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Downloads of v 0.99.6:


Last Update:

04 Nov 2020

Package Maintainer(s):

Software Author(s):

  • Vincent Hourdin
  • Cyril Richard
  • François Meyer
  • Contributors


siril astronomical image processing


This is not the latest version of SIRIL available.

  • 1
  • 2
  • 3

0.99.6 | Updated: 04 Nov 2020



Downloads of v 0.99.6:



Software Author(s):

  • Vincent Hourdin
  • Cyril Richard
  • François Meyer
  • Contributors

SIRIL 0.99.6

This is not the latest version of SIRIL available.

  • 1
  • 2
  • 3

All Checks are Passing

3 Passing Tests

Validation Testing Passed

Verification Testing Passed


Scan Testing Successful:

No detections found in any package files

Learn More

Deployment Method: Individual Install, Upgrade, & Uninstall

To install SIRIL, run the following command from the command line or from PowerShell:


To upgrade SIRIL, run the following command from the command line or from PowerShell:


To uninstall SIRIL, run the following command from the command line or from PowerShell:


Deployment Method:


This applies to both open source and commercial editions of Chocolatey.

1. Enter Your Internal Repository Url

(this should look similar to https://community.chocolatey.org/api/v2/)

2. Setup Your Environment

1. Ensure you are set for organizational deployment

Please see the organizational deployment guide

2. Get the package into your environment

  • Open Source or Commercial:
    • Proxy Repository - Create a proxy nuget repository on Nexus, Artifactory Pro, or a proxy Chocolatey repository on ProGet. Point your upstream to https://community.chocolatey.org/api/v2/. Packages cache on first access automatically. Make sure your choco clients are using your proxy repository as a source and NOT the default community repository. See source command for more information.
    • You can also just download the package and push it to a repository Download

3. Copy Your Script

choco upgrade siril -y --source="'INTERNAL REPO URL'" --version="'0.99.6'" [other options]

See options you can pass to upgrade.

See best practices for scripting.

Add this to a PowerShell script or use a Batch script with tools and in places where you are calling directly to Chocolatey. If you are integrating, keep in mind enhanced exit codes.

If you do use a PowerShell script, use the following to ensure bad exit codes are shown as failures:

choco upgrade siril -y --source="'INTERNAL REPO URL'" --version="'0.99.6'" 

Write-Verbose "Exit code was $exitCode"
$validExitCodes = @(0, 1605, 1614, 1641, 3010)
if ($validExitCodes -contains $exitCode) {
  Exit 0

Exit $exitCode

- name: Install siril
    name: siril
    version: '0.99.6'
    state: present

See docs at https://docs.ansible.com/ansible/latest/modules/win_chocolatey_module.html.

chocolatey_package 'siril' do
  action    :install
  source   'INTERNAL REPO URL'
  version  '0.99.6'

See docs at https://docs.chef.io/resource_chocolatey_package.html.

cChocoPackageInstaller siril
    Name     = "siril"
    Version  = "0.99.6"
    Source   = "INTERNAL REPO URL"

Requires cChoco DSC Resource. See docs at https://github.com/chocolatey/cChoco.

package { 'siril':
  ensure   => '0.99.6',
  provider => 'chocolatey',
  source   => 'INTERNAL REPO URL',

Requires Puppet Chocolatey Provider module. See docs at https://forge.puppet.com/puppetlabs/chocolatey.

4. If applicable - Chocolatey configuration/installation

See infrastructure management matrix for Chocolatey configuration elements and examples.


Private CDN cached downloads available for licensed customers. Never experience 404 breakages again! Learn more...

Package Approved

This package was approved by moderator flcdrg on 13 Nov 2020.


SIRIL is an astronomical image processing tool.

It is specially tailored for noise reduction and improving the signal/noise ratio of an image from multiple captures, as required in astronomy.

SIRIL can align automatically or manually, stack and enhance pictures from various file formats, even image sequence files (films and SER files).

SIRIL is targeted to amateur astronomers having acquired images and wanting to process them in a semi-automatic way.

SIRIL uses modern and powerful processing algorithms running in parallel in order to speed up the time of processing.

Nearly the whole processing chain is available in SIRIL. With only one software you can produce high quality images for print or web diffusion.

SIRIL is fully capable to pre-process and process astronomic images by offering to the users a large set of dedicated algorithms. So far, due to the high level of its star detection algorithm it is quite performant to process deep-sky images in an easy way.

Thanks to the ability to directly process SER videos, SIRIL is adapted to the deep-sky lucky imaging technic. All algorithms work to use all cores of the computer, making it possible to process more than 60,000 frames with minimal effort.

New features are being introduced quite regularly. Here is a list of main features:
* Native image format support
* Image conversion (to the native FITS format only)
* Images pre-processing with bias, darks and flats masters
* Image registration
* Registered sequence export
* Image stacking, with optional additive or multiplicative normalization
* Enhancement and processing of final images
* Image compositing tool, combining and aligning multiple channels
* Plotting various pieces of information about an image sequence

$toolsDir   = "$(Split-Path -parent $MyInvocation.MyCommand.Definition)"
$url       =  "https://free-astro.org/download/Install_SiriL_0_99_6_64bits_EN-FR.exe"

$packageArgs = @{
  packageName   = $env:ChocolateyPackageName
  unzipLocation = $toolsDir
  fileType      = 'EXE' 
  url           = $url

  softwareName  = 'SiriL*'

  checksum      = 'B2EC2D30665E3450CBE18286AB87B9BF6199025561DAF8E30E4E6667A51BB00D'
  checksumType  = 'sha256'

  validExitCodes= @(0)

Install-ChocolateyPackage @packageArgs
$uninstaller = ((Get-UninstallRegistryKey -SoftwareName 'Siril*').UninstallString -split '"')[1]

$packageArgs = @{
    packageName   = $env:ChocolateyPackageName
    validExitCodes= @(0)
    file          = $uninstaller
    fileType      = 'exe'

Uninstall-ChocolateyPackage @packageArgs

Log in or click on link to see number of positives.

In cases where actual malware is found, the packages are subject to removal. Software sometimes has false positives. Moderators do not necessarily validate the safety of the underlying software, only that a package retrieves software from the official distribution point and/or validate embedded software against official distribution point (where distribution rights allow redistribution).

Chocolatey Pro provides runtime protection from possible malware.

Add to Builder Version Downloads Last Updated Status
SIRIL 0.99.10 103 Saturday, September 11, 2021 Approved
SIRIL 0.99.6 171 Wednesday, November 4, 2020 Approved
SIRIL 0.9.12 242 Thursday, June 11, 2020 Approved

Released September 23, 2020

This version is a the beta version of Siril 1.0.0. In consequence, we only distribute the packages for the 3 most common platforms (Windows, MacOS, GNU/Linux). See the download page.

But as usual, since siril is a free software, it can be build on any OS from source, see the installation page.

What's new in this beta

This beta is mainly a bug fixes release

  • a bug in demosaicing orientation.
  • version has brought a lot of improvement in the demosaicing feature, but a lot of change as well. A lot of new camera is now handled by this new Siril and the introduction of a new FITS keyword tries to make more standard the way we choose the debayer algorithm orientation. However, a bug was present in the 0.99.4 that led to choose the wrong debayer orientation for BOTTOM-UP files with odd height.
  • a bug in macOS package where Siril was not multithreated while processing FITS files
  • memory leak in pixel max/min stacking
  • crash when selecting 1 pixel
  • integration in low resolution screen
  • embed ICC profile in png and TIFF files
  • default Siril now checks update at startup
  • default Siril now needs "requires" command in Script file
  • of image display with pan capacity
  • button + and - for zooming management
  • many other fixes...

What's new in Siril 0.99 branch

  • UI with a single window
  • demosaicing algorithms, RCD is now the default one
  • algorithm to fix the AF square with XTRANS sensor (Kristopher Setnes)
  • support for FITS decompression and compression with Rice/Gzip and HCompress methods (Fabrice Faure)
  • support for quantization and HCompress scale factor settings for FITS compression (Fabrice Faure)
  • functions to extract Ha and Ha/OII from RGB images
  • linear match function
  • link command to create symbolic links
  • convert command to convert all files (and link FITS)
  • preference entries for FITS compression settings (Fabrice Faure)
  • native image format: 32-bit floating point image
  • native sequence format: FITS sequence in a single image
  • UI for sequence image list
  • zoom handing: ctrl+scroll (up and down) is the new way to zoom in and out
  • preview in open dialog
  • language selector in preferences
  • image importer: HEIF format
  • stacking filtering criterion (weighted FWHM). It can exclude more spurious images
  • macOS bundle
  • RL deconvolution tool
  • keyword CTYPE3 for RGB FITS in order to be used by Aladin
  • binary siril-cli to start siril without X server
  • preference entries with darks/biases/flat libraries
  • preliminary Meson support (Florian Benedetti)
  • ROWORDER FITS keyword that should be used by several programm now
  • can now be configured in preferences
  • conversion and some other functions
  • file was totally rewritten (Florian Benedetti)
  • file was moved to more standard path
  • of several algorithms (Ingo Weyrich)
  • extraction is now available for sequence
  • Transfer Function is now available for sequence
  • code for Big Endian machine (Flössie)
  • bug in SER joining operation when Bayer information was lost
  • a bug of inaccessible directories in MacOS Catalina
  • crash on some OpenCV operation with monochrome images
  • annoying error boxes about missing disk drives on Windows

This package has no dependencies.

Discussion for the SIRIL Package

Ground Rules:

  • This discussion is only about SIRIL and the SIRIL package. If you have feedback for Chocolatey, please contact the Google Group.
  • This discussion will carry over multiple versions. If you have a comment about a particular version, please note that in your comments.
  • The maintainers of this Chocolatey Package will be notified about new comments that are posted to this Disqus thread, however, it is NOT a guarantee that you will get a response. If you do not hear back from the maintainers after posting a message below, please follow up by using the link on the left side of this page or follow this link to contact maintainers. If you still hear nothing back, please follow the package triage process.
  • Tell us what you love about the package or SIRIL, or tell us what needs improvement.
  • Share your experiences with the package, or extra configuration or gotchas that you've found.
  • If you use a url, the comment will be flagged for moderation until you've been whitelisted. Disqus moderated comments are approved on a weekly schedule if not sooner. It could take between 1-5 days for your comment to show up.
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