Localising the H.E.S.S. Galactic Centre point source

Abstract

Observations by the H.E.S.S. system of imaging atmospheric Cherenkov telescopes provide the most sensitive measurements of the Galactic Centre region in the energy range 150 GeV - 30 TeV. The vicinity of the kinetic centre of our galaxy harbours numerous objects which could potentially accelerate particles to very high energies (VHE, > 100 GeV) and thus produce the Gamma-ray flux observed. Within statistical and systematic errors, the centroid of the point-like emission measured by H.E.S.S. was found to be in good agreement with the position of the supermassive black hole Sgr A* and the recently discovered PWN candidate G359.95-0.04. Given a systematic pointing error of about 30'', a possible association with the SNR Sgr A East could not be ruled out with the 2004 H.E.S.S. data. In this contribution an update is given on the position of the H.E.S.S. Galactic Centre source using 2005/2006 data. The systematic pointing error is reduced to 6'' per axis using guiding telescopes for pointing corrections, making it possible to exclude with high significance Sgr A East as the source of the VHE Gamma-Rays.

4 pages, 2 figures, contribution to the 30th International Cosmic Ray Conference in Merida, Mexico, July 2007

References in corpus (12)

• Observations of the Crab Nebula with H.E.S.S
• Discovery of Very-High-Energy Gamma-Rays from the Galactic Centre Ridge
• Very high energy gamma rays from the direction of Sagittarius A*
• The Proper Motion of SgrA*: I. First VLBA Results
• H.E.S.S. observations of the Galactic Center region and their possible dark matter interpretation
• A Chandra Study of Sgr A East: A Supernova Remnant Regulating The Activity Of Our Galactic Center?
• Detection of Sub-TeV Gamma-Rays from the Galactic Center Direction by CANGAROO-II
• TeV Gamma-Ray Observations of the Galactic Center
• Observation of Gamma Rays from the Galactic Center with the MAGIC Telescope
• Very high energy gamma rays from the composite SNR G0.9+0.1
• High energy gamma rays from the massive black hole in the Galactic Center
• G359.95-0.04: Pulsar Candidate Near Sgr A*

Cited by in corpus (7)

• On The Origin Of The Gamma Rays From The Galactic Center
• Discovery of very high energy gamma-ray emission from Centaurus A with H.E.S.S
• A comment on the emission from the Galactic Center as seen by the Fermi telescope
• Stringent and Robust Constraints on the Dark Matter Annihilation Cross Section From the Region of the Galactic Center
• Fitting the Gamma-Ray Spectrum from Dark Matter with DMFIT: GLAST and the Galactic Center Region
• Multi-wavelength signals of dark matter annihilations at the Galactic center
• Searching for High Energy Neutrino counterpart signals; The case of the Fermi Bubbles signal and of Dark Matter annihilation in the inner Galaxy