VERITAS Observations of the Galactic Center Region at Multi-TeV Gamma-Ray Energies

VERITAS Collaboration

VERITAS Observations of the Galactic Center Region at Multi-TeV Gamma-Ray Energies

VERITAS Collaboration

Physics

Columbia University
DePauw University
Harvard & Smithsonian
Washington University in St. Louis
Barnard College
California Polytechnic State University, San Luis Obispo
Iowa State University
Methodology Center at Penn State
University College Dublin
The Bartol Research Institute
University of Minnesota
California State University, East Bay
Georgia Institute of Technology
University of Galway
DESY
McGill University
Santa Cruz Institute for Particle Physics
University of Utah
University of Alabama
University of Iowa
Universidad Complutense de Madrid
University of California, Los Angeles
University of Potsdam
South Campus
Purdue University

Research output: Contribution to a Journal (Peer & Non Peer) › Conference article › peer-review

Abstract

The Galactic Center region hosts a variety of powerful astronomical sources and rare astrophysical processes that emit a large flux of non-thermal radiation. We present the analysis of the very-high-energy gamma-ray emission above 2 TeV of the region around the Galactic Center known as the Central Molecular Zone using 125 hours of data taken with the VERITAS imaging-atmospheric Cherenkov telescope between 2010 and 2018. This analysis employs new shower reconstruction algorithms and instrument response functions optimized for data taken at large zenith angles such as the Galactic Center sources. We report positions and spectra for point sources VER J1745-290, G0.9+0.1, and HESS J1746-285, along with a light curve for VER J1745-290, the brightest source in the region consistent with the position of the supermassive black hole Sagittarius A*. We also measure the spectrum of the diffuse emission from the Galactic Center ridge region, which has been claimed as evidence of a Galactic PeVatron.

Original language	English
Article number	833
Journal	Proceedings of Science
Volume	395
Publication status	Published - 18 Mar 2022
Event	37th International Cosmic Ray Conference, ICRC 2021 - Virtual, Berlin, Germany Duration: 12 Jul 2021 → 23 Jul 2021

Cite this

@article{0b5ccca97c7a483aa1bc4f69e4fcfa3a,

title = "VERITAS Observations of the Galactic Center Region at Multi-TeV Gamma-Ray Energies",

abstract = "The Galactic Center region hosts a variety of powerful astronomical sources and rare astrophysical processes that emit a large flux of non-thermal radiation. We present the analysis of the very-high-energy gamma-ray emission above 2 TeV of the region around the Galactic Center known as the Central Molecular Zone using 125 hours of data taken with the VERITAS imaging-atmospheric Cherenkov telescope between 2010 and 2018. This analysis employs new shower reconstruction algorithms and instrument response functions optimized for data taken at large zenith angles such as the Galactic Center sources. We report positions and spectra for point sources VER J1745-290, G0.9+0.1, and HESS J1746-285, along with a light curve for VER J1745-290, the brightest source in the region consistent with the position of the supermassive black hole Sagittarius A*. We also measure the spectrum of the diffuse emission from the Galactic Center ridge region, which has been claimed as evidence of a Galactic PeVatron.",

author = "\{VERITAS Collaboration\} and Adams, \{C. B.\} and A. Archer and W. Benbow and A. Brill and Buckley, \{J. H.\} and M. Capasso and Christiansen, \{J. L.\} and Chromey, \{A. J.\} and M. Errando and A. Falcone and Farrell, \{K. A.\} and Q. Feng and Foote, \{G. M.\} and L. Fortson and A. Furniss and A. Gent and Gillanders, \{G. H.\} and C. Giuri and O. Gueta and D. Hanna and O. Hervet and J. Holder and B. Hona and Humensky, \{T. B.\} and W. Jin and P. Kaaret and M. Kertzman and D. Kieda and Kleiner, \{T. K.\} and S. Kumar and Lang, \{M. J.\} and M. Lundy and G. Maier and McGrath, \{C. E.\} and P. Moriarty and R. Mukherjee and D. Nieto and M. Nievas-Rosillo and S. O'Brien and Ong, \{R. A.\} and Otte, \{A. N.\} and Patel, \{S. R.\} and S. Patel and K. Pfrang and M. Pohl and Prado, \{R. R.\} and E. Pueschel and J. Quinn and K. Ragan and Reynolds, \{P. T.\} and D. Ribeiro and E. Roache and Ryan, \{James L.\} and I. Sadeh and M. Santander and Sembroski, \{G. H.\} and R. Shang and D. Tak and Vassiliev, \{V. V.\} and A. Weinstein and Williams, \{D. A.\} and Williamson, \{T. J.\}",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0); 37th International Cosmic Ray Conference, ICRC 2021 ; Conference date: 12-07-2021 Through 23-07-2021",

year = "2022",

month = mar,

day = "18",

language = "English",

volume = "395",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

}

TY - JOUR

T1 - VERITAS Observations of the Galactic Center Region at Multi-TeV Gamma-Ray Energies

AU - VERITAS Collaboration

AU - Adams, C. B.

AU - Archer, A.

AU - Benbow, W.

AU - Brill, A.

AU - Buckley, J. H.

AU - Capasso, M.

AU - Christiansen, J. L.

AU - Chromey, A. J.

AU - Errando, M.

AU - Falcone, A.

AU - Farrell, K. A.

AU - Feng, Q.

AU - Foote, G. M.

AU - Fortson, L.

AU - Furniss, A.

AU - Gent, A.

AU - Gillanders, G. H.

AU - Giuri, C.

AU - Gueta, O.

AU - Hanna, D.

AU - Hervet, O.

AU - Holder, J.

AU - Hona, B.

AU - Humensky, T. B.

AU - Jin, W.

AU - Kaaret, P.

AU - Kertzman, M.

AU - Kieda, D.

AU - Kleiner, T. K.

AU - Kumar, S.

AU - Lang, M. J.

AU - Lundy, M.

AU - Maier, G.

AU - McGrath, C. E.

AU - Moriarty, P.

AU - Mukherjee, R.

AU - Nieto, D.

AU - Nievas-Rosillo, M.

AU - O'Brien, S.

AU - Ong, R. A.

AU - Otte, A. N.

AU - Patel, S. R.

AU - Patel, S.

AU - Pfrang, K.

AU - Pohl, M.

AU - Prado, R. R.

AU - Pueschel, E.

AU - Quinn, J.

AU - Ragan, K.

AU - Reynolds, P. T.

AU - Ribeiro, D.

AU - Roache, E.

AU - Ryan, James L.

AU - Sadeh, I.

AU - Santander, M.

AU - Sembroski, G. H.

AU - Shang, R.

AU - Tak, D.

AU - Vassiliev, V. V.

AU - Weinstein, A.

AU - Williams, D. A.

AU - Williamson, T. J.

N1 - Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)

PY - 2022/3/18

Y1 - 2022/3/18

N2 - The Galactic Center region hosts a variety of powerful astronomical sources and rare astrophysical processes that emit a large flux of non-thermal radiation. We present the analysis of the very-high-energy gamma-ray emission above 2 TeV of the region around the Galactic Center known as the Central Molecular Zone using 125 hours of data taken with the VERITAS imaging-atmospheric Cherenkov telescope between 2010 and 2018. This analysis employs new shower reconstruction algorithms and instrument response functions optimized for data taken at large zenith angles such as the Galactic Center sources. We report positions and spectra for point sources VER J1745-290, G0.9+0.1, and HESS J1746-285, along with a light curve for VER J1745-290, the brightest source in the region consistent with the position of the supermassive black hole Sagittarius A*. We also measure the spectrum of the diffuse emission from the Galactic Center ridge region, which has been claimed as evidence of a Galactic PeVatron.

AB - The Galactic Center region hosts a variety of powerful astronomical sources and rare astrophysical processes that emit a large flux of non-thermal radiation. We present the analysis of the very-high-energy gamma-ray emission above 2 TeV of the region around the Galactic Center known as the Central Molecular Zone using 125 hours of data taken with the VERITAS imaging-atmospheric Cherenkov telescope between 2010 and 2018. This analysis employs new shower reconstruction algorithms and instrument response functions optimized for data taken at large zenith angles such as the Galactic Center sources. We report positions and spectra for point sources VER J1745-290, G0.9+0.1, and HESS J1746-285, along with a light curve for VER J1745-290, the brightest source in the region consistent with the position of the supermassive black hole Sagittarius A*. We also measure the spectrum of the diffuse emission from the Galactic Center ridge region, which has been claimed as evidence of a Galactic PeVatron.

UR - https://www.scopus.com/pages/publications/85144591808

M3 - Conference article

AN - SCOPUS:85144591808

SN - 1824-8039

VL - 395

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 833

T2 - 37th International Cosmic Ray Conference, ICRC 2021

Y2 - 12 July 2021 through 23 July 2021

ER -

VERITAS Observations of the Galactic Center Region at Multi-TeV Gamma-Ray Energies

Abstract

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