NICMOS FOM Focus Test

Details NICMOS FOM Focus Test NICMOS FOM Focus Test

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7938n&link_type=abstract

HST Proposal ID #7938

Physics

Hst Proposal Id #7938

Scientific paper

This proposal is built to run a NIC3 focus sweep at absolute FOMY positions of 20 and 24 arcsec: given that the default FOM is now 16 arcsec, the FOM mechanism will be moved an additional 4 arcseconds in the first sweep {visit 1}, and an additional 8 arcseconds in the second sweep {visit 2}. The sweeps will move the PAM mechanism from +6.5mm to -9.5mm {The PAM nominal position must first be moved to mechanical 0.0 from it's default mechanical PAM3 setting of -9.5mm to avoid exceeding PAM travel limits of + and - 9664 steps}. A tilt grid sweep will be performed in Visit 3. The PAM will be tilted by +/-8 steps in 2 diagonally-offset 3x3 grids around the PAM "best tilt" position in NIC3 at PAM focus -9.5mm and FOMY position 24 arcsec. The quality of the stellar psf's will be checked to determine optimal PAM tilt values for this FOM and focus setting. This proposal should be scheduled to run AS SOON AS POSSIBLE before 21-MAR-98. Objectives: a} Cover sufficient region of PAM focus space to ensure the optimal locations are included. {NIC3 encircled energy and phase retrieval will be done.} b} Measure image quality at different FOM positions. c} Determine best xtilt, ytilt for FOMY 24 arcsec at current best PAM focus of -9.5mm.

Affiliated with

Also associated with

No associations

Rating

NICMOS FOM Focus Test does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with NICMOS FOM Focus Test, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and NICMOS FOM Focus Test will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-896445