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| Paper: |
A Test for Weak Cosmic Ray Events on CCD Exposures |
| Volume: |
77, Astronomical Data Analysis Software and Systems IV |
| Page: |
507 |
| Authors: |
Bland-Hawthorn, J.; Serjeant, S.; Shopbell, P. L. |
| Abstract: |
It is notoriously difficult to identify weak cosmic ray events in long exposure observations. The majority of ``de-glitch" programs have little difficulty in identifying the bright events. The faint events---either individual or ``splatter'' around bright events---are rather more problematic. We propose a simple test to evaluate the effectiveness of a de-glitch program in removing weak events. The method is to compare the probability distribution function (PDF) of cosmic ray events between an observation and a dark frame matched in exposure time. We illustrate the basic idea using dark exposures from a Tek 1024times 1024 CCD with varying exposure lengths and read-out times. |
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