Temperature Dependent Dark Reference Files: Linear Dark and Amplifier Glow Components

Details Temperature Dependent Dark Reference Files: Linear Dark and Amplifier Glow Components Temperature Dependent Dark Reference Files: Linear Dark and Amplifier Glow Components

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009nicm.rept....2d&link_type=abstract

Instrument Science Report NICMOS 2009-002, 13 pages

Computer Science

Hubble Space Telescope, Hst, Space Telescope Science Institute, Nicmos

Scientific paper

This report describes the investigation of the temperature dependence of the linear dark and amplifier glow components of the NICMOS temperature dependent *_tdd.fits dark reference files in the post-NCS era, 2002-2008. We find a significant temperature dependence of the amplifier glow signal with higher counts at higher temperature when using the bias-derived detector temperature. The linear dark should also be dependent on temperature, however, the expected change in dark current should to be smaller than the scatter introduced from the read noise. This is consistent with what we find. We also describe how the calnica reduction software uses the temperature dependent dark components when calibrating NICMOS images.

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