Towards open and reproducible multi-instrument analysis in gamma-ray astronomy

被引：56

作者：

Nigro, C. ^{[1
]}

Deil, C. ^{[2
]}

Zanin, R. ^{[2
]}

Hassan, T. ^{[1
]}

King, J. ^{[3
]}

Ruiz, J. E. ^{[4
]}

Saha, L. ^{[5
]}

Terrier, R. ^{[6
]}

Bruegge, K. ^{[7
]}

Noethe, M. ^{[7
]}

Bird, R. ^{[8
]}

Lin, T. T. Y. ^{[9
]}

Aleksic, J. ^{[10
]}

Boisson, C. ^{[11
]}

Contreras, J. L. ^{[5
]}

Donath, A. ^{[2
]}

Jouvin, L. ^{[10
]}

Kelley-Hoskins, N. ^{[1
]}

Khelifi, B. ^{[6
]}

Kosack, K. ^{[12
]}

Rico, J. ^{[10
]}

Sinha, A. ^{[6
]}

机构：

[1] DESY, Platanenallee 6, D-15738 Zeuthen, Germany

[2] Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany

[3] Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany

[4] CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, E-18008 Granada, Spain

[5] Univ Complutense, Unidad Particulas & Cosmol UPARCOS, E-28040 Madrid, Spain

[6] Univ Paris Diderot, APC, AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France

[7] TU Dortmund, Astroteilchenphys E5b, D-44227 Dortmund, Germany

[8] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[9] McGill Univ, Phys Dept, Montreal, PQ H3A 2T8, Canada

[10] Barcelona Inst Sci & Technol, Inst Astrofis Altes Energies IFAE, Barcelona 08193, Spain

[11] Univ Paris Diderot, CNRS, PSL Res Univ, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France

[12] Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France

来源：

ASTRONOMY & ASTROPHYSICS | 2019年 / 625卷

关键词：

methods: data analysis; gamma rays: general; CRAB-NEBULA; PULSAR; TEV;

D O I：

10.1051/0004-6361/201834938

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The analysis and combination of data from different gamma-ray instruments involves the use of collaboration proprietary software and case-by-case methods. The effort of defining a common data format for high-level data, namely event lists and instrument response functions (IRFs), has recently started for very-high-energy gamma-ray instruments, driven by the upcoming Cherenkov Telescope Array (CTA). In this work we implemented this prototypical data format for a small set of MAGIC, VERITAS, FACT, and H.E.S.S. Crab nebula observations, and we analyzed them with the open-source gammapy software package. By combining data from Fermi-LAT, and from four of the currently operating imaging atmospheric Cherenkov telescopes, we produced a joint maximum likelihood fit of the Crab nebula spectrum. Aspects of the statistical errors and the evaluation of systematic uncertainty are also commented upon, along with the release format of spectral measurements. The results presented in this work are obtained using open-access on-line assets that allow for a long-term reproducibility of the results.

引用

页数：8

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