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Hubble Space Telescope
WFPC2 CTE Estimation Tool
for Point Sources - 1

The correction formulae for this CTE tool were taken from Andrew Dolphin's website (09/17/2002 version), where they are described in detail. Further information can also be found in the help file. The CTE loss is expressed in magnitudes. The input counts and background are expected in electrons.

MJD of Observation:

Measured Source Counts: (electrons).

X-Position on CCD: (Pixels).

Y-Position on CCD: (Pixels).

Background Counts: (electrons).

Stellar Magnitude: (magnitude).


For detailed information on CTE and its effects, see: