I. D. Davids
North-West University
68 Papers
277 Citations
I. D. Davids is an academic researcher from North-West University. The author has contributed to research in topics: Supernova remnant & High Energy Stereoscopic System. The author has an hindex of 30, co-authored 48 publications. Previous affiliations of I. D. Davids include University of Namibia.
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Papers
Probing the ATIC peak in the cosmic-ray electron spectrum with H.E.S.S.
Felix Aharonian,A. G. Akhperjanian,Gisela Anton,U. Barres de Almeida,A. R. Bazer-Bachi,Yvonne Becherini,B. Behera,Konrad Bernlöhr,A. Bochow,C. Boisson,J. Bolmont,V. Borrel,J. Brucker,Francois Brun,Pierre Brun,Rolf Bühler,T. Bulik,I. Büsching,Timothé Boutelier,P. M. Chadwick,A. Charbonnier,R. C. G. Chaves,A. Cheesebrough,L.-M. Chounet,G. Coignet,M. Dalton,M. K. Daniel,I. D. Davids,I. D. Davids,B. Degrange,Christoph Deil,Hugh Dickinson,A. Djannati-Ataï,W. Domainko,L. O'c. Drury,Franky Dubois,Guillaume Dubus,J. Dyks,M. Dyrda,Kathrin Egberts,Dimitrios Emmanoulopoulos,P. Espigat,Christian Farnier,F. Feinstein,A. Fiasson,A. Förster,Gerard Fontaine,M. Füßling,Stefano Gabici,Y. A. Gallant,L. Gérard,D. Gerbig,B. Giebels,J. F. Glicenstein,B. Glück,P. Goret,D. Göring,D. Hauser,M. Hauser,S. Heinz,G. Heinzelmann,Gilles Henri,G. Hermann,Jim Hinton,A. Hoffmann,Werner Hofmann,M. Holleran,S. Hoppe,Dieter Horns,A. Jacholkowska,O. C. de Jager,C. Jahn,I. Jung,K. Katarzyński,Uli Katz,Sarah Kaufmann,Eckhard Kendziorra,M. Kerschhaggl,D. Khangulyan,B. Khélifi,D. Keogh,W. Klu'Zniak,T. Kneiske,Nu. Komin,Karl Kosack,R. Kossakowski,G. Lamanna,J.-P. Lenain,Thomas Lohse,V. Marandon,J. M. Martin,Olivier Martineau-Huynh,Alexandre Marcowith,Julien Masbou,David Maurin,T. J. L. McComb,M. C. Medina,R. Moderski,Emmanuel Moulin,M. Naumann-Godo,M. de Naurois,D. Nedbal,D. Nekrassov,B. Nicholas,Jacek Niemiec,S. J. Nolan,Stefan Ohm,J-F. Olive,E. de O˜na,K. J. Orford,Michał Ostrowski,M. Panter,M. Paz Arribas,G. Pedaletti,G. Pelletier,P.-O. Petrucci,S. Pita,Gerd Pühlhofer,Michael Punch,Andreas Quirrenbach,B. C. Raubenheimer,Martin Raue,S. M. Rayner,Olaf Reimer,Matthieu Renaud,Frank M. Rieger,J. Ripken,L. Rob,S. Rosier-Lees,Gavin Rowell,B. Rudak,Cameron B Rulten,J. Ruppel,V. Sahakian,Andrea Santangelo,Reinhard Schlickeiser,F.M. Sch¨ock,R. Schröder,Ullrich Schwanke,S. Schwarzburg,S. Schwemmer,A. Shalchi,J. L. Skilton,Helene Sol,D. Spangler,L. Stawarz,R. Steenkamp,C. Stegmann,F. Stinzing,G. Superina,Anna Szostek,P. H. Tam,J.-P. Tavernet,Regis Terrier,O. Tibolla,M. Tluczykont,C. van Eldik,G. Vasileiadis,Christo Venter,L. Venter,J. P. Vialle,Pascal Vincent,M. Vivier,Heinrich J. Völk,Francesca Volpe,Stefan Wagner,Martin Ward,A. A. Zdziarski,A. Zech +168 more
TL;DR: In this article, the authors present a measurement of the cosmic-ray electron spectrum with H.E.S. starting at 340 GeV and show no indication of a structure in the electron spectrum, but rather a power-law spectrum with spectral index of 3.0 +- 0.1 (stat.) + − 0.3 (syst.) which steepens at about 1 TeV.
Acceleration of petaelectronvolt protons in the Galactic Centre
A. Abramowski,Felix Aharonian,Faical Ait Benkhali,A. G. Akhperjanian,E. O. Anguener,Michael Backes,A. Balzer,Yvonne Becherini,J. Becker Tjus,David Berge,S. Bernhard,K. Bernloehr,E. Birsin,R. Blackwell,Markus Boettcher,Catherine Boisson,J. Bolmont,Pol Bordas Coma,Johan Bregeon,Francois Brun,Pierre Brun,M. Bryan,Tomasz Bulik,J. Carr,Sabrina Casanova,Nachiketa Chakraborty,R. Chalme-Calvet,R. C. G. Chaves,A. W. Chen,M. Chrétien,S. Colafrancesco,G. Cologna,Jan Conrad,C. Couturier,Y. Cui,I. D. Davids,B. Degrange,Christoph Deil,P. deWilt,A. Djannati-Ata,W. Domainko,Axel Donath,L. O'c. Drury,Guillaume Dubus,K. Dutson,J. Dyks,M. Dyrda,Tanya Edwards,K. Egberts,Peter Eger,J.-P. Ernenwein,P. Espigat,C. Farnier,S. J. Fegan,F. Feinstein,M. V. Fernandes,D. Fernandez,A. Fiasson,G. Fontaine,A. Förster,M. Fuessling,Stefano Gabici,M. Gajdus,Y. A. Gallant,T. Garrigoux,Gianluca Giavitto,B. Giebels,J. F. Glicenstein,D. Gottschall,Arti Goyal,M. H. Grondin,M. Grudzińska,D. Hadasch,S. Haeffner,Joachim Hahn,J. Hawkes,G. Heinzelmann,Gilles Henri,G. Hermann,O. Hervet,Andreas Hillert,Jim Hinton,Werner Hofmann,Petter Hofverberg,Clemens Hoischen,M. Holler,Dieter Horns,A. Ivascenko,A. Jacholkowska,Marek Jamrozy,M. Janiak,Felix Jankowsky,I. Jung-Richardt,M. A. Kastendieck,K. Katarzyński,Uli Katz,D. Kerszberg,Bruno Khelifi,M. Kieffer,S. Klepser,D. Klochkov,W. Kluzniak,D. Kolitzus,Nu. Komin,K. Kosack,S. Krakau,F. Krayzel,P. P. Krueger,H. Laffon,G. Lamanna,J. Lau,J. Lefaucheur,V. Lefranc,A. Lemiere,M. Lemoine-Goumard,J-P. Lenain,Thomas Lohse,A. Lopatin,C-C Lu,R. Lui,Vincent Marandon,Alexandre Marcowith,C. Mariaud,Ramin Marx,Gilles Maurin,N. Maxted,M. Mayer,P. J. Meintjes,U. Menzler,Manuel Meyer,Alison Mitchell,Rafał Moderski,M. Mohamed,K. Morå,Emmanuel Moulin,Thomas Murach,M. de Naurois,Jacek Niemiec,L. Oakes,H. Odaka,S. Oettl,Stefan Ohm,B. Opitz,Michał Ostrowski,Igor Oya,M. Panter,R. D. Parsons,M. Paz Arribas,N. W. Pekeur,Guy Pelletier,P-O. Petrucci,B. Peyaud,Santiago Pita,Helen Poon,Heike Prokoph,G. Puehlhofer,Michael Punch,Andreas Quirrenbach,S. Raab,I. Reichardt,A. Reimer,Olaf Reimer,M. Renaud,Raquel de los Reyes,Frank M. Rieger,C. Romoli,S. Rosier-Lees,Gavin Rowell,B. Rudak,C. B. Rulten,V. Sahakian,David Salek,David Sánchez,Andrea Santangelo,Manami Sasaki,Reinhard Schlickeiser,F. Schuessler,André Schulz,Ullrich Schwanke,S. Schwemmer,A. S. Seyffert,Rachel Simoni,Helene Sol,Felix Spanier,G. Spengler,F. Spies,Lukasz Stawarz,R. Steenkamp,Christian Stegmann,F. Stinzing,K. Stycz,I. Sushch,J.-P. Tavernet,T. Tavernier,Andrew M. Taylor,Regis Terrier,M. Tluczykont,C. Trichard,Richard J. Tuffs,K. Valerius,J.L. Van der Walt,C. van Eldik,B. van Soelen,G. Vasileiadis,J. Veh,Christo Venter,Aion Viana,P. Vincent,Jacco Vink,F. Voisin,H. J. Voelk,Thomas Vuillaume,Stefan Wagner,P. Wagner,Robert Wagner,Matthias Weidinger,Quirin Weitzel,R. White,Alicja Wierzcholska,P. Willmann,A. Woernlein,Denis Wouters,Ruizhi Yang,Victor Zabalza,D. Zaborov,Michael Zacharias,Andrzej A. Zdziarski,A. Zech,F. Zefi,N. Zywucka +229 more
TL;DR: Deep γ-ray observations with arcminute angular resolution of the region surrounding the Galactic Centre are reported, which show the expected tracer of the presence of petaelectronvolt protons within the central 10 parsecs of the Galaxy, and it is proposed that the supermassive black hole Sagittarius A* is linked to this PeVatron.
The exceptionally powerful TeV γ-ray emitters in the Large Magellanic Cloud
A. Abramowski,Felix Aharonian,Faical Ait Benkhali,A. G. Akhperjanian,E. O. Angüner,Michael Backes,S. Balenderan,A. Balzer,A. Barnacka,Yvonne Becherini,J. Becker-Tjus,David Berge,S. Bernhard,Konrad Bernlöhr,E. Birsin,J. Biteau,J. Biteau,Markus Böttcher,Catherine Boisson,J. Bolmont,Pol Bordas,Johan Bregeon,Francois Brun,P. Brun,M. Bryan,Tomasz Bulik,Svenja Carrigan,Sabrina Casanova,P. M. Chadwick,Nachiketa Chakraborty,R. Chalme-Calvet,R. C. G. Chaves,M. Chrétien,S. Colafrancesco,G. Cologna,Jan Conrad,C. Couturier,Y. Cui,M. Dalton,I. D. Davids,I. D. Davids,B. Degrange,Christoph Deil,P. de Wilt,A. Djannati-Ataï,W. Domainko,Axel Donath,L. O’C. Drury,L. O’C. Drury,Guillaume Dubus,Guillaume Dubus,K. Dutson,J. Dyks,Michal Dyrda,Tanya Edwards,Kathrin Egberts,Peter Eger,P. Espigat,C. Farnier,S. J. Fegan,F. Feinstein,M. V. Fernandes,D. Fernandez,A. Fiasson,G. Fontaine,A. Foerster,M. Füßling,Stefano Gabici,M. Gajdus,Y. A. Gallant,T. Garrigoux,Gianluca Giavitto,B. Giebels,J. F. Glicenstein,D. Gottschall,M.-H. Grondin,M. Grudzińska,Daniela Hadasch,S. Häffner,Joachim Hahn,J. Harris,G. Heinzelmann,Gilles Henri,G. Hermann,O. Hervet,Andreas Hillert,Jim Hinton,Werner Hofmann,Petter Hofverberg,Markus Holler,Dieter Horns,A. Ivascenko,A. Jacholkowska,C. Jahn,Marek Jamrozy,Mateusz Janiak,Felix Jankowsky,I. Jung,M. A. Kastendieck,Krzysztof Katarzynski,U. Katz,Sarah Kaufmann,B. Khélifi,M. Kieffer,S. Klepser,D. Klochkov,W. Kluźniak,D. Kolitzus,Nu. Komin,K. Kosack,S. Krakau,F. Krayzel,P.P. Krüger,H. Laffon,G. Lamanna,Julien Lefaucheur,V. Lefranc,Anne Lemiere,M. Lemoine-Goumard,J.-P. Lenain,Thomas Lohse,A. Lopatin,Chia-Chun Lu,Vincent Marandon,A. Marcowith,Ramin Marx,Gilles Maurin,N. Maxted,M. Mayer,T. J. L. McComb,J. Mehault,P. J. Meintjes,U. Menzler,M. S. Meyer,Alison Mitchell,R. Moderski,M. Mohamed,K. Morå,E. Moulin,Thomas Murach,M. de Naurois,Jacek Niemiec,S. J. Nolan,L. B. Oakes,H. Odaka,Stefan Ohm,B. Opitz,M. Ostrowski,Igor Oya,M. Panter,R. D. Parsons,M. Paz Arribas,N. W. Pekeur,G. Pelletier,J. Perez,P.-O. Petrucci,B. Peyaud,S. Pita,Helen Poon,G. Pühlhofer,Michael Punch,Andreas Quirrenbach,S. Raab,Ignasi Reichardt,A. Reimer,Olaf Reimer,M. Renaud,R. de los Reyes,Frank M. Rieger,L. Rob,C. Romoli,S. Rosier-Lees,Gavin Rowell,B. Rudak,C. B. Rulten V. Sahakian,David Salek,David Sánchez,Andrea Santangelo,Reinhard Schlickeiser,F. Schüssler,André Schulz,U. Schwanke,S. Schwarzburg,S. Schwemmer,Helene Sol,Felix Spanier,G. Spengler,F. Spies,Ł. Stawarz,Riaan Steenkamp,Christian Stegmann,F. Stinzing,K. Stycz,I. Sushch,J.-P. Tavernet,Thomas Tavernier,Andrew M. Taylor,Regis Terrier,M. Tluczykont,C. Trichard,K. Valerius,C. van Eldik,B. van Soelen,G. Vasileiadis,Johannes Veh,Christo Venter,Aion Viana,Pascal Vincent,Jacco Vink,H. J. Voelk,Francesca Volpe,M. J. Vorster,T. Vuillaume,S. J. Wagner,P. Wagner,Robert Wagner,Martin Ward,Matthias Weidinger,Quirin Weitzel,R. White,Alicja Wierzcholska,P. Willmann,A. Wörnlein,Denis Wouters,Ruizhi Yang,Victor Zabalza,D. Zaborov,M. Zacharias,A. A. Zdziarski,A. Zech,H.-S. Zechlin +230 more
TL;DR: The Large Magellanic Cloud, a satellite galaxy of the Milky Way, has been observed with the High Energy Stereoscopic System above an energy of 100 billion electron volts for a deep exposure of 210 hours, and detections reveal the most energetic tip of a γ-ray source population in an external galaxy and provide via 30 Dor C the unambiguous detection of ε-ray emission from a superbubble.
First detection of VHE gamma-rays from SN 1006 by HESS
Fabio Acero,Felix Aharonian,A. G. Akhperjanian,Gisela Anton,U. Barres de Almeida,A. R. Bazer-Bachi,Yvonne Becherini,B. Behera,M. Beilicke,Konrad Bernlöhr,Konrad Bernlöhr,A. Bochow,C. Boisson,J. Bolmont,V. Borrel,J. Brucker,Francois Brun,Pierre Brun,Rolf Bühler,Tomasz Bulik,I. Büsching,Timothé Boutelier,P. M. Chadwick,A. Charbonnier,R. C. G. Chaves,A. Cheesebrough,Jan Conrad,L.-M. Chounet,A. C. Clapson,G. Coignet,M. Dalton,M. K. Daniel,I. D. Davids,I. D. Davids,B. Degrange,Christoph Deil,Hugh Dickinson,A. Djannati-Ataï,W. Domainko,L. O'c. Drury,Franky Dubois,Guillaume Dubus,J. Dyks,M. Dyrda,Kathrin Egberts,Peter Eger,P. Espigat,L. Fallon,C. Farnier,S. J. Fegan,F. Feinstein,A. Fiasson,A. Förster,Gerard Fontaine,M. Füßling,Stefano Gabici,Y. A. Gallant,L. Gérard,D. Gerbig,B. Giebels,J. F. Glicenstein,B. Glück,P. Goret,D. Göring,D. Hauser,M. Hauser,S. Heinz,G. Heinzelmann,Gilles Henri,G. Hermann,Jim Hinton,A. Hoffmann,Werner Hofmann,Petter Hofverberg,M. Holleran,S. Hoppe,Dieter Horns,A. Jacholkowska,O. C. de Jager,C. Jahn,I. Jung,K. Katarzyński,U. F. Katz,Sarah Kaufmann,M. Kerschhaggl,D. Khangulyan,B. Khélifi,D. Keogh,D. Klochkov,W. Kluzniak,T. Kneiske,Nu. Komin,K. Kosack,R. Kossakowski,G. Lamanna,Marianne Lemoine-Goumard,J.-P. Lenain,Thomas Lohse,V. Marandon,A. Marcowith,Julien Masbou,David Maurin,T. J. L. McComb,M. C. Medina,J. Mehault,Emmanuel Moulin,M. Naumann-Godo,M. de Naurois,D. Nedbal,D. Nekrassov,B. Nicholas,Jacek Niemiec,S. J. Nolan,Stefan Ohm,J-F. Olive,E. de Ona Wilhelmi K. J. Orford,Michał Ostrowski,M. Panter,M. Paz Arribas G. Pedaletti,G. Pelletier,P.-O. Petrucci,S. Pita,Gerd Pühlhofer,Michael Punch,Andreas Quirrenbach,B. C. Raubenheimer,Martin Raue,S. M. Rayner,Olaf Reimer,M. Renaud,R. de los Reyes,Frank M. Rieger,Joachim Ripken,L. Rob,S. Rosier-Lees,Gavin Rowell,B. Rudak,Cameron B Rulten,J. Ruppel,Felix Ryde,V. Sahakian,Andrea Santangelo,Reinhard Schlickeiser,F. M. Schöck,A. Schönwald,Ullrich Schwanke,S. Schwarzburg,S. Schwemmer,A. Shalchi,Iurii Sushch,M. Sikora,J. L. Skilton,Helene Sol,Łukasz Stawarz,R. Steenkamp,C. Stegmann,F. Stinzing,G. Superina,Anna Szostek,P. H. Tam,J.-P. Tavernet,Regis Terrier,Omar Tibolla,M. Tluczykont,C. van Eldik,G. Vasileiadis,Christo Venter,L. Venter,J. P. Vialle,Pascal Vincent,Jacco Vink,M. Vivier,Heinrich J. Völk,Francesca Volpe,Serguei Vorobiov,Stefan Wagner,Martin Ward,A. A. Zdziarski,A. Zech +178 more
- 01 Jun 2010
TL;DR: In this article, a very high energy (VHE) gamma-ray signal was detected from SN 1006, which is consistent with the previously established H.E.S. upper limit, thus motivating further in-depth observations of this source.
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Spectrum and variability of the Galactic Center VHE gamma-ray source HESS J1745-290
Felix Aharonian,Felix Aharonian,A. G. Akhperjanian,Gisela Anton,U. Barres de Almeida,A. R. Bazer-Bachi,Yvonne Becherini,B. Behera,Konrad Bernlöhr,Konrad Bernlöhr,Catherine Boisson,A. Bochow,V. Borrel,Ilana M. Braun,E. Brion,J. Brucker,Pierre Brun,Rolf Bühler,T. Bulik,I. Büsching,Timothé Boutelier,P. M. Chadwick,A. Charbonnier,R. C. G. Chaves,A. Cheesebrough,L.-M. Chounet,A. C. Clapson,G. Coignet,M. Dalton,M. K. Daniel,I. D. Davids,I. D. Davids,B. Degrange,Christoph Deil,Hugh Dickinson,A. Djannati-Ataï,W. Domainko,L. O'c. Drury,F. Dubois,Guillaume Dubus,J. Dyks,Michal Dyrda,Kathrin Egberts,Dimitrios Emmanoulopoulos,P. Espigat,Christian Farnier,F. Feinstein,A. Fiasson,A. Förster,G. Fontaine,M. Füßling,Stefano Gabici,Y. A. Gallant,L. Gérard,B. Giebels,J. F. Glicenstein,B. Glück,P. Goret,D. Hauser,M. Hauser,S. Heinz,G. Heinzelmann,Gilles Henri,G. Hermann,Jim Hinton,A. Hoffmann,Werner Hofmann,M. Holleran,S. Hoppe,Dieter Horns,A. Jacholkowska,O. C. de Jager,I. Jung,K. Katarzyński,U. F. Katz,Sarah Kaufmann,Eckhard Kendziorra,M. Kerschhaggl,D. Khangulyan,B. Khélifi,D. Keogh,Nu. Komin,Karl Kosack,G. Lamanna,J.-P. Lenain,Thomas Lohse,V. Marandon,J. M. Martin,Olivier Martineau-Huynh,Alexandre Marcowith,David Maurin,T. J. L. McComb,M. C. Medina,R. Moderski,Emmanuel Moulin,M. Naumann-Godo,M. de Naurois,D. Nedbal,D. Nekrassov,Jacek Niemiec,S. J. Nolan,Stefan Ohm,J-F. Olive,E. de Oña Wilhelmi,E. de Oña Wilhelmi,K. J. Orford,Michał Ostrowski,M. Panter,M. Paz Arribas,G. Pedaletti,Guy Pelletier,P.-O. Petrucci,S. Pita,Gerd Pühlhofer,Michael Punch,Andreas Quirrenbach,B. C. Raubenheimer,Martin Raue,Martin Raue,S. M. Rayner,M. Renaud,M. Renaud,Frank M. Rieger,Frank M. Rieger,J. Ripken,L. Rob,L. Rolland,S. Rosier-Lees,Gavin Rowell,B. Rudak,Cameron B Rulten,J. Ruppel,V. Sahakian,Andrea Santangelo,Reinhard Schlickeiser,F. M. Schöck,R. Schröder,Ullrich Schwanke,S. Schwarzburg,S. Schwemmer,A. Shalchi,J. L. Skilton,Helene Sol,D. Spangler,Łukasz Stawarz,R. Steenkamp,C. Stegmann,G. Superina,Anna Szostek,P. H. Tam,J.-P. Tavernet,Regis Terrier,O. Tibolla,O. Tibolla,C. van Eldik,G. Vasileiadis,Christo Venter,L. Venter,J. P. Vialle,P. Vincent,M. Vivier,Heinrich J. Völk,F. Volpe,F. Volpe,F. Volpe,Stefan Wagner,Martin Ward,A. A. Zdziarski,A. Zech +168 more
TL;DR: A detailed study of the spectrum and variability of the source HESS J1745-290 in the Galactic Center (GC) region using new data from the H.E.S.S., with three-fold increase in statistics compared to previous work, a deviation from a simple power law spectrum is detected for the first time.