COS Instrument Handbook for Cycle 24
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Cosmic Origins SpectrographInstrument Handbook for Cycle 24 > Chapter 2: Special Considerations for Cycle 24 > 2.4 Spectroscopic Use of the Bright Object Aperture

2.4
Spectroscopic observations with the BOA have had very little demand over the past cycles. For that reason, it has been decided that spectroscopic observations with the BOA will not be supported at the level that is used for the PSA. Spectroscopic observations with the BOA should be performed only if the technical requirement and scientific justification are particularly compelling. Proposers should be aware of the following caveats regarding use of the BOA:
Cycle 24 Phase I proposals that include spectroscopic use of the BOA must include a justification of why the science cannot be done with the PSA.

Cosmic Origins SpectrographInstrument Handbook for Cycle 24 > Chapter 2: Special Considerations for Cycle 24 > 2.4 Spectroscopic Use of the Bright Object Aperture

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