XMM-Newton Science Analysis System
arfgen (arfgen-1.66.4) [xmmsas_20050815_1803-6.5.0]
Meta Index / Home Page / Description / Spatial region settings
A spectrum may be produced by filtering events using a 2-dimensional
mask in either sky or detector coordinates. This is supported for the
calculation of the ARF of an extended source. To maintain the resolution
of the image mask it is important to use a finely binned detector map
within arfgen
(see section 5.3).
e.g.
arfgen spectrumset=spectrum.ds extendedsource=yes detxbins=100 detybins=100
NB: The backscale
task is currently not capable of correctly
processing spectra produced from masked regions.
XMM-Newton SOC/SSC -- 2005-08-16