The H.E.S.S. Galactic plane survey

H.E.S.S. CollaborationS

doi:10.1051/0004-6361/201732098

The H.E.S.S. Galactic plane survey

H.E.S.S. CollaborationS

North-West University
Universität Hamburg
Max-Planck-Institut für Kernphysik
Dublin Institute for Advanced Studies
National Academy of Sciences of Armenia
Institute for Nuclear Physics
Rikkyo University
Sorbonne Univ.
Université Savoie Mont Blanc
University of Namibia
University of Amsterdam
Linnaeus University, Växjö
Ruhr-University Bochum
Medical University of Innsbruck
University of Adelaide
Sorbonne Université
c/o DESY
Laboratoire Univers et Particules de Montpellier
Univ. Bordeaux
Université Paris-Saclay
Friedrich-Alexander University (FAU) Erlangen-Nürnberg and Universitätsklinikum Erlangen
University of Warsaw
University of Tübingen
University of Kaiserslautern
University of the Witwatersrand, Johannesburg
Stockholm University
Wallenberg Academy Fellow
Astroparticule and Cosmol APC
University of Leicester
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
University of Potsdam
Aix Marseille Université
RWTH Aachen University
Landessternwarte Heidelberg
LTHE (UMR 5564 CNRS/IRD/Université de Grenoble)
Humboldt-Universität zu Berlin
Jagiellonian University
Nicolaus Copernicus University
ISAS/JAXA
University of New South Wales
University of the Free State
University of Heidelberg
University of Manitoba
Yerevan Physics Institute
University of São Paulo

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

We present the results of the most comprehensive survey of the Galactic plane in very high-energy (VHE) -rays, including a public release of Galactic sky maps, a catalog of VHE sources, and the discovery of 16 new sources of VHE -rays. The High Energy Spectroscopic System (H.E.S.S.) Galactic plane survey (HGPS) was a decade-long observation program carried out by the H.E.S.S. I array of Cherenkov telescopes in Namibia from 2004 to 2013. The observations amount to nearly 2700 h of quality-selected data, covering the Galactic plane at longitudes from l = 250° to 65° and latitudes |b| ≤ 3°. In addition to the unprecedented spatial coverage, the HGPS also features a relatively high angular resolution (0:08° ≈ 5 arcmin mean point spread function 68% containment radius), sensitivity (<1:5% Crab flux for point-like sources), and energy range (0.2-100 TeV). We constructed a catalog of VHE λ-ray sources from the HGPS data set with a systematic procedure for both source detection and characterization of morphology and spectrum. We present this likelihood-based method in detail, including the introduction of a model component to account for unresolved, large-scale emission along the Galactic plane. In total, the resulting HGPS catalog contains 78 VHE sources, of which 14 are not reanalyzed here, for example, due to their complex morphology, namely shell-like sources and the Galactic center region. Where possible, we provide a firm identification of the VHE source or plausible associations with sources in other astronomical catalogs. We also studied the characteristics of the VHE sources with source parameter distributions. 16 new sources were previously unknown or unpublished, and we individually discuss their identifications or possible associations. We firmly identified 31 sources as pulsar wind nebulae (PWNe), supernova remnants (SNRs), composite SNRs, or gamma-ray binaries. Among the 47 sources not yet identified, most of them (36) have possible associations with cataloged objects, notably PWNe and energetic pulsars that could power VHE PWNe.

langue originale	Anglais
Numéro d'article	A1
journal	Astronomy and Astrophysics
Volume	612
Les DOIs	https://doi.org/10.1051/0004-6361/201732098
état	Publié - 1 avr. 2018

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10.1051/0004-6361/201732098

Contient cette citation

@article{e34ed39b387e4538aef11f5afe9de706,

title = "The H.E.S.S. Galactic plane survey",

abstract = "We present the results of the most comprehensive survey of the Galactic plane in very high-energy (VHE) -rays, including a public release of Galactic sky maps, a catalog of VHE sources, and the discovery of 16 new sources of VHE -rays. The High Energy Spectroscopic System (H.E.S.S.) Galactic plane survey (HGPS) was a decade-long observation program carried out by the H.E.S.S. I array of Cherenkov telescopes in Namibia from 2004 to 2013. The observations amount to nearly 2700 h of quality-selected data, covering the Galactic plane at longitudes from l = 250° to 65° and latitudes |b| ≤ 3°. In addition to the unprecedented spatial coverage, the HGPS also features a relatively high angular resolution (0:08° ≈ 5 arcmin mean point spread function 68\% containment radius), sensitivity (<1:5\% Crab flux for point-like sources), and energy range (0.2-100 TeV). We constructed a catalog of VHE λ-ray sources from the HGPS data set with a systematic procedure for both source detection and characterization of morphology and spectrum. We present this likelihood-based method in detail, including the introduction of a model component to account for unresolved, large-scale emission along the Galactic plane. In total, the resulting HGPS catalog contains 78 VHE sources, of which 14 are not reanalyzed here, for example, due to their complex morphology, namely shell-like sources and the Galactic center region. Where possible, we provide a firm identification of the VHE source or plausible associations with sources in other astronomical catalogs. We also studied the characteristics of the VHE sources with source parameter distributions. 16 new sources were previously unknown or unpublished, and we individually discuss their identifications or possible associations. We firmly identified 31 sources as pulsar wind nebulae (PWNe), supernova remnants (SNRs), composite SNRs, or gamma-ray binaries. Among the 47 sources not yet identified, most of them (36) have possible associations with cataloged objects, notably PWNe and energetic pulsars that could power VHE PWNe.",

keywords = "Galaxy: general, Gamma rays: general, Surveys",

author = "\{H.E.S.S. CollaborationS\} and H. Abdalla and A. Abramowski and F. Aharonian and \{Ait Benkhali\}, F. and Ang{\"u}ner, \{E. O.\} and M. Arakawa and M. Arrieta and P. Aubert and M. Backes and A. Balzer and M. Barnard and Y. Becherini and \{Becker Tjus\}, J. and D. Berge and S. Bernhard and K. Bernl{\"o}hr and R. Blackwell and M. B{\"o}ttcher and C. Boisson and J. Bolmont and S. Bonnefoy and P. Bordas and J. Bregeon and F. Brun and P. Brun and M. Bryan and M. B{\"u}chele and T. Bulik and M. Capasso and S. Carrigan and S. Caroff and A. Carosi and S. Casanova and M. Cerruti and N. Chakraborty and Chaves, \{R. C.G.\} and A. Chen and J. Chevalier and S. Colafrancesco and B. Condon and J. Conrad and Davids, \{I. D.\} and J. Decock and C. Deil and J. Devin and \{De Wilt\}, P. and L. Dirson and A. Djannati-Ata{\"i} and W. Domainko and S. Fegan",

note = "Publisher Copyright: {\textcopyright} ESO 2018.",

year = "2018",

month = apr,

day = "1",

doi = "10.1051/0004-6361/201732098",

language = "English",

volume = "612",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

}

TY - JOUR

T1 - The H.E.S.S. Galactic plane survey

AU - H.E.S.S. CollaborationS

AU - Abdalla, H.

AU - Abramowski, A.

AU - Aharonian, F.

AU - Ait Benkhali, F.

AU - Angüner, E. O.

AU - Arakawa, M.

AU - Arrieta, M.

AU - Aubert, P.

AU - Backes, M.

AU - Balzer, A.

AU - Barnard, M.

AU - Becherini, Y.

AU - Becker Tjus, J.

AU - Berge, D.

AU - Bernhard, S.

AU - Bernlöhr, K.

AU - Blackwell, R.

AU - Böttcher, M.

AU - Boisson, C.

AU - Bolmont, J.

AU - Bonnefoy, S.

AU - Bordas, P.

AU - Bregeon, J.

AU - Brun, F.

AU - Brun, P.

AU - Bryan, M.

AU - Büchele, M.

AU - Bulik, T.

AU - Capasso, M.

AU - Carrigan, S.

AU - Caroff, S.

AU - Carosi, A.

AU - Casanova, S.

AU - Cerruti, M.

AU - Chakraborty, N.

AU - Chaves, R. C.G.

AU - Chen, A.

AU - Chevalier, J.

AU - Colafrancesco, S.

AU - Condon, B.

AU - Conrad, J.

AU - Davids, I. D.

AU - Decock, J.

AU - Deil, C.

AU - Devin, J.

AU - De Wilt, P.

AU - Dirson, L.

AU - Djannati-Ataï, A.

AU - Domainko, W.

AU - Fegan, S.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - We present the results of the most comprehensive survey of the Galactic plane in very high-energy (VHE) -rays, including a public release of Galactic sky maps, a catalog of VHE sources, and the discovery of 16 new sources of VHE -rays. The High Energy Spectroscopic System (H.E.S.S.) Galactic plane survey (HGPS) was a decade-long observation program carried out by the H.E.S.S. I array of Cherenkov telescopes in Namibia from 2004 to 2013. The observations amount to nearly 2700 h of quality-selected data, covering the Galactic plane at longitudes from l = 250° to 65° and latitudes |b| ≤ 3°. In addition to the unprecedented spatial coverage, the HGPS also features a relatively high angular resolution (0:08° ≈ 5 arcmin mean point spread function 68% containment radius), sensitivity (<1:5% Crab flux for point-like sources), and energy range (0.2-100 TeV). We constructed a catalog of VHE λ-ray sources from the HGPS data set with a systematic procedure for both source detection and characterization of morphology and spectrum. We present this likelihood-based method in detail, including the introduction of a model component to account for unresolved, large-scale emission along the Galactic plane. In total, the resulting HGPS catalog contains 78 VHE sources, of which 14 are not reanalyzed here, for example, due to their complex morphology, namely shell-like sources and the Galactic center region. Where possible, we provide a firm identification of the VHE source or plausible associations with sources in other astronomical catalogs. We also studied the characteristics of the VHE sources with source parameter distributions. 16 new sources were previously unknown or unpublished, and we individually discuss their identifications or possible associations. We firmly identified 31 sources as pulsar wind nebulae (PWNe), supernova remnants (SNRs), composite SNRs, or gamma-ray binaries. Among the 47 sources not yet identified, most of them (36) have possible associations with cataloged objects, notably PWNe and energetic pulsars that could power VHE PWNe.

AB - We present the results of the most comprehensive survey of the Galactic plane in very high-energy (VHE) -rays, including a public release of Galactic sky maps, a catalog of VHE sources, and the discovery of 16 new sources of VHE -rays. The High Energy Spectroscopic System (H.E.S.S.) Galactic plane survey (HGPS) was a decade-long observation program carried out by the H.E.S.S. I array of Cherenkov telescopes in Namibia from 2004 to 2013. The observations amount to nearly 2700 h of quality-selected data, covering the Galactic plane at longitudes from l = 250° to 65° and latitudes |b| ≤ 3°. In addition to the unprecedented spatial coverage, the HGPS also features a relatively high angular resolution (0:08° ≈ 5 arcmin mean point spread function 68% containment radius), sensitivity (<1:5% Crab flux for point-like sources), and energy range (0.2-100 TeV). We constructed a catalog of VHE λ-ray sources from the HGPS data set with a systematic procedure for both source detection and characterization of morphology and spectrum. We present this likelihood-based method in detail, including the introduction of a model component to account for unresolved, large-scale emission along the Galactic plane. In total, the resulting HGPS catalog contains 78 VHE sources, of which 14 are not reanalyzed here, for example, due to their complex morphology, namely shell-like sources and the Galactic center region. Where possible, we provide a firm identification of the VHE source or plausible associations with sources in other astronomical catalogs. We also studied the characteristics of the VHE sources with source parameter distributions. 16 new sources were previously unknown or unpublished, and we individually discuss their identifications or possible associations. We firmly identified 31 sources as pulsar wind nebulae (PWNe), supernova remnants (SNRs), composite SNRs, or gamma-ray binaries. Among the 47 sources not yet identified, most of them (36) have possible associations with cataloged objects, notably PWNe and energetic pulsars that could power VHE PWNe.

KW - Galaxy: general

KW - Gamma rays: general

KW - Surveys

U2 - 10.1051/0004-6361/201732098

DO - 10.1051/0004-6361/201732098

M3 - Article

AN - SCOPUS:85045448548

SN - 0004-6361

VL - 612

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A1

ER -

The H.E.S.S. Galactic plane survey

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