FOC Observations during Coma Sweep

Details FOC Observations during Coma Sweep FOC Observations during Coma Sweep

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990hst..prop.3405j&link_type=abstract

HST Proposal ID #3405

Physics

Hst Proposal Id #3405

Scientific paper

This proposal will perform observations through filters F486N and F120M in F/96 mode at two settings of the OTA secondary mirror. The settings are designed to search for the zero-coma decenter position. Existing data have identified a nominal "zero coma" position, which will be the first setting. The second will be opposite in decenter to the nominal Day323 position from the zero coma position, i.e. it will have the opposite coma from the D323 position. The sequence should be performed at each OTA setting. The exposure with F486N filter and no ND's is to expose the pads satisfactorily. The core of the PSF will be saturated. The exposure with ND's is to allow an independent phase retrieval measurement. The exposure with the F120M filter is to check the UV image quality. After the initial acquisition and realtime uplink to move the star to the center of the field, each sequence should take 2 orbits.

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