Observations of the Crab Nebula with H.E.S.S

F. Aharonian; A.G. Akhperjanian; A.R. Bazer-Bachi; M. Beilicke; W. Benbow; D. Berge; K. Bernlöhr; C. Boisson; O. Bolz; V. Borrel; I. Braun; F. Breitling; A.M. Brown; R. Bühler; I. Büsching; S. Carrigan; P. M. Chadwick; L.-M. Chounet; R. Cornils; L. Costamante; B. Degrange; H. J. Dickinson; A. Djannati-Ataï; L. O'C. Drury; G. Dubus; K. Egberts; D. Emmanoulopoulos; P. Espigat; F. Feinstein; E. Ferrero; A. Fiasson; G. Fontaine; Seb. Funk; S. Funk; Y.A. Gallant; B. Giebels; J.F. Glicenstein; P. Goret; C. Hadjichristidis; D. Hauser; M. Hauser; G. Heinzelmann; G. Henri; G. Hermann; J.A. Hinton; W. Hofmann; M. Holleran; D. Horns; A. Jacholkowska; O.C. de Jager; B. Khélifi; Nu. Komin; A. Konopelko; K. Kosack; I.J. Latham; R. Le Gallou; A. Lemière; M. Lemoine-Goumard; T. Lohse; J.M. Martin; O. Martineau-Huynh; A. Marcowith; C. Masterson; T.J.L. Mccomb; M. de Naurois; D. Nedbal; S.J. Nolan; A. Noutsos; K.J. Orford; J.L. Osborne; M. Ouchrif; M. Panter; G. Pelletier; S. Pita; G. Pühlhofer; M. Punch; B.C. Raubenheimer; M. Raue; S.M. Rayner; A. Reimer; O. Reimer; J. Ripken; L. Rob; L. Rolland; G. Rowell; V. Sahakian; L. Saugé; S. Schlenker; R. Schlickeiser; U. Schwanke; H. Sol; D. Spangler; F. Spanier; R. Steenkamp; C. Stegmann; G. Superina; J.-P. Tavernet; R. Terrier; C.G. Théoret; M. Tluczykont; C. van Eldik; G. Vasileiadis; C. Venter; P. Vincent; H.J. Völk; S. J. Wagnern; M. Ward

doi:10.1051/0004-6361:20065351

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Observations of the Crab Nebula with H.E.S.S

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Observations of the Crab Nebula with H.E.S.S

F. Aharonian, A.G. Akhperjanian, A.R. Bazer-Bachi, M. Beilicke, W. Benbow, D. Berge, K. Bernlöhr, C. Boisson, O. Bolz, V. Borrel, …

Astronomy & Astrophysics - A&A, Vol.457, pp.899-915

2006

DOI: https://doi.org/10.1051/0004-6361:20065351

Abstract

The Crab nebula was observed with the H.E.S.S. stereoscopic Cherenkov-telescope array between October 2003 and January 2005 for a total of 22.9 hours (after data quality selection). Observations were made with three operational telescopes in late 2003 and with the complete 4 telescope array in January - February 2004 and October 2004 - January 2005. The observations are discussed and used as an example to detail the flux and spectral analysis procedures of H.E.S.S., and to evaluate the systematic uncertainties in H.E.S.S. flux measurements. The flux and spectrum of gamma-rays from the source are calculated on run-by-run and monthly time-scales, and a correction is applied for long-term variations in the detector sensitivity. Comparisons of the measured flux and spectrum over the observation period, along with the results from a number of different analysis procedures are used to estimate systematic uncertainties in the measurements. The energy spectrum is found to follow a power law with an exponential cutoff, with photon index $\Gamma = 2.39 \pm 0.03\stat$ and cutoff energy $E_{c} = (14.3 \pm 2.1\stat) \textrm{TeV}$ between 440 GeV and 40 TeV. The observed integral flux above 1 TeV is $(2.26 \pm 0.08\stat) \times 10^{-11} cm^{-2} s^{-1}$. The estimated systematic error on the flux measurement is estimated to be 20%, while the estimated systematic error on the spectral slope is 0.1.

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Title: Observations of the Crab Nebula with H.E.S.S
Creators - without role: F. Aharonian - Max Planck Innovation
A.G. Akhperjanian - A. Alikhanyan National Laboratory
A.R. Bazer-Bachi - Université Toulouse III - Paul Sabatier
M. Beilicke - Universität Hamburg
W. Benbow - Max Planck Innovation
D. Berge - Max Planck Innovation
K. Bernlöhr - Humboldt-Universität zu Berlin
C. Boisson - Centre National de la Recherche Scientifique
O. Bolz - Max Planck Innovation
V. Borrel - Université Toulouse III - Paul Sabatier
I. Braun - Max Planck Innovation
F. Breitling - Humboldt-Universität zu Berlin
A.M. Brown - Durham University
R. Bühler - Max Planck Society
I. Büsching - North-West University
S. Carrigan - Max Planck Innovation
P. M. Chadwick
L.-M. Chounet - Laboratoire Leprince-Ringuet
R. Cornils - Universität Hamburg
L. Costamante
B. Degrange - École Polytechnique
H. J. Dickinson
A. Djannati-Ataï - AstroParticule et Cosmologie
L. O'C. Drury
G. Dubus - Laboratoire Leprince-Ringuet
K. Egberts - Max Planck Society
D. Emmanoulopoulos - Heidelberg University
P. Espigat - AstroParticule et Cosmologie
F. Feinstein - Laboratoire de Physique Théorique
E. Ferrero - Heidelberg University
A. Fiasson - Laboratoire de Physique Théorique
G. Fontaine - Laboratoire Leprince-Ringuet
Seb. Funk - Humboldt-Universität zu Berlin
S. Funk - Humboldt-Universität zu Berlin
Y.A. Gallant - Institut National de Physique Nucléaire et de Physique des Particules
B. Giebels - Laboratoire Leprince-Ringuet
J.F. Glicenstein - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
P. Goret - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
C. Hadjichristidis - Durham University
D. Hauser - Max Planck Innovation
M. Hauser - Heidelberg University
G. Heinzelmann - Universität Hamburg
G. Henri - Centre National de la Recherche Scientifique
G. Hermann - Max Planck Society
J.A. Hinton - Heidelberg University
W. Hofmann - Max Planck Innovation
M. Holleran - North-West University
D. Horns - University of Tübingen
A. Jacholkowska - Laboratoire de Physique Théorique
O.C. de Jager - North-West University
B. Khélifi - École Polytechnique
Nu. Komin - Institut National de Physique Nucléaire et de Physique des Particules
A. Konopelko - Humboldt-Universität zu Berlin
K. Kosack - Max Planck Innovation
I.J. Latham - Durham University
R. Le Gallou - Durham University
A. Lemière - AstroParticule et Cosmologie
M. Lemoine-Goumard - Laboratoire Leprince-Ringuet
T. Lohse - Humboldt-Universität zu Berlin
J.M. Martin - Observatoire de Paris
O. Martineau-Huynh - Laboratoire de Physique Nucléaire et de Hautes Énergies
A. Marcowith - Laboratoire d'Analyse et d'Architecture des Systèmes
C. Masterson
T.J.L. Mccomb - Durham University
M. de Naurois - Laboratoire de Physique Nucléaire et de Hautes Énergies
D. Nedbal - Charles University
S.J. Nolan - Durham University
A. Noutsos - Durham University
K.J. Orford - Durham University
J.L. Osborne - Durham University
M. Ouchrif - Sorbonne Université
M. Panter - Max Planck Innovation
G. Pelletier - Centre National de la Recherche Scientifique
S. Pita - AstroParticule et Cosmologie
G. Pühlhofer - Heidelberg University
M. Punch - AstroParticule et Cosmologie
B.C. Raubenheimer - North-West University
M. Raue - Universität Hamburg
S.M. Rayner - Durham University
A. Reimer - Ruhr University Bochum
O. Reimer - Ruhr University Bochum
J. Ripken - Universität Hamburg
L. Rob - Charles University
L. Rolland - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
G. Rowell - Max Planck Innovation
V. Sahakian - A. Alikhanyan National Laboratory
L. Saugé - Université Joseph Fourier
S. Schlenker - Humboldt-Universität zu Berlin
R. Schlickeiser - Ruhr University Bochum
U. Schwanke - Humboldt-Universität zu Berlin
H. Sol - Centre National de la Recherche Scientifique
D. Spangler - Durham University
F. Spanier - Ruhr University Bochum
R. Steenkamp - University of Namibia
C. Stegmann - Humboldt-Universität zu Berlin
G. Superina - École Polytechnique
J.-P. Tavernet - Laboratoire de Physique Nucléaire et de Hautes Énergies
R. Terrier - AstroParticule et Cosmologie
C.G. Théoret - AstroParticule et Cosmologie
M. Tluczykont - Laboratoire Leprince-Ringuet
C. van Eldik - Max Planck Innovation
G. Vasileiadis - Laboratoire de Physique Théorique
C. Venter - North-West University
P. Vincent - Laboratoire de Physique Nucléaire et de Hautes Énergies
H.J. Völk - Max Planck Innovation
S. J. Wagnern
M. Ward - Durham University
Publication Details: Astronomy & Astrophysics - A&A, Vol.457, pp.899-915
Identifiers: 9935259509311
Academic Unit: Université de Montpellier
Language: English
Resource Type: Journal article
Local Fields: in2p3-00107167