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COS Instrument Handbook
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Cosmic Origins SpectrographInstrument Handbookfor Cycle 20 > Chapter 12: The COS Calibration Program > 12.5 Cycle 18 Calibration Program

The Cycle 18 calibration program continued the calibration and monitoring observations performed in Cycle 17, including long-term programs to monitor the sensitivity and wavelength scale of both the NUV and FUV detectors. Brief descriptions of these programs are presented in Table 12.3.
Table 12.3: Cycle 18 Calibration Program
List of exposures on the COS Web site that GOs may use to model and subtract Ly α
Decision on change of voltage or lifetime position

Coordinated parallel with a STIS calibration program.

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