|STIS Instrument Handbook for Cycle 25|
Below, we provide a checklist for observers filling out Phase II proposals. You should do the following prior to submitting your program.
• Specify your coordinates (especially for spectroscopic observations) in the Guide Star reference frame. Be sure to specify the coordinate source used. If your target has significant proper motion, be sure to also include this information in the appropriate fields in the Phase II proposal file. Check that the units of the proper motion are correct, and that the epoch specified is consistent with the coordinates supplied.
• Specify accurate V magnitude, fluxes, spectral type, and colors for your target. This is required for MAMA targets to allow for bright object checking. If you are using the MAMAs and have UV photometry (e.g., from GALEX) for your target, provide it.
• Specify accurate V magnitude, fluxes, spectral type, and colors for your target. This is required for MAMA targets to allow for bright object screening.
• Specify any needed orientation and/or timing requirements. To facilitate scheduling, please provide the broadest possible ranges for these requirements that are consistent with your scientific needs. If multiple ORIENTs are possible, please include the alternatives.
• Verify the correct usage (i.e., direction) of your PATTERN optional requirement or POS-TARGs (if used).
• CR-SPLIT CCD exposures, as appropriate. Keep individual exposure times < 1000 s if possible to avoid excessive cosmic ray events.
• Add fringe-flat exposures for G750L and G750M observations at λ > 7500 Ĺ.
• For TIME-TAG observations, verify the value for BUFFER-TIME.
• Consider the use of stepping along the slit for first-order modes or the use of FP-SPLIT slits for echelle modes, when high signal-to-noise is required.
• For faint objects, consider using the D1 pseudo-apertures to mitigate the FUV-MAMA dark current.