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Cosmic Origins SpectrographInstrument Handbookfor Cycle 22 > Chapter 13: Spectroscopic Reference Material > 13.3 Gratings

13.3
For each COS grating, we present the resolving power, dispersion, plate scale, the wavelength range covered at each central wavelength setting and FP-POS position, sensitivities, effective areas, and a tool for estimating S/N. Advice on use is provided where appropriate.
Note that the quoted sensitivities are estimates for mid-Cycle 22 (April 2015). The COS ETC will be updated as the instrumental sensitivity evolves. Users should be aware that the BOA is not well calibrated below 1200 .
 
Wavelengths in this handbook, and in COS data products, are always measured in vacuum.
 
Gratings:

Cosmic Origins SpectrographInstrument Handbookfor Cycle 22 > Chapter 13: Spectroscopic Reference Material > 13.3 Gratings

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