XMM-Newton Science Analysis System

omdetect (omdetect-5.41) [xmmsas_20230412_1735-21.0.0]

omdetect

Abstract:

A program for detecting sources on OM product images, parameterising and performing aperture photometry on those detected. It is also used for grism images to detect zero and first order spectra.

Instruments/Modes
Use
Description
Parameters
Running the program
Errors
Input Files
Output Files
Output source-list file
- Mosaiced images
- QUALITY FLAGS
- Example OM image and ds9 regions
- CONFUSION FLAGS
Background algorithms
- Method 1- Current SAS algorithm (SAS 10)
- Method 2- Mean
- Method 3- Median
- Method 4- Mode algorithm
- Method 5- Using the computed background map
Algorithm
- General Comments
- Summary of the algorithm for IMAGING mode data
  - Mosaiced images
Background image
Deficiencies
Source X and Y coordinates
- Source RA and DEC coordinates (mosaiced sky-images only)
Source shape parameters (semi-major/minor axes and position angle)
Source classification
Photometry
- Point-like Sources (non-mosaiced images)
- Point-Spread Function Fitting
  - Weighting of the equations
- Extended Sources (non-mosaiced images)
- Point-like $\backslash$ extended Sources using an exposure image
  - Imporant notes
Source Flagging Algorithms
- Quality Flags
Future developments
References
Index

XMM-Newton SOC -- 2023-04-16