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Instrument modes and AOTs
Two different observation schemes are offered with the PACS spectrometer:
line and range spectroscopy.
| PACS spectrometer AOTs. |
Line Scan Spectroscopy Mode A limited number of relatively narrow emission/absorption lines can
be observed for either a single spectroscopic FOV (0.78' x 0.78') or for a larger map. Background
subtraction is achieved either through standard chopping/nodding, for faint/compact
sources, or through 'frequency-switching' techniques for line measurement of the grating mechanism
of bright extended sources. There are two different AOTs in this mode:
- Line Scan Spectroscopy with chopping-nodding
- Line Scan Spectroscopy with wavelength switching
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| Range Spectroscopy Mode A freely defined wavelength range is scanned by stepping through
the respective angles of the grating, synchronized with the chopper. Both arrays will are used at
a time. |
"PACS Observer's Manual" is the reference manual for PACS observers and the Herschel Observation Planning Tool
is the Herschel-Spot (HSpot) User's Guiden.
Credits
The contents of this page are based on the PACS observer's Manual produced by
Bruno Altieri, Roland Vavrek and the PACS Instrument Control Centre
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