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INTEGRAL view of TeV sources: a legacy for the CTA Project

INTEGRAL view of TeV sources: a legacy for the CTA Project
INTEGRAL view of TeV sources: a legacy for the CTA Project
Investigations that were carried out over the last two decades with novel and more sensitive instrumentation have dramatically improved our knowledge of the more violent physical processes taking place in galactic and extra-galactic Black-Holes, Neutron Stars, Supernova Remnants/Pulsar Wind Nebulae, and other regions of the Universe where relativistic acceleration processes are in place. In particular, simultaneous and/or combined observations with γγ-ray satellites and ground based high-energy telescopes, have clarified the scenario of the mechanisms responsible for high energy photon emission by leptonic and hadronic accelerated particles in the presence of magnetic fields. Specifically, the European Space Agency INTEGRAL soft γγ-ray observatory has detected more than 1000 sources in the soft γγ-ray band, providing accurate positions, light curves and time resolved spectral data for them. Space observations with Fermi-LAT and observations that were carried out from the ground with H.E.S.S., MAGIC, VERITAS, and other telescopes sensitive in the GeV-TeV domain have, at the same time, provided evidence that a substantial fraction of the cosmic sources detected are emitting in the keV to TeV band via Synchrotron-Inverse Compton processes, in particular from stellar galactic BH systems as well as from distant black holes. In this work, employing a spatial cross correlation technique, we compare the INTEGRAL/IBIS and TeV all-sky data in search of secure or likely associations. Although this analysis is based on a subset of the INTEGRAL all-sky observations (1000 orbits), we find that there is a significant correlation: 39 objects (∼20% of the VHE γγ-ray catalogue) show emission in both soft γγ-ray and TeV wavebands. The full INTEGRAL database, now comprising almost 19 years of public data available, will represent an important legacy that will be useful for the Cherenkov Telescope Array (CTA) and other ground based large projects.
2218-1997
135
Malizia, Angela
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Fiocchi, Mariateresa
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Natalucci, Lorenzo
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Sguera, Vito
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Stephen, John B.
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Bassani, Loredana
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Bazzano, Angela
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Ubertini, Pietro
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Pian, Elena
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Bird, Antony J.
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Malizia, Angela
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Fiocchi, Mariateresa
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Natalucci, Lorenzo
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Sguera, Vito
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Stephen, John B.
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Bassani, Loredana
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Bazzano, Angela
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Ubertini, Pietro
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Pian, Elena
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Bird, Antony J.
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Malizia, Angela, Fiocchi, Mariateresa, Natalucci, Lorenzo, Sguera, Vito, Stephen, John B., Bassani, Loredana, Bazzano, Angela, Ubertini, Pietro, Pian, Elena and Bird, Antony J. (2021) INTEGRAL view of TeV sources: a legacy for the CTA Project. Universe, 7 (5), 135. (doi:10.3390/universe7050135).

Record type: Article

Abstract

Investigations that were carried out over the last two decades with novel and more sensitive instrumentation have dramatically improved our knowledge of the more violent physical processes taking place in galactic and extra-galactic Black-Holes, Neutron Stars, Supernova Remnants/Pulsar Wind Nebulae, and other regions of the Universe where relativistic acceleration processes are in place. In particular, simultaneous and/or combined observations with γγ-ray satellites and ground based high-energy telescopes, have clarified the scenario of the mechanisms responsible for high energy photon emission by leptonic and hadronic accelerated particles in the presence of magnetic fields. Specifically, the European Space Agency INTEGRAL soft γγ-ray observatory has detected more than 1000 sources in the soft γγ-ray band, providing accurate positions, light curves and time resolved spectral data for them. Space observations with Fermi-LAT and observations that were carried out from the ground with H.E.S.S., MAGIC, VERITAS, and other telescopes sensitive in the GeV-TeV domain have, at the same time, provided evidence that a substantial fraction of the cosmic sources detected are emitting in the keV to TeV band via Synchrotron-Inverse Compton processes, in particular from stellar galactic BH systems as well as from distant black holes. In this work, employing a spatial cross correlation technique, we compare the INTEGRAL/IBIS and TeV all-sky data in search of secure or likely associations. Although this analysis is based on a subset of the INTEGRAL all-sky observations (1000 orbits), we find that there is a significant correlation: 39 objects (∼20% of the VHE γγ-ray catalogue) show emission in both soft γγ-ray and TeV wavebands. The full INTEGRAL database, now comprising almost 19 years of public data available, will represent an important legacy that will be useful for the Cherenkov Telescope Array (CTA) and other ground based large projects.

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Accepted/In Press date: 30 April 2021
e-pub ahead of print date: 7 May 2021

Identifiers

Local EPrints ID: 449497
URI: http://eprints.soton.ac.uk/id/eprint/449497
ISSN: 2218-1997
PURE UUID: b1d58a87-8d13-4e00-a744-3478f6e09122
ORCID for Antony J. Bird: ORCID iD orcid.org/0000-0002-6888-8937

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Date deposited: 03 Jun 2021 16:31
Last modified: 26 Nov 2021 02:36

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Contributors

Author: Angela Malizia
Author: Mariateresa Fiocchi
Author: Lorenzo Natalucci
Author: Vito Sguera
Author: John B. Stephen
Author: Loredana Bassani
Author: Angela Bazzano
Author: Pietro Ubertini
Author: Elena Pian
Author: Antony J. Bird ORCID iD

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