MOPEX Online Manual
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APEX Modules: Select Detect
Namelist Trigger: run_select_detect
Output Directory Keyword: OUTPUT_DIR
Default Output Directory: <output_dir>
Depends on: Detect
Output Directory Keyword: OUTPUT_DIR
Default Output Directory: <output_dir>
Depends on: Detect
PURPOSE
-
This module selects columns and rows from the Detect output table that satisfy user
specified constraints.
PARAMETER BLOCK
-
There is no parameter block for this module. The choice of output constraints and columns is handled by two namelist keywords, select_conditions, which allows the user to constrain the detections using a number of conditions, and select_columns, which allows the user to select which columns are written to the output table.
select_conditions = "BlendSize < 5 and flux > 20"
select_columns = "srcid, x, y, flux, BlendId, BlendSize"
INPUTS
Here are the available columns:
srcid: Extracted source number.
x: x-coordinate of source in the mosaic (pixels).
y: y-coordinate of source in the mosaic (pixels).
flux: Peak pixel flux of the point source. Units are specified in the header. Currently set to microJy.
BlendId : keeps track of the sequential number of a detection blend in the table.
BlendSize: gives the number of detections in the blend.
Some simple selection ranges, such as > and <, can be added to the select_conditions parameter.
OUTPUTS
- Output Table: The Detect table
(mosaic_detect.tbl) is overwritten with the selected data. The
full output of Detect is retained
in the raw Detect table (mosaic_detect_raw.tbl).
DISCUSSION
Normally, the user might want to select out very big blends, since point source extraction may not be reliable for them. Another use would be to remove deblend_size and deblend_id columns, which prevents MOPEX from carrying out passive deblending.| Contents | ~ | Previous: APEX Modules - Fit Radius | ~ | Next: APEX Modules - Source Estimate |
