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  • BASECOM - The Nançay Cometary Database

    Since 1973, the 18-cm lines of the OH radical have been systematically observed in a number of comets with the Nançay radio telescope. This allowed an evaluation of the cometary water… production rates and their evolution with time, as well as a study of several physical processes: the excitation mechanisms of the OH radio lines, the expansion of the cometary atmospheres, their anisotropy in relation with non-gravitational forces, the Zeeman effect in relation with the cometary magnetic field. The Nançay observations of 53 cometary apparitions between 1982 and 2009 are now organized in this database.

    Creators: Jacques Crovisier
    Contributors: Mathieu Hirtzig, PADC
    Publisher: Paris Astronomical Data Centre - LESIA

  • granule_uid dataproduct_type target_name time_min (d) time_max (d) access_url granule_gid obs_id target_class time_sampling_step_min (s) time_sampling_step_max (s) time_exp_min (s) time_exp_max (s) spectral_range_min (Hz) spectral_range_max (Hz) spectral_sampling_step_min (Hz) spectral_sampling_step_max (Hz) spectral_resolution_min (Hz) spectral_resolution_max (Hz) c1min (deg) c1max (deg) c2min (deg) c2max (deg) c3min c3max s_region c1_resol_min (deg) c1_resol_max (deg) c2_resol_min (deg) c2_resol_max (deg) c3_resol_min c3_resol_max spatial_frame_type incidence_min (deg) incidence_max (deg) emergence_min (deg) emergence_max (deg) phase_min (deg) phase_max (deg) instrument_host_name instrument_name measurement_type access_format access_estsize (kbyte) processing_level publisher bib_reference service_title release_date creation_date modification_date target_region species alt_target_name tperihelion dsun0 (au) comettype obsqual status tepoch tstart tend freq (Hz) pola dgeo (au) dsun (au) rdot (km/s) inv1 inv2 tbg (K) line_area ( aerr ( slin (mJy) serr (mJy) vo (km/s) voerr (km/s) dvo (km/s) dvoerr (km/s) q1oh q1err q2oh q2err file_name ra (deg) offra (deg) dec (arcmin) offdec (arcmin) snr thumbnail_url
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    SELECT * FROM basecom.epn_core

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