Partly based on observations obtained at the European Southern Observatory, Paranal, Chile, within the observing programs 164.I-0605 and 69.C-0441.

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This work is based in part on archival data obtained with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA.

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...(Alexander et al. 2003)

Partly based on observations with ISO, an ESA project with instruments funded by ESA Member States (especially the PI countries: France, Germany, the Netherlands and the UK).

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