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Title:
Serendipitous Occultation of U0975-07195164 by 9P/Tempel 1 Witnessed from LaSilla
Authors:
Käufl, H. U.; Saviane, I.; Ivanov, V.; Bonev, T.; Boehnhardt, H.
Affiliation:
AA(European Southern Observatory), AB(European Southern Observatory), AC(European Southern Observatory), AD(Astronomical Institute of the Bulgarian Academy of Sciences), AE(MPI for Solar System Research, Max-Planck-Str. 2)
Publication:
Deep Impact as a World Observatory Event: Synergies in Space, Time, and Wavelength, Eso Astrophysics Symposia, Volume . ISBN 978-3-540-76958-3. Springer Berlin Heidelberg, 2009, p. 185
Publication Date:
00/2009
Origin:
SPRINGER
DOI:
10.1007/978-3-540-76959-0_23
Bibliographic Code:
2009diwo.conf..185K

Abstract

Comet 9P/Tempel 1 was systematically monitored by ESO after re- appearance in January 2005. Routinely various narrow-band filters in the 10 &mbreve;um window were used with TIMMI2 at ESO's 3.6 m telescope. Quasi-simultaneously, the comet was also observed with an R-band filter from ESO's 3.5 m NTT. In the February 2005 period, the comet happened to pass accidentially rather close to a reasonably bright field star, unfortuately in non-photometric conditions. The NTT observing set-up was immediately changed from optical imaging to low-resolution spectroscopy, so that the reddening of the stellar light of this star by the inner coma could be measured with high precision. In combination with the thermal-IR data this may help for unique constraints on the dust particle size distibution as well as for the optical constants of the dust.
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