Source inclusion criteria

XMM-Newton Science Analysis System

esources (esources-1.5) [xmmsas_20201028_0905-19.0.0]

Criteria for inclusion of a source in the output list are as follows:

The maximum value of the source ID number is limited by the number of characters allocated to hexadecimal source ID numbers (parameter numhexchar). The source ID number is a hexadecimal version of the SRC_NUM column.
No source is considered for which the ii_CTS value is null for all three EPIC instruments.
Sources are included only if a weighted sum of the ii_CTS values exceeds mintotalcts. The weight formula is

$\displaystyle C = \frac{\sum_{i=1}^{3} \delta_i \ c_i}{\sum_{i=1}^{3} \delta_i \ w_i}$ (1)

where the index runs over the three EPIC instruments, $\delta_i$ equals 0 if is a null value but 1 otherwise, and is a normalized weight associated with the instrument.
ii_DET_ML must be mindetml and ii_MASKFRAC must be minmaskfrac for at least one of the instruments ii.
The calculated width of the time bins must be .

XMM-Newton SOC -- 2021-01-26