Report on the Workshop on Deep Impact as a World Observatory Event (held in Brussels, Belgium, 7-10 August 2006)

Details Report on the Workshop on Deep Impact as a World Observatory Event (held in Brussels, Belgium, 7-10 August 2006) Report on the Workshop on Deep Impact as a World Observatory Event (held in Brussels, Belgium, 7-10 August 2006)

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006msngr.126...48k&link_type=abstract

The Messenger, vol. 126, p. 48-49

Astronomy and Astrophysics

Astronomy

1

Scientific paper

In the context of NASA's Deep Impact space mission, Comet 9P/Tempel1 has been at the focus of an unprecedented worldwide long-term multi-wavelength observation campaign. The comet has been studied through its perihelion passage by various spacecraft including the Deep Impact mission itself, HST, Spitzer, Rosetta, XMM and all major ground-based observatories in basically all wavelength bands used in astronomy, i.e. from radio cm-waves to X-rays. For some ‘glossy-print' information please have a look to e.g. ESO's dedicated web-pages (deepimpact.eso.org). Due to the dynamical and other technical constraints of the space mission, ESO's telescopes could not observe the moment of impact - the comet was indeed exactly setting on the western horizon. However, the ESO observatory sites, La Silla and Paranal were more or less the worldwide hub of the mid- and long-term ground-based observations for monitoring. Predictions for cometary activity induced by the experiment made before the impact ranged from ‘very little' to the instantaneous release of material equivalent to ~ 10 days of normal activity of the comet close to perihelion. In summary, Mike A'Hearn, the PI of Deep Im-pact, confirmed in his review talk, that the release was at the lower end of expectations and that there was no activity of the impact site induced after the crater had formed. Especially as the long-term signatures after impact were rather subtle, the use of the world's best facilities to document the event was well warranted in retrospect.

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