2.8 STIS Snapshot and Survey Program Policies
Both imaging and spectroscopic STIS/MAMA snapshots and survey programs are allowed, but the combined total of STIS/MAMA and COS snapshot and survey targets accepted in Cycle 17 will not exceed 300, with imaging targets limited to a total of 100, due to the target and field bright object checking requirements. Moving targets are not permitted for STIS/MAMA snapshot or survey visits. Variable STIS/MAMA snapshot and survey targets must have well defined maximum UV fluxes, which will be used for the bright object checking. There are no restrictions on the numbers or variability of proposed STIS/CCD snapshot and survey targets, as they do not require bright object checking and have a significantly higher expected completion rate. Thus, use of the STIS/CCD G230LB or G230MB gratings is encouraged as an alternative to the NUV-MAMA.
In addition, STIS/MAMA snapshot and survey proposals should be limited to one or a few straightforward configurations. Specifically, use of the F25NDQ filters will not be allowed in MAMA snapshot or survey proposals. Use of the 0.2X0.2 echelle aperture is recommended for first-order programs without a scientific need for a long-slit in order to expedite the field bright object screening process; these configurations will be supported as of Cycle 17. Because of the limited resources available for bright object checking combined with the relatively low expected completion rate, excessively complex STIS/MAMA snapshot and survey targets, fields, or instrumental configurations may not be implemented in Phase II. If you are in doubt on this issue, you may consult with a member of the STIS Team via the Help Desk.
