The Photodetector Array Camera and Spectrometer (PACS) on the  Herschel Space Observatory

The Photodetector Array Camera and Spectrometer (PACS) is one of the three science instruments on ESA's far infrared and submillimetre observatory. It employs two Ge:Ga photoconductor arrays (stressed and unstressed) with 16×25 pixels, each, and two filled silicon bolometer arrays with 16×32 and 32×64 pixels, respectively, to perform integral-field spectroscopy and imaging photometry in the 60–210 μm wavelength regime. In photometry mode, it simultaneously images two bands, 60–85 μm or 85–125 μm and 125–210 μm, over a field of view of ~1.75'× 3.5', with close to Nyquist beam sampling in each band. In spectroscopy mode, it images a field of 47” × 47”, resolved into 5×5 pixels, with an instantaneous spectral…

• NA
  National Aeronautics and Space Administration
• CN
  Centre National d’Etudes Spatiales
• KL
  KU Leuven
• BF
  Bundesministerium für Verkehr, Innovation und Technologie
• MF
  Max-Planck-Institut für Astronomie