Highlights from the first year of Odin observations

A Hjalmarson, U Frisk, M Olberg, P Bergman, P Bernath, N Biver, J H Black, R S Booth, V Buat, J Crovisier, C L Curry, M Dahlgren, P J Encrenaz, E Falgarone, P A Feldman, M Fich, H G Floren, M Fredrixon, M Gerin, E M GregersenM Hagstrom, J Harju, T Hasegawa, C Horellou, L E B Johansson, E Kyrola, S Kwok, B Larsson, A Lecacheux, T Liljestrom, M Lindqvist, R Liseau, E J Llewellyn, K Mattila, G Megie, G F Mitchell, D Murtagh, L A Nyman, H L Nordh, A O H Olofsson, G Olofsson, H Olofsson, L Pagani, G Persson, R Plume, H Rickman, I Ristorcelli, G Rydbeck, A Sandqvist, F von Scheele, G Serra, S Torchinsky, N F Tothill, K Volk, T Wiklind, C D Wilson, A Winnberg, G Witt

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Key Odin operational and instrumental features and highlights from our sub-millimetre and millimetre wave observations of H2O, (H2O)-O-18, NH3, (NH3)-N-15 and O-2 are presented, with some insights into accompanying Odin Letters in this A& A issue. We focus on new results where Odin's high angular resolution, high frequency resolution, large spectrometer bandwidths, high sensitivity or/and frequency tuning capability are crucial: H2O mapping of the Orion KL, W3, DR21, S 140 regions, and four comets; H2O observations of Galactic Centre sources, of shock enhanced H2O towards the SNR IC443, and of the candidate infall source IRAS 16293-2422; (H2O)-O-18 detections in Orion KL and in comet Ikeya-Zhang; sub-mm detections of NH3 in Orion KL (outflow, ambient cloud and bar) and rho Oph, and very recently, of (NH3)-N-15 in Orion KL. Simultaneous sensitive searches for the 119 GHz line of O-2 have resulted in very low abundance limits, which are difficult to accomodate in chemical models. We also demonstrate, by means of a quantitative comparison of Orion KL H2O results, that the Odin and SWAS observational data sets are very consistently calibrated.

Original languageEnglish
Pages (from-to)L39-L46
Number of pages8
JournalAstronomy & Astrophysics
Issue number3
Publication statusPublished - May 2003


  • radio lines : ISM
  • ISM : molecules
  • space vehicles : instruments
  • submillimeter
  • techniques : spectroscopic
  • telescopes
  • IRAS 16293-2422
  • W3 CORE
  • IRAS-16293-2422

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