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оригинального документа
: http://xmm.vilspa.esa.es/sas/5.4.1/doc/region/node4.html
Дата изменения: Fri Jan 10 22:46:38 2003 Дата индексирования: Sat Dec 22 07:40:45 2007 Кодировка: Поисковые слова: п п п п п п п п п п п п п п |
Parameter | Mand | Type | Default | Constraints |
eventset | yes | string | ||
Reference event file used to define the coordinate system for
the source and background regions. In general this will be the event
list to be filtered through the regions.
| ||||
sourcelisttable | yes | string | ||
Table containing source positions.
| ||||
sourceid | no | integer | ![]() ![]() | |
Index (row number) of the source in the source list for which
the region descriptions are extracted (``local'' mode only, when using
source list table). (NB. This is not related to the SRC_ID column in
XMM source lists).
| ||||
operationmode | no | string | local | ``local'' or ``global'' |
Mode switch, placing the task in ``local'' or ``global''
mode. In ``local'' mode the source and background regions for a single
source are extracted; in ``global'' mode the source region encompasses
all point sources, and the background region is the whole
field-of-view with point sources removed.
| ||||
regionfile | no | string | ||
Name of source extraction region output file.
| ||||
bkgregionfile | no | string | ||
Name of background (off-source) extraction region output file.
| ||||
radiusmode | no | string | fixed | ``fixed'' |
Mode for determining
initial source extraction radius. Currently only ``fixed'' is
supported, in future an enclosed energy fraction, surface brightness
criterion or ``sigma'' width will be added. | ||||
radius | no | real | 12.0 | |
Source radius (in arcseconds) when using ``fixed'' radius mode.
| ||||
energyfraction | no | real | 0.90 | |
Encircled energy fraction when using ``enfrac'' radius mode.
| ||||
extractionmode | no | string | ``local'' or ``coaxial'' | |
Method used
to determine background region for a source. In ``local'' mode the
background region is an annulus centred on the source with the inner
and outer radii defined as one and three times the original source
extraction radius. In ``coaxial'' mode the background region is an
annulus centred on the pointing position with inner and outer radii
defined as the source off-axis angle plus/minus the original source
extraction radius. | ||||
Parameter | Mand | Type | Default | Constraints |