WFC3/UVIS Charge Injection Behavior: Results of an Initial Test

Details WFC3/UVIS Charge Injection Behavior: Results of an Initial Test WFC3/UVIS Charge Injection Behavior: Results of an Initial Test

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011wfc..rept....2b&link_type=abstract

WFC3 Instrument Science Report 2011-02, 11 pages

Computer Science

Hubble Space Telescope, Hst, Space Telescope Science Institute

Scientific paper

The WFC3 CCD Charge Injection (CI) capability has been tested on-orbit in Cycle18 calibration program 12348. Bias, dark, and science exposures of star cluster NGC 104 have been obtained in all commandable CI modes. Super-bias images were constructed for each CI mode and used to calibrate the NGC 104 exposures. Analysis has shown that the CI mode is working as expected, producing injected signals of ~15000 e-/pix. The CI signal is stable and repeatable to a level of a few e-/pix. CI rows in calibrated science images have mean residual signals of a few e-/pix with 1-sigma noise of ~18 e-/pix. Noise in science images in the rows in between CI varies from 3.5-6.5 e-/pix, compared to ~3.4 e-/pix in non-CI images.

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