NICMOS 2Gyro PSF-test

Details NICMOS 2Gyro PSF-test NICMOS 2Gyro PSF-test

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10446a&link_type=abstract

HST Proposal ID #10446

Computer Science

Hst Proposal Id #10446

Scientific paper

This proposal is aimed at analysing the NICMOS PSF under 2-gyro operations. For that we will observe the standard star P330E, which has been intensively observed since Cyle 7 and, therefore, it is a good reference to detect any possible deviation from 3-gyro operations. This proposal is largely based on the photometric monitoring calibration proposal {10381 and previous}. Changes with respect to that proposal include: 1- The patterns are repeated twice for NIC1, and 3 times for NIC2 in order to gain S/N and reduce intrapixel sensitivity. NIC3 observations {1 repeat} complete the last orbit. 2- For F110W observations the SCAMRR sequence is used instead of MCAMRR, in order to gain temporal resolution. 3- Filters F190N and F222M will not be observed with NIC3. The effects of jitter on these filters should be very small {and better detected with NIC2}. Intrapixel sensitivity variations induced by the jitter should be better studied at shorter wavelengths.

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