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

The Photodetector Array Camera and Spectrometer (PACS) on the HerschelSpace Observatory,10.1051/0004-6361/201014535,Astronomy & Astrophysics,Albrecht

The Photodetector Array Camera and Spectrometer (PACS) on the HerschelSpace Observatory   (Citations: 135)
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Albrecht Poglitsch, C. Waelkens, N. Geis, H. Feuchtgruber, B. Vandenbussche, L. Rodriguez, O. Krause, E. Renotte, C. van Hoof, P. Saraceno, J. Cepa, F. Kerschbaumhttp://academic.research.microsoft.com/io.ashx?type=5&id=12708940&selfId1=0&selfId2=0&maxNumber=12&query=
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 mum wavelength regime. In photometry mode, it simultaneously images two bands, 60-85 mum or 85-125 mum and 125-210 mum, 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 coverage of ~1500 km s-1 and a spectral resolution of ~175 km s-1. We summarise the design of the instrument, describe observing modes, calibration, and data analysis methods, and present our current assessment of the in-orbit performance of the instrument based on the performance verification tests. PACS is fully operational, and the achieved performance is close to or better than the pre-launch predictions. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.
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