Cosmic Origins Spectrograph Instrument Handbook for Cycle 17

11.5 Recap of COS Optional Parameters

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Most of the parameters to be specified in Phase II are self-evident, such as COS/FUV, or TIME-TAG, the Config and Mode, respectively. Here we provide cross-references to discussions of the various Optional Parameters than can be specified.

BUFFER-TIME

Used with TIME-TAG mode. See TIME-TAG mode.

CENTER

Used in ACQ/SEARCH and ACQ/PEAKD. See "Finding the source" on page 95 and "PEAKD: Peaking up in the along-dispersion direction" on page 98.

EXTENDED

Indicates an extended source for the data reduction pipeline. Used in TIME-TAG and ACCUM modes. See EXTENDED.

FLASH

Used in TIME-TAG mode only. See What "TAGFLASH" does during TIME-TAG observations.

FP-POS

Used in TIME-TAG and ACCUM modes. See Achieving Higher Signal-to-noise.

NUM-POS

Used in ACQ/PEAKD. See "PEAKD: Peaking up in the along-dispersion direction" on page 98.

SCAN-SIZE

Used in ACQ/SEARCH. See "Mode=ACQ: The spiral target search" on page 95.

SEGMENT

Selects segment A, segment B, or both in the FUV channel. Used in ACQ/SEARCH, ACQ/PEAKXD, and ACQ/PEAKD, as well as TIME-TAG and ACCUM. See Single segment usage.

STEP-SIZE

Used in ACQ/SEARCH and ACQ/PEAKD. See "Mode=ACQ: The spiral target search" on page 95 and "PEAKD: Peaking up in the along-dispersion direction" on page 98.

STRIPE

Used in ACQ/PEAKXD in the NUV channel. Selects one of the three stripes for the process. See "PEAKXD: Peaking up in the cross-dispersion direction" on page 97.