Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/calibration/documentation/CALHB/node905.html
Дата изменения: Tue Sep 20 19:45:21 2011
Дата индексирования: Mon Apr 11 03:58:58 2016
Кодировка:

Поисковые слова: arp 220
Combination of the selected observations to make the templates and build CCFs

Calibration Access and Data Handbook


next up previous contents
Next: References Up: Maintenance procedures Previous: SAS processing   Contents

Combination of the selected observations to make the templates and build CCFs

This step is done mostly interactively and uses some basic ad-hoc IDL procedures, mainly for testing and checking of the consistency of the results.Once the observations have been selected and the count spectra extracted, the available spectra of each background level are accumulated. The combined spectrum is built as follows

Add COUNTS
Average BACKSCAL
Average AREASCAL
Average QUALITY such that QUALITY=0|1
Exposure times are added and the total is written in the EXPOSURE keyword of the header of the output FITS file. Finally, the CCFs are built from these templates.



Michael Smith 2011-09-20