LUCIFER Linearization Calibrations

A complete set of linearization data samples from near zero counts up to saturation on the detector, and takes measurements to demonstrate that the lamp is stable and quantify how much persistence affects the results. A fundamental assumption in the analysis is that the lamp is stable, but it does not matter if the lamp uniformly illuminates the field of view or not as that is normalized out. You want the ramp of exposure times to provide sufficient data points for each pixel that a second-order polynomial fit will be oversampled even after clipping out bad data (e.g. cosmic rays) and truncating the dataset short of saturation where things become un-recoverably non-linear.

UT 2012 March 18 with the new detector
Script: /home/observer/LBTO/SciencePrep/Linearity/lin_o2dcr_2012038 (edit for filter change)
Files: luci.20120318.*

Image # ROEmode Filters Lamp Comments
0001 - 0034 O2DCR clear+J Halo3 Saturated by 30s, aborted, detector flushed 25x
0035 - 0128 O2DCR Y1+clear Halo3 750-5600 ADU
0129 - 0222 O2DCR clear+J Halo3 7800-Sat'd ADU, All Qs show saturation
0223 - 0308 O2DCR J_low+clear Halo3 3000-56000 ADU

-- DavidThompson - 18 Mar 2012
Topic revision: r1 - 18 Mar 2012, DavidThompson
This site is powered by FoswikiCopyright © by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding Foswiki? Send feedback