XMM-Newton Science Analysis System
evigweight (evigweight-1.6) [xmmsas_20050815_1803-6.5.0]
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Advantages: exact, easy to use (only one ARF), can deal with any
complex spatial variation of the source.
Drawbacks: degradation of the statistical quality:
 |
(11) |
from Eq.5 and
6.
This is not a problem if the effective area is not varying much in the
region considered
(
).
XMM-Newton SOC/SSC -- 2005-08-16