taskGNU Astronomy Utilities - Tasks: task #14167, Calculating the upper limit...


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task #14167: Calculating the upper limit magnitude for each detection

Submitted by:  Mohammad Akhlaghi <makhlaghi>
Submitted on:  Thu 29 Sep 2016 01:50:33 PM UTC  
Should Start On:  Wed 28 Sep 2016 03:00:00 PM UTC Should be Finished on:  Wed 28 Sep 2016 03:00:00 PM UTC
Category:  MakeCatalog Priority:  7 - High
Item Group:  New feature Status:  Done
Privacy:  Public Percent Complete:  100%
Assigned to:  Mohammad Akhlaghi <makhlaghi> Open/Closed:  Closed
Effort:  0.00

Sun 02 Oct 2016 10:43:56 PM UTC, comment #1: 

This feature has been added and pushed to the main repository. See the commit message and updated book for a thorough discussion.

Mohammad Akhlaghi <makhlaghi>
Project AdministratorIn charge of this item.
Thu 29 Sep 2016 01:50:33 PM UTC, original submission:  

One very important factor in measuring the magnitude of an object is this: what is the faintest acceptable magnitude for a given object (segmentation map) in an image? This depends on various things like the depth of the image, image correlated noise, or the shape and size of the object.

The standard way of finding this upper limit for an object is to measure the flux in a large number of randomly positioned (but identical in shape) segments over un-detected regions of the image.

For another project, I recently wrote an implementation of this process using Gnuastro's newly installed libraries. So I am now busy implementing it within MakeCatalog as a new column that the user can ask for.

Mohammad Akhlaghi <makhlaghi>
Project AdministratorIn charge of this item.


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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2016-10-02 makhlaghi StatusIn Progress => Done
        Percent Complete70% => 100%
        Open/ClosedOpen => Closed

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