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[gnuastro-devel] [task #14167] Calculating the upper limit magnitude for
From: |
Mohammad Akhlaghi |
Subject: |
[gnuastro-devel] [task #14167] Calculating the upper limit magnitude for each detection |
Date: |
Thu, 29 Sep 2016 13:50:35 +0000 (UTC) |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:49.0) Gecko/20100101 Firefox/49.0 |
URL:
<http://savannah.gnu.org/task/?14167>
Summary: Calculating the upper limit magnitude for each
detection
Project: GNU Astronomy Utilities
Submitted by: makhlaghi
Submitted on: Thu 29 Sep 2016 10:50:33 PM JST
Should Start On: Thu 29 Sep 2016 12:00:00 AM JST
Should be Finished on: Thu 29 Sep 2016 12:00:00 AM JST
Category: MakeCatalog
Priority: 7 - High
Item Group: New feature
Status: In Progress
Privacy: Public
Percent Complete: 70%
Assigned to: makhlaghi
Open/Closed: Open
Discussion Lock: Any
Effort: 0.00
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Details:
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.
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