WFC3 IR PSF Evaluation in Thermal-Vacuum Test #3

Details WFC3 IR PSF Evaluation in Thermal-Vacuum Test #3 WFC3 IR PSF Evaluation in Thermal-Vacuum Test #3

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008wfc..rept...41h&link_type=abstract

Instrument Science Report WFC3 2008-41, 10 pages

Computer Science

Performance

Hubble Space Telescope, Hst, Space Telescope Science Institute, Wfc3, Wide Field Camera 3, Thermal Vacuum Test

Scientific paper

We have assessed the image quality of the WFC3 IR channel in a flight-like thermal vacuum environment, and with its flight detector installed. Point source measurements at 16 field positions and three wavelengths indicate good imaging performance for the IR channel. Encircled energies meet expectations over the field, with CASTLE stimulus illumination, when reasonable contributions from detector effects are accounted for. Models including the HST OTA indicate that the on-orbit EE will likely meet all specifications at 1 μ, but that the PSF core EE at 1.6 μ may not reach the spec level, although the specs at larger diameters will readily be met.

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