Last modified: December 2018

AHELP for CIAO 4.13


Context: tools


Creates a stack of background regions for a given source list


The script takes an input source list and scaling factor (N). It creates a list of background regions with radii N times the source radii.

The script works on CIAO format region files for circular and elliptical regions in physical coordinates.

This script is used in conjunction with ("ahelp mksubbgreg") in the Create an Image of Diffuse Emission thread.


ASCII region file (CIAO format): sources_mod.reg
Multiply source radius by: 2
Output filename: bkg.reg

Create a stack of background regions centered on the source regions in "sources_mod.reg" with radii twice as large.

Note that the script always prompts for the inputs, even if they are supplied on the command line.

About Contributed Software

This script is not an official part of the CIAO release but is made available as "contributed" software via the CIAO scripts page. Please see this page for installation instructions.


See the bugs page for this script on the CIAO website for an up-to-date listing of known bugs.

Refer to the CIAO bug pages for an up-to-date listing of known issues.

See Also

dmmasks, dmregions
convert_ds9_region_to_ciao_stack, dither_region, dmcontour, dmgroupreg, dmimgdist, dmimgfilt, dmimghull, dmimglasso, dmmakereg, get_src_region, mksubbgreg, rank_roi, regphystocel, roi, splitroi, tg_create_mask