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Hubble Space Telescope
WFPC2 ISR Abstract

Instrument Science Report 2001-09:

The WFPC2 Photometric CTE Monitor

I. Heyer

October 05, 2001


The Charge Transfer Efficiency of the WFPC2 CCD arrays has been monitored since the instrument's deployment aboard HST in 1993. Since then a significant increase in CTE loss has been observed.

We examine photometric data from 28 April 1994 to 11 February 2001. The CTE loss appears to be growing worse in a linear fashion with time. The results from the latest set of observations show that CTE loss has reached a level of 53% in the worst case scenario.

The Complete Paper is available as PDF (0.39 MB) and PostScript (1.1 MB).