The Photoconductor Array Camera Spectrometer (PACS) for the Far Infrared and Submillimetre Telescope (FIRST)

摘要

The Photoconductor Array Camera & Spectrometer (PACS) is one of the three science instruments for ESA's Far Infra-Red and Submillimetre Telescope (FIRST). IT employs two 16 x 25 pixels Ge:Ga photoconductor arrays (stressed/unstressed) to perform imaging photometry and imaging line spectroscopy in the 60 - 210 mu m wavelength band. In photometry mode, it will simultaneously image two bands, 60 - 90 or 90 - 130 mu m and 130 - 210 mu m, over fields of view of approx 1' x 1.5' and approx 2' x 3', respectively,w ith full beam sampling in each band. In spectroscopy mode, it will image a field of approx 50" x 50", resolved into 5 x 5 pixels, with an instantaneous spectral coverage of approx 1500km/s and a spectral resolution of approx 175km/s. In both modes background-noise limited peformance is expected, with sensitivities (5sigma in 1h) of 4 - 6 mJy or 2 - 8 x 10~(-18)W/m~2, respectively.