Computer Science – Performance
Scientific paper
Mar 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989msngr..55...52b&link_type=abstract
The Messenger, vol. 55, p. 52-55
Computer Science
Performance
Data Processing: Ccd Observations
Scientific paper
In the Messenger No. 51 (p. 12-15), an attempt to use the GES for radioactive chronometry of the Galaxy was described. Two instrumental aspects of the observations were noted as being not yet under adequate control: (i) The determination in detail of the instrumental profile, the wings of which cannot be determined weil, except at laser line wavelengths, and the shape of which is found to depend on the often variable focus across the array detector format, and at least sometimes on the signal level in the detector used. (ii) The markedly asymmetrical distribution of the noise from the Reticon detector (caused by energetic particle detections) for low flux levels and integrations of an hour and longer. Treatment of the data in an optimum way is problematical due to these effects, and although the CES remains one of the world's best instruments of its type, study of such deficiencies can be expected to improve its Performance significantly.
Butcher Harvey
Schoenmaker Ton
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