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Sökning: WFRF:(Hagström Magne)

  • Resultat 1-7 av 7
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1.
  • Andersson, Christer, 1948, et al. (författare)
  • Radioastronomy for students
  • 2005
  • Ingår i: International Amateur-Professional Photoelectric Photometry Communications, Proceedings of `Global Hands-On Universe 2004", St. Petersburg, Russia, July 2004. ; 100, s. 49-54
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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2.
  • Frisk, U., et al. (författare)
  • The Odin satellite - I. Radiometer design and test
  • 2003
  • Ingår i: Astronomy and Astrophysics. - 0004-6361 .- 1432-0746. ; 402:3, s. L27-L34
  • Tidskriftsartikel (refereegranskat)abstract
    • The Sub-millimetre and Millimetre Radiometer (SMR) is the main instrument on the Swedish, Canadian, Finnish and French spacecraft Odin. It consists of a 1.1 metre diameter telescope with four tuneable heterodyne receivers covering the ranges 486-504 GHz and 541-581 GHz, and one fixed at 118.75 GHz together with backends that provide spectral resolution from 150 kHz to 1 MHz. This Letter describes the Odin radiometer, its operation and performance with the data processing and calibration described in Paper II.
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5.
  • Larsson, Bengt, et al. (författare)
  • Molecular oxygen in the rho Ophiuchi cloud
  • 2007
  • Ingår i: Astronomy & Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 466:3, s. 5-
  • Tidskriftsartikel (refereegranskat)abstract
    • Context: Molecular oxygen, O2, has been expected historically to be an abundant component of the chemical species in molecular clouds and, as such, an important coolant of the dense interstellar medium. However, a number of attempts from both ground and from space have failed to detect O2 emission.Aims: The work described here uses heterodyne spectroscopy from space to search for molecular oxygen in the interstellar medium. Methods: The Odin satellite carries a 1.1 m sub-millimeter dish and a dedicated 119 GHz receiver for the ground state line of O2. Starting in 2002, the star forming molecular cloud core ρ Oph A was observed with Odin for 34 days during several observing runs.Results: We detect a spectral line at v_LSR =+3.5 km s-1 with Δ v_FWHM=1.5 km s-1, parameters which are also common to other species associated with ρ Oph A. This feature is identified as the O2 (NJ = 11 - 1_0) transition at 118 750.343 MHz.Conclusions: The abundance of molecular oxygen, relative to H{2} , is 5 × 10-8 averaged over the Odin beam. This abundance is consistently lower than previously reported upper limits.Based on observations with Odin, a Swedish-led satellite project funded jointly by the Swedish National Space Board (SNSB), the Canadian Space Agency (CSA), the National Technology Agency of Finland (Tekes) and Centre National d'Étude Spatiale (CNES). The Swedish Space Corporation has been the industrial prime contractor and also is operating the satellite. Appendix A is only available in electronic form at http://www.aanda.org
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7.
  • Risacher, C., et al. (författare)
  • A 279-381 GHz SIS Receiver for the APEX Telescope
  • 2006
  • Ingår i: Proceedings of the 16th International Symposium on Space Terahertz Technology, Chalmers University of Technology, Gothenburg, Sweden, May 2-4, 2005. ; , s. 432-437
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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  • Resultat 1-7 av 7
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refereegranskat (3)
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HAGSTRÖM, MAGNE, 194 ... (6)
Booth, Roy, 1938 (4)
Olberg, Michael, 195 ... (4)
Fredrixon, Mathias, ... (4)
Pantaleev, Miroslav, ... (3)
Monje, Raquel, 1979 (2)
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Belitsky, Victor, 19 ... (2)
Vassilev, Vessen, 19 ... (2)
Haas, Rüdiger, 1966 (2)
Meledin, Denis, 1974 (2)
Sundin, Erik, 1979 (2)
Elgered, Gunnar, 195 ... (2)
Lapkin, Igor, 1963 (2)
Ferm, Sven-Erik, 196 ... (2)
Bergman, Per, 1960 (2)
Olofsson, Henrik, 19 ... (2)
Zimmermann, R. (1)
et al., (1)
Black, John H, 1949 (1)
Zirath, Herbert, 195 ... (1)
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Rouaix, G. (1)
Liseau, René, 1949 (1)
Horellou, Cathy, 196 ... (1)
Ristorcelli, I. (1)
Tuovinen, J. (1)
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Andersson, S (1)
Larsson, Bengt (1)
Rickman, Hans (1)
Olofsson, G. (1)
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Olofsson, Hans, 1952 (1)
Sjoberg, F (1)
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Olofsson, Göran (1)
Andersson, Christer, ... (1)
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Haas, R. (1)
Murtagh, Donal, 1959 (1)
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von Schéele, Fredrik (1)
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Nilsson, Tobias, 197 ... (1)
Stenmark, L (1)
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