004 with HESS at large zenith angles (2005)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., ...
Mkn 421 was observed during a high flux state for nine nights in April and May 2004 with the fully operational High Energy Stereoscopic System (HESS) in Namibia. The observations were carried out at...
Upper limits to the SN1006 multi-TeV gamma-ray flux from H.E.S.S. observations (2005)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., ...
Observations of the shell-type supernova remnant SN1006 have been carried out with the HESS system of Cherenkov telescopes during 2003 (18.2 h with two operating telescopes) and 2004 (6.3 h with all...
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., ...
We report the discovery of very-high-energy (VHE) gamma-ray emission of the binary system PSR B1259-63/SS 2883 of a radio pulsar orbiting a massive, luminous Be star in a highly eccentric orbit. The...
Discovery of Very High Energy Gamma Rays Associated with an X-ray Binary (2005)
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., ...
X-ray binaries are composed of a normal star in orbit around a neutron star or stellar-mass black hole. Radio and x-ray observations have led to the presumption that some x-ray binaries called...
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., ...
We report on a possible association of the recently discovered very high-energy gamma-ray source HESS J1825--137 with the pulsar wind nebula (commonly referred to as G 18.0--0.7) of the 2.1 x 104...
Aharonian, Felix, Akhperjanian, A., Beilicke, M., Bernlöhr, K., Bojahr, H., ...
We present results of a search for TeV -ray emission from the microquasar SS-433 and the surrounding region covering a ~ 8°x8° field of view. Analysis of data taken with the HEGRA stereoscopic...
Beilicke, M., Benbow, W., Cornils, R., Heinzelmann, G., Horns, D., ...
The giant radio galaxyM87was observed at TeV energies with the High Energy Stereoscopic System(H.E.S.S.)Cherenkov telescopes in 2003, during the construction phase, and in 2004/2005, with the full...
Large zenith angle observations of ares from Mkn 421 in 2004 with H.E.S.S. (2005)
Horns, D., Beilicke, M., Benbow, W., Lemière, A., De Naurois, M., Rolland, L., ...
Mkn 421 was observed during a high ux state for nine nights in April and May 2004 with the fully operational High Energy Stereoscopic System (H.E.S.S.) in Namibia. The observations were carried out...
Observations of 54 Active Galactic Nuclei with the HEGRA System of Cherenkov Telescopes (2004)
The HEGRA Collaboration, Aharonian, F., Akhperjanian, A., Beilicke, M.
A sample of 54 selected Active Galactic Nuclei (AGN) has been observed with the HEGRA stereoscopic system of Cherenkov Telescopes between 1996 and 2002 in the TeV energy regime. The observations were...
Aharonian, F., Akhperjanian, A., Beilicke, M., Bernlöhr, K., Börst, H. G., Bojahr, H., ...
In the first month of 2001 the AGN Mkn 421 showed highly variable, strong TeV activity at flux levels frequently exceeding 1 Crab. Here we present the light curve and energy spectrum of Mkn 421 as...
HEGRA Collaboration, Aharonian, F., Akhperjanian, A., Beilicke, M., Et Al.
TeV gamma-rays from the BL Lac object 1ES1959+650 have been measured during the years 2000 and 2001 with a significance of 5.2 sigma at a value of 5.3% of the Crab flux and in May 2002 during strong...
Is the Giant Radio Galaxy M87 a TeV Gamma-Ray Emitter? (2003)
HEGRA Collaboration, Aharonian, F., Akhperjanian, A., Beilicke, M., Et Al.
For the first time an excess of photons above an energy threshold of 730 GeV from the giant radio galaxy M87 has been measured at a significance level above 4 sigma. The data have been taken during...
Aharonian, Felix A., Akhperjanian, A., Beilicke, M., Bernlohr, K., Borst, H., Bojahr, H., ...
© The European Southern Observatory 2003
Is the giant radio galaxy M 87 a TeV gamma-ray emitter? (2003)
Aharonian, Felix A., Akhperjanian, A., Beilicke, M., Bernlohr, K., Borst, H., Bojahr, H., ...
© The European Southern Observatory 2003
Aharonian, Felix A., Akhperjanian, A., Beilicke, M., Bernlohr, K., Borst, H., Bojahr, H., ...
© The European Southern Observatory 2003
Is the giant radio galaxy M 87 a TeV gamma-ray emitter? (2003)
Aharonian, Felix A., Akhperjanian, A., Beilicke, M., Bernlohr, K., Borst, H., Bojahr, H., ...
© The European Southern Observatory 2003
An unidentified TeV source in the vicinity of Cygnus OB2 (2002)
Aharonian, F. A., Akhperjanian, A., Beilicke, M., Uchiyama, Y., Takahashi, T.
Deep observation (~113 hrs) of the Cygnus region at TeV energies using the HEGRA stereoscopic system of air Cerenkov telescopes has serendipitously revealed a signal positionally inside the core of...
An unidentified TeV source in the vicinity of Cygnus OB2 (2002)
Aharonian, Felix A., Akhperjanian, A., Beilicke, M., Bernlohr, K., Borst, H., Bojahr, H., ...
© The European Southern Observatory 2002
TeV gamma rays from the blazar H 1426+428 and the diffuse extragalactic background radiation (2002)
Aharonian, Felix A., Akhperjanian, A., Barrio, J. A., Beilicke, M., Bernlohr, K., Borst, H., ...
© The European Southern Observatory 2002
An unidentified TeV source in the vicinity of Cygnus OB2 (2002)
Aharonian, Felix A., Akhperjanian, A., Beilicke, M., Bernlohr, K., Borst, H., Bojahr, H., ...
© The European Southern Observatory 2002
TeV gamma rays from the blazar H 1426+428 and the diffuse extragalactic background radiation (2002)
Aharonian, Felix A., Akhperjanian, A., Barrio, J. A., Beilicke, M., Bernlohr, K., Borst, H., ...
© The European Southern Observatory 2002
Search for very high energy γ-ray emission from the starburst galaxy NGC 253 with H.E.S.S.
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., ...
We present the result of observations of the nearby starburst galaxy NGC 253 with the H.E.S.S. detector in 2003. We find no evidence for very high gamma-ray emission from this object. Gamma-ray...
Serendipitous discovery of the unidentified extended TeV gamma-ray source HESS J1303-631
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., ...
The serendipitous discovery of an unidentified extended TeV gamma-ray source close to the galactic plane named HESS J1303-631 at a significance of 21 standard deviations is reported. The observations...
Multi-wavelength observations of PKS 2155-304 with H.E.S.S
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., ...
The High Energy Stereoscopic System (H.E.S.S.) has observed the high-frequency peaked BL Lac object PKS2155-304 in 2003 between October 19 and November 26 in Very High Energy (VHE) gamma-rays (E>160...
A search for very high energy gamma-ray emission from the starburst galaxy NGC 253 with H.E.S.S
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., ...
We present the result of 28 hours of observations of the nearby starburst galaxy NGC 253 with the H.E.S.S. detector in 2003. We find no evidence for very high energy gamma-ray emission from this...
Resolving the Extragalactic Background Light with gamma-ray spectra from distant blazars
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., ...
The diffuse Extragalactic Background Light (EBL) contains unique information about the epochs of formation and the history of evolution of galaxies. Unfortunately, direct measurements are subject to...
3.9 day orbital modulation in the TeV gamma-ray flux and spectrum from the X-ray binary LS 5039
Aharonian, Felix, Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, Wystan, ...
New observations of LS 5039, a High Mass X-ray Binary comprising a massive star and compact object, were carried out with the High Energy Stereoscopic System of Cherenkov Telescopes (H.E.S.S.) in...