Very high energy γ-ray observations of the binary PSR B1259-63/SS2883 around the 2007 Periastron

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: van Eldik C, Aharonian F, Akhperjanian AG, Anton G, De Almeida UB, Bazer-Bachi AR, Becherini Y, Behera B, Bernloehr K, Bochow A, Boisson C, Bolmont J, Borrel V, Brucker J, Brun F, Brun P, Buehler R, Bulik T, Buesching I, Boutelier T, Chadwick PM, Charbonnier A, Chaves RCG, Cheesebrough A, Chounet LM, Clapson AC, Coignet G, Dalton M, Daniel MK, Davids ID, Degrange B, Deil C, Dickinson HJ, Djannati-Atai A, Domainko W, Drury LO, Dubois F, Dubus G, Dyks J, Dyrda M, Egberts K, Emmanoulopoulos D, Espigat P, Farnier C, Feinstein F, Fiasson A, Foerster A, Fontaine G, Fuessling M, Gabici S, Gallant YA, Gerard L, Gerbig D, Giebels B, Glicenstein JF, Glueck B, Goret P, Göring D, Hauser D, Hauser M, Heinz S, Heinzelmann G, Henri G, Hermann G, Hinton JA, Hoffmann A, Hofmann W, Holleran M, Hoppe S, Horns D, Jacholkowska A, De Jager OC, Jahn C, Jung I, Katarzynski K, Katz U, Kaufmann S, Kerschhaggl M, Khangulyan D, Khelifi B, Keogh D, Klochkov D, Kluzniak W, Kneiske T, Komin N, Kosack K, Kossakowski R, Lamanna G, Lenain JP, Lohse T, Marandon V, Martineau-Huynh O, Marcowith A, Masbou J, Maurin D, Mccomb TJL, Medina MC, Moderski R, Moulin E, Naumann-Godo M, De Naurois M, Nedbal D, Nekrassov D, Nicholas B, Niemiec J, Nolan SJ, Ohm S, Olive JF, Wilhelmi EDO, Orford KJ, Ostrowski M, Panter M, Arribas MP, Pedaletti G, Pelletier G, Petrucci PO, Pita S, Puehlhofer G, Punch M, Quirrenbach A, Raubenheimer BC, Raue M, Rayner SM, Renaud M, Rieger F, Ripken J, Rob L, Rosier-Lees S, Rowell G, Rudak B, Rulten CB, Ruppel J, Sahakian V, Santangelo A, Schlickeiser R, Schoeck FM, Schwanke U, Schwarzburg S, Schwemmer S, Shalchi A, Sikora M, Skilton JL, Sol H, Spangler D, Stawarz L, Steenkamp R, Stegmann C, Stinzing F, Superina G, Szostek A, Tam PH, Tavernet JP, Terrier R, Tibolla O, Tluczykont M, Van Eldik C, Vasileiadis G, Venter C, Venter L, Vialle JP, Vincent P, Vivier M, Voelk HJ, Volpe F, Wagner SJ, Ward M, Zdziarski AA, Zech A
Zeitschrift: Astronomy & Astrophysics
Jahr der Veröffentlichung: 2009
Band: 507
Heftnummer: 1
Seitenbereich: 389-396
ISSN: 0004-6361
Sprache: Englisch


Abstract

Aims. This article presents very-high-energy (VHE; E > 100 GeV) data from the-ray binary PSRB1259-63 as taken during the years 2005, 2006 and before as well as shortly after the 2007 periastron passage. These data extend the knowledge of the lightcurve of this object to all phases of the 3.4 year binary orbit. The lightcurve constrains physical mechanisms present in this TeV source. Methods. Observations of VHE-rays with the HESS telescope array using the Imaging Atmospheric Cherenkov Technique were performed. The HESS instrument features an angular resolution of <0.1° and an energy resolution of <20%. Gamma-ray events in an energy range of 0.5-70 TeV were recorded. From these data, energy spectra and lightcurve with a monthly time sampling were extracted. Results. VHE-ray emission from PSRB1259-63 was detected with an overall significance of 9.5 standard deviations using 55 h of exposure, obtained from April to August 2007. The monthly flux of-rays during the observation period was measured, yielding VHE lightcurve data for the early pre-periastron phase of the system for the first time. No spectral variability was found on timescales of months. The spectrum is described by a power law with a photon index of G = 2.8 ± 0.2stat ± 0.2sys and flux normalisation F0 = (1.1 ± 0.1stat ± 0.2sys) × 10-12 TeV-1 cm-2 s-1. PSRB1259-63 was also monitored in 2005 and 2006, far from periastron passage, comprising 8.9 h and 7.5 h of exposure, respectively. No significant excess of-rays is seen in those observations. Conclusions.PSRB1259-63 has been re-confirmed as a variable TeV-ray emitter. The firm detection of VHE photons emitted at a true anomaly ? ≈-0.35 of the pulsar orbit, i.e. already 50 days prior to the periastron passage, disfavors the stellar disc target scenario as a primary emission mechanism, based on current knowledge about the companion star's disc inclination, extension, and density profile. © 2009 ESO.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Anton, Gisela Prof. Dr.
Lehrstuhl für Experimentalphysik (Teilchen- und Astroteilchenphysik)
Brucker, Julia Dr. rer. nat.
Lehrstuhl für Physik
Göring, Daniel Dr. rer. nat.
Lehrstuhl für Physik
Heinz, Sebastian
Lehrstuhl für Physik
Jahn, Constanze
Lehrstuhl für Experimentalphysik (Teilchen- und Astroteilchenphysik)
Katz, Uli Prof. Dr.
Lehrstuhl für Experimentalphysik (Astroteilchenphysik)
Stinzing, Friedrich Dr.
Lehrstuhl für Physik
van Eldik, Christopher Prof. Dr.
Professur für Experimentalphysik


Einrichtungen weiterer Autorinnen und Autoren

Centre CEA de Saclay (Essonne)
Dublin Institute for Advanced Studies (DIAS)
Durham University
Eberhard Karls Universität Tübingen
École Polytechnique - Université Paris-Saclay
Humboldt-Universität zu Berlin
Institute of Nuclear Physics PAN / Instytut Fizyki Jądrowej im. Henryka Niewodniczańskiego PAN
Jagiellonian University / Uniwersytet Jagielloński (UJ)
Max-Planck-Institut für Kernphysik (MPIK) / Max Planck Institute for Nuclear Physics
Nicolaus Copernicus Astronomical Centre of the Polish Academy of Sciences
Nicolaus Copernicus University / Uniwersytet Mikołaja Kopernika w Toruniu (UMK)
Noordwes-Universiteit / North-West University
Ruhr-Universität Bochum (RUB)
Ruprecht-Karls-Universität Heidelberg
Universität Hamburg
Université Joseph Fourier (UJF Grenoble 1)
Université Toulouse III - Paul Sabatier
University of Adelaide
University of Leeds
University of Montpellier / Université Montpellier
University of Namibia (UNAM)
University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot
University of Savoy Mont Blanc / Université Savoie Mont Blanc
Univerzita Karlova v Praze / Charles University in Prague
Yerevan Physics Institute (YerPhI) / Երևանի Ֆիզիկայի Ինստիտուտ


Zitierweisen

APA:
van Eldik, C., Aharonian, F., Akhperjanian, A.G., Anton, G., De Almeida, U.B., Bazer-Bachi, A.R.,... Zech, A. (2009). Very high energy γ-ray observations of the binary PSR B1259-63/SS2883 around the 2007 Periastron. Astronomy & Astrophysics, 507(1), 389-396. https://dx.doi.org/10.1051/0004-6361/200912339

MLA:
van Eldik, Christopher, et al. "Very high energy γ-ray observations of the binary PSR B1259-63/SS2883 around the 2007 Periastron." Astronomy & Astrophysics 507.1 (2009): 389-396.

BibTeX: 

Zuletzt aktualisiert 2018-26-10 um 21:53