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Дата изменения: Fri Jan 10 23:25:53 2003
Дата индексирования: Sat Dec 22 07:42:46 2007
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Поисковые слова: comet tail

XMM-Newton Science Analysis System


arfgen (arfgen-1.54.7) [xmmsas_20030110_1802-5.4.1]

Meta Index / Home Page / Usage and Examples

Example 1: Point source

Here is a typical example of running arfgen based on a spectrum of a point source:

arfgen spectrumset=spectrum.ds detmaptype=psf

Generates a dataset ancillaryfile.ds. The effective area, filter transmission and quantum efficiency curve are included in the ARF.

A point source located at the centre of the source region described in the data subspace within spectrum.ds is assumed. An encircled energy correction is applied (section 5.5). Corrections are applied for any CCD gaps within the source region but not for bad pixels.

The ARF is emission-weighted using an internal detector map based on the PSF. The map is rectangular-shaped, and has a weighting which falls off with distance from the source in line with the PSF.