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22461Dramatic fading of ISON's molecular emission lines

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  • Michal Drahus
    Nov 25, 2013
      Hi All,

      Comet ISON has been closely monitored at the IRAM millimeter telescope in
      Spain by Israel Hermelo (IRAM Granada) and myself (Caltech/NRAO) for the
      last 6 days. We observe consistent, rapid fading of the molecular emission
      lines between Nov. 21 and Nov. 25 by at least a factor of 20 (likely
      more). This may indicate that the nucleus is now at best marginally active
      or that... it no longer exists.

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