- [*] Residual Bias Removal in HST NICMOS Images
- Bushouse H., Dickinson M., van der Marel R.P.
- in `Astronomical Data Analysis Software and Systems IX',
Manset N., Veillet C., Crabtree D., eds.,
ASP Conference Series, Vol. 216, p. 531-534, 2000
- © 2000. Astronomical Society of the Pacific.
All Rights Reserved.
Software tools have been developed to allow observers to examine and
correct NICMOS images for the presence of residual bias signal. The
NICMOS detector bias can drift between and during exposures, due to
small changes in temperature. Subtraction of a standard calibration
frame can therefore leave residual bias signal, which then results in
the presence of a flatfield imprint in processed images. Correction
routines have been developed that determine the residual bias signal
by iteratively solving for the signal level that minimizes the
Return to my bibliography.
Return to my home page.
Last modified March 30, 2001.
Roeland van der Marel,