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TeV Gamma-ray Observations of The Galactic Center Ridge By VERITAS
Journal article   Open access

TeV Gamma-ray Observations of The Galactic Center Ridge By VERITAS

W. Benbow, X. Chen, A. Furniss, M. Krause, J. Millis, Martin Pohl, A. W. Smith, A. Archer, R. Bird, M. Buchovecky, …
26 Feb 2016
DOI: https://doi.org/10.3204/PUBDB-2016-02015
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https://doi.org/10.3204/pubdb-2016-02015View
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Abstract

Astrophysics Galaxy Astrophysics High Energy Astrophysical Phenomena
The Galactic Center ridge has been observed extensively in the past by both GeV and TeV gamma-ray instrumentsrevealing a wealth of structure, including a diffuse component and the point sources G0.9+0.1 (a compositesupernova remnant) and Sgr A*(believed to be associated with the supermassive black hole located at the center of our Galaxy). Previous very high energy (VHE) gamma-ray observations with the H.E.S.S. experiment have also detected an extended TeV gamma-ray component along the Galactic plane in the > 300 GeV gamma-ray regime. Here we report on observations of the Galactic Center ridge from 2010 to 2014 by the VERITAS telescope array in the > 2 TeV energy range. From these observations we (1) provide improved measurements of the differential energy spectrum for Sgr A* in the > 2 TeV gamma-ray regime, (2) provide a detection in the > 2 TeV gamma-ray emission from the composite SNR G0.9+0.1 and an improved determination of its multi-TeV gamma-ray energy spectrum, and (3) report on the detection of VER J1746-289, a localized enhancement of > 2 TeV gamma-rayemission along the Galactic plane.

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