XMM-Newton Science Analysis System
omdetect (omdetect-5.41) [xmmsas_20230412_1735-21.0.0]
Figure 1 shows an example of a OM image with the detected ds9 source regions- to enable the regions to be seen more clearly,
only part of the image is shown.
Example OM image showing the ds9 regions of the detected sources
The ds9 source regions in this image have their number in the source-list table written above them (in green
if a point-like source or cyan if an extended source). Each source has one or more circles/ellipses
centred on its computed coordinates. The innermost circle/ellipse identifies the source as either point-like (green) or
Some features of these regions are now described:
- Source 34 has green and blue circles, identifying it as a point-source and lying close to an edge of the image.
- Sources 43, 6 and 17 have green and magenta circles, identifying them as a point-sources and lying close to a read-out streak (barely discernible- for source 43
the star responsible for the streak is off the image, for the other two sources source 2 is responsible).
- Many sources towards the upper-right of the image have red circles/ellipses indicating that they lie within the central-enhancement region.
- Sources 2 and 4 have green and black circles, indicating that they are point-sources and are very bright with likely modula-8 patterns.
- Sources 28 and 17 have also green and black circles, but in their case the black circles indicate that they lie close to a very bright source (source 4).
XMM-Newton SOC -- 2023-04-16