Zobrazeno 1 - 10
of 489
pro vyhledávání: '"V. Schönfelder"'
Autor:
V. Schönfelder, Jochen Greiner
Publikováno v:
The European Physical Journal H. 46
Gamma-ray astronomy has been one of the prime scientific research fields of the Max-Planck Institute for Extraterrestrial Physics (MPE) from its beginning. Over the years, the entire gamma-ray energy range accessible from space was explored. The purp
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Publikováno v:
Astronomy & Astrophysics. 443:477-483
We present results of the analysis of 1.275 MeV γ-ray line global distribution derived from the all-sky data accumulated by COMPTEL on board the Compton Gamma Ray Observatory (CGRO) from 1991 to 1997. Previously the 1.275 MeV γ-ray line was believe
Autor:
V. Schönfelder
Publikováno v:
Physik in unserer Zeit. 35:264-271
Das Gamma-Weltraumteleskop INTEGRAL der Europaischen Weltraumbehorde, ESA, hat in den ersten 15 Monaten seiner Mission eine Fulle interessanter, neuer Ergebnisse geliefert. Hauptinstrumente an Bord sind das hoch auflosende Spektrometer SPI und das Sp
Autor:
V. Schönfelder
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 525:98-106
Gamma-ray astronomy in the photon energy band from several 100 keV up to say 10 GeV can only be performed from space. Tremendous progress has been made in this young research field during the last 40 years. All-Sky maps exist now in continuum and lin
Autor:
G. Kanbach, Florian Schopper, Mark L. McConnell, Peter F. Bloser, Jürgen Knödlseder, V. Schönfelder, Stanley D. Hunter, G. DiCocco, Robert Andritschke, J. A. Ryan, Andreas Zoglauer, V. Reglero
Publikováno v:
New Astronomy Reviews. 48:275-280
We describe the development of a new telescope for Medium Energy Gamma-Ray Astronomy (MEGA) for the energy band 0.4–50 MeV. As a successor to COMPTEL and EGRET (low energies), MEGA aims to improve the sensitivity for astronomical sources by at leas
Autor:
V. Schönfelder
Publikováno v:
New Astronomy Reviews. 48:193-198
After COMPTEL on NASA’s Compton γ-ray observatory has opened the 1–30 MeV range as a new window to astronomy, large world-wide efforts are now being undertaken to develop the next generation of Compton telescopes. The history of the Compton tele
Publikováno v:
Astronomy & Astrophysics, 421, 983-990. EDP Sciences
We investigated the MeV properties of 173 unidentified or only tentatively identified EGRET sources listed in the third EGRET catalogue, by analyzing the simultaneously collected COMPTEL MeV data for each individual source. The sources can generally
Autor:
R. Diehl, J. Knödlseder, G. G. Lichti, K. Kretschmer, S. Schanne, V. Schönfelder, A. W. Strong, A. von Kienlin, G. Weidenspointner, C. Winkler, C. Wunderer
Publikováno v:
Astronomy & Astrophysics. 411:L451-L455
The precision measurement of the 1809 keV gamma-ray line from Galactic $^{26}$Al is one of the goals of the SPI spectrometer on INTEGRAL with its Ge detector camera. We aim for determination of the detailed shape of this gamma-ray line, and its varia
Autor:
G. Vedrenne, A. J. Dean, W. Hermsen, Niels Lund, Christoph Winkler, Bonnard J. Teegarden, Neil Gehrels, P. Ubertini, R. A. Sunyaev, J. A. Paul, A. Giménez, J. M. Mas-Hesse, V. Schönfelder, Thierry J.-L. Courvoisier, G. Di Cocco, Francois Lebrun, J. P. Roques, S. A. Grebenev, Giorgio G. C. Palumbo, Herbert W. Schnopper
Publikováno v:
Astronomy & Astrophysics. 411:L1-L6
The ESA observatory INTEGRAL (International Gamma-Ray Astrophysics Laboratory) is dedicated to the fine spectroscopy (2.5 keV FWHM @ 1 MeV) and fine imaging (angular resolution: 12 arcmin FWHM) of celestial gamma-ray sources in the energy range 15 ke