R
R. Walter
Researcher at University of Geneva
Publications - 124
Citations - 3978
R. Walter is an academic researcher from University of Geneva. The author has contributed to research in topics: Telescope & Neutron star. The author has an hindex of 38, co-authored 112 publications receiving 3700 citations.
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Journal ArticleDOI
Design and operation of FACT - the first G-APD Cherenkov telescope
H. Anderhub,Michael Backes,Adrian Biland,V. Boccone,Ilana M. Braun,Thomas Bretz,Franck Cadoux,V. Commichau,L. Djambazov,Daniela Dorner,Daniela Dorner,Sabrina Einecke,D. Eisenacher,A. Gendotti,Oliver Grimm,H. von Gunten,C. Haller,D. Hildebrand,U. Horisberger,B. Huber,K. S. Kim,M. L. Knoetig,J.-H. Köhne,T. Krähenbühl,B. Krumm,M. Lee,E. Lorenz,Werner Lustermann,Etienne Lyard,Karl Mannheim,Mohamed Tahar Meharga,K. Meier,Teresa Montaruli,D. Neise,Francesca Nessi-Tedaldi,A.-K. Overkemping,Aleksander Paravac,Felicitas Pauss,Dieter Renker,Wolfgang Rhode,M. Ribordy,Ulf Roser,J.-P. Stucki,J. Schneider,T. Steinbring,Fabian Temme,Julia Thaele,S. Tobler,G. Viertel,Patrick Vogler,R. Walter,K. Warda,Q. Weitzel,M. Zänglein +53 more
TL;DR: The first G-APT Cherenkov Telescope (FACT) as mentioned in this paper was designed to detect cosmic gamma-rays with energies from several hundred GeV up to about 10 TeV using the Imaging AtmosphericCherenkov Technique.
Journal ArticleDOI
Probing clumpy stellar winds with a neutron-star
TL;DR: In this article, a large fraction of the hard X-ray emission is emitted in the form of flares with a typical duration of 3 ksec, frequency of 7 days and luminosity of 1E36 ergs/s.
Journal ArticleDOI
The e-ASTROGAM mission: Exploring the extreme Universe with gamma rays in the MeV – GeV range
A. De Angelis,Vincent Tatischeff,M. Tavani,Uwe Oberlack,I. Grenier,Lorraine Hanlon,R. Walter,A. Argan,P. von Ballmoos,Andrea Bulgarelli,I. Donnarumma,M. Hernanz,Irfan Kuvvetli,M. Pearce,Andrzej A. Zdziarski,Alessio Aboudan,Marco Ajello,G. Ambrosi,Denis Bernard,Elisa Bernardini,V. Bonvicini,A. Brogna,M. Branchesi,Carl Budtz-Jørgensen,A. M. Bykov,Roberto Campana,M. Cardillo,Paolo De Coppi,D. de Martino,Roland Diehl,Michele Doro,Valentina Fioretti,Stefan Funk,Gabriele Ghisellini,Eric Grove,C. Hamadache,Dieter H. Hartmann,M. Hayashida,J. Isern,Gottfried Kanbach,J. Kiener,Jürgen Knödlseder,Claudio Labanti,P. Laurent,O. Limousin,Francesco Longo,Karl Mannheim,Martino Marisaldi,M. Martinez,Mn Mazziotta,Julie McEnery,Sandro Mereghetti,G. Minervini,A. A. Moiseev,A. Morselli,Koji Nakazawa,Piotr Orleanski,J. M. Paredes,B. Patricelli,J. Peyré,G. Piano,M. Pohl,Harald Ramarijaona,Riccardo Rando,I. Reichardt,M. Roncadelli,Rui M. Curado da Silva,Fabrizio Tavecchio,D. J. Thompson,Roberto Turolla,Roberto Turolla,A. Ulyanov,Andrea Vacchi,Xiaoya Wu,Andreas Zoglauer +74 more
TL;DR: The e-ASTROGAM (enhanced ASTROGAM) project as mentioned in this paper is a breakthrough Observatory space mission, with a detector composed by a Silicon tracker, a calorimeter, and an anticoincidence system, dedicated to the study of the non-thermal Universe in the photon energy range from 0.3 MeV to 3 GeV.
Journal ArticleDOI
The multiwavelength variability of 3C 273
Simona Soldi,Marc Türler,Stéphane Paltani,H. D. Aller,Margo F. Aller,G. Burki,Maria Chernyakova,Anne Lähteenmäki,Ian M. McHardy,E. I. Robson,Ruediger Staubert,Merja Tornikoski,R. Walter,Thierry J.-L. Courvoisier +13 more
TL;DR: In this article, the amplitude of the variations and the maximum variability time scales across the broad-band spectrum and correlate the light curves in different bands, specifically with the X-rays, to search for possible connections between the emission at different energies.
Journal ArticleDOI
Unveiling the nature of INTEGRAL objects through optical spectroscopy. V. Identification and properties of 21 southern hard X-ray sources
N. Masetti,Lorenzo Morelli,Eliana Palazzi,Gaspar Galaz,L. Bassani,Angela Bazzano,A. J. Bird,A. J. Dean,G. L. Israel,R. Landi,Angela Malizia,Dante Minniti,Filomena Schiavone,John B. Stephen,Pietro Ubertini,R. Walter +15 more
TL;DR: In this article, optical spectroscopic identification of the nature of 21 unidentified southern hard X-ray objects is reported in the framework of a campaign aimed at determining the nature and location of newly-discovered and/or unidentified sources detected by INTEGRAL.