Calibration on L'Arciere Celeste

Correcting bias drift through overscan calibration

Fri, 12 Aug 2022 15:01:50 +0000

Page translated by Claude — switch to Italian to read the original article.

Image calibration is a crucial step during the pre-processing of astronomical images; this short article takes a closer look at the calibration of cameras that suffer from the phenomenon known as bias drift, thanks to calibration using the overscan area.

Beloved Flat Fields

Fri, 12 Aug 2022 07:13:22 +0000

Page translated by Claude — switch to Italian to read the original article.

Calibrating astronomical images is one of the key steps to achieving a quality result, and one of the most important steps in this phase is the application of the flat field.

During my PixInsight courses all over Italy, one question, unrelated to the use of the software but of fundamental importance for image calibration, is: how many ADU should I make my FLATs?

Verifying the linearity of image sensors: going beyond linear regression.

Tue, 13 Oct 2020 21:14:11 +0000

Page translated by Claude — switch to Italian to read the original article.

One of the most debated and least understood issues among non-specialists is the so-called linearity of electronic image sensors.

CCD and CMOS imaging sensors should possess one fundamental characteristic if they are to be used for scientific purposes or even just for advanced astronomical imaging: the sensor’s response to light must be linear.

When BatchPreprocessing fails.

Sat, 17 Feb 2018 13:32:59 +0000

Page translated by Claude — switch to Italian to read the original article.

This tutorial, created by Edoardo Luca Radice and Vittorio Liberti of the Astrofili Veneti (http://www.astrofiliveneti.it/), aims to analyze and solve one of the possible problems that could be encountered when using PixInsight’s BatchPreprocessing with the Default values.
Using BatchPreprocessing with the default values, the final result was the following (as an example, only the image obtained with the SII filter is used).