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: http://xmm.vilspa.esa.es/sas/6.5.0/doc/esrcselect/node3.html
Дата изменения: Tue Aug 16 04:12:52 2005 Дата индексирования: Sat Dec 22 12:06:32 2007 Кодировка: Поисковые слова: vallis |
The task esrcselect will make the decision on which sources are candidates for source product generation. The task accepts two sources lists: the observation source list and the exposure source list. The positions used to define source and background regions are drawn from the exposure-level source list.
The source selection criteria may differ depending on whether a spectrum or a time-series is to be produced, which is specified using the operationmode parameter. Currently there are no differences in the selection criteria, the operation mode merely defines which column in the observation source list will be updated to reflect the production of products.
The conditions for the selection of a source are currently anticipated to be:
Additional conditions may be necessary; these will be added as needed after in-flight experience has been gained (see section 10).
For some instrument configurations (eg. observations including windowed or timing modes) sources in the observation source list may not have a counterpart in the exposure source list. In such cases the source will not be selected for source product generation.
The output from the task is a list of the selected sources, which is used as input to the task region. For each select source the file lists the source ID number (from the observation source list) and the source coordinates (from the exposure source list). The task also updates the observation source list, setting a flag for each source which has been selected for product generation.
XMM-Newton SOC/SSC -- 2005-08-16