We are happy to announce the release of Siril 1.2.5, which could be the last maintenance update in the 1.2 series before the major 1.4 release. This version focuses on fixing various issues and improving stability across different platforms, particularly on macOS. While being a maintenance release, it brings important stability improvements that will benefit all users, especially our macOS community. These fixes were made possible thanks to our active user community who took the time to report issues and provide detailed feedback. This continuous interaction helps us make Siril more reliable with each release.
We were delighted to participate in the Rencontres du Ciel et de lâEspace 2024
in Paris, at La Villette, an essential event organized by the French Astronomy Association (AFA). The event took place on November 9, 10, and 11, and our presentation was a great success: the room was packed, and unfortunately, not everyone could get in.
During the presentation, we had the opportunity to showcase the new features of Siril 1.4.0, which is not yet released. It was an amazing moment, shared with astronomy and imaging enthusiasts.
We are thrilled to announce the publication of a peer-reviewed article on Siril in the Journal of Open Source Software
(JOSS). This publication is a major milestone for us, as it validates the softwareâs development, usability, and impact in the open-source and astronomical imaging communities.
If Siril has been part of your work, we encourage you to cite it using the following reference:
C. Richard et al., Journal of Open Source Software, 2024, 9(102), 7242. DOI: 10.21105/joss.07242
This release of Siril 1.2.4 continues the effort to stabilize the 1.2 series by addressing a number of bugs that were reported by our dedicated community of users. Although no new features have been introduced in this version, the program is now more robust and reliable.
The first bug found has not been completely corrected, and many users have reported slowness. We therefore invite all macOS users to download the new package, revision 3, which bears the build number 11207.
A bug has been found in macOS versions preventing the use of multiple threads during calculations. Both packages have been updated to version 2 (build number 10977). We invite all our macOS users to download the new packages.
We’re delighted to announce that Siril 1.2.2 is now available. Many bugs have been fixed compared to version 1.2.1 released last year, and we hope that version 1.2.2 will be as stable as possible.
List of fixed bugs (since 1.2.1)
Removed background extraction samples after using it in script (#1265)
Fixed catalog parser problem with negative declination (less than 1°) (#1270)
Fixed weighting by number of stars during stacking if number of stars is the same accross the sequence (#1273)
Improved mouse pan and zoom control to enable one-handed operation (!638, fixes #1271)
Added an option to the LINK command in order to sort output by date (#1115)
Fixed pixel size set by astrometry using binning_update preference (#1254)
Fixed crash when querying stats on a CFA image with a selection smaller than a 2x2 square (#1286)
Fixed crash when saving compressed and croped images (#1287)
Disabled supernumerary use of openmp in demosaicing, which could lead to a crash (#1288)
Fixed ser orientation error (#1258, #1261)
Fixed crash during rejection stacking when using shift-registered sequence (#1294)
Fixed mouse scrollwheel scrolling too fast (#1151)
Fixed drag & drop in image display on macOS (#1310)
Fixed bug in rgradient (Larson Sekanina) filter (#1313)
Fixed bug in generalized hyperbolic stretches (#1314)
Fixed path parsing error with savetif (#1318)
Added handling of empty command pipe reads (closes #1277)
We are pleased to announce the release of a script and tutorial dedicated to Zwo’s new All-in-One telescope, Seestar.
The tutorial explains step-by-step how to use the script, and then how to process the stacked image. The proposed script has been designed to automatically pre-process the raw images recorded by the Seestar and give the best image, automatically.
We hope it will meet your expectations. To find out how, click here
. The link to download the script is in the tutorial.
We are pleased to announce that Siril 1.2.1 is now available. Many bugs have been fixed compared to the 1.2.0 release last year, and we hope that version 1.2.1 will be as stable as possible.
List of known bugs
None for the moment, fingers crossed.
List of fixed bugs (since 1.2.0)
Fixed Anscombe VST noise reduction option for mono images
Fixed HEIF import (#1198)
Fixed Noise Reduction Anscombe VST bug with mono images (#1200)
Fixed problems with Fourier Transform planning > Estimate (#1199)
Fixed data initialisation bugs in copyfits() and RGB compositing tool
Fixed exported x-column for lightcurves when Julian date is not selected (#1220)
Fixed sampling tolerance for astrometry which was incorrectly read (#1231)
Allowed for RA/DEC to be sorted in PSF windows (#1214)
Added SET-TEMP as valid FITS header to be saved (#1215)
Added configurable color for background extraction sample and standard annotations (#1230)
Fixed argument parsing error in makepsf (!593)
Fixed light_curve and csv export from plot when some images were unselected from the sequence (#1169)
Added undo/redo when platesolving with astrometry.net (#1233)
Fixed crash in findstar when detecting stars close to the border (#1237)
Fixed using wcs info when using light_curve command (#1195)
Allowed moving file into workdir to be picked up for livestacking (#1223)
Fixed the way we check if there is enough space to use quick photometry (#1238)
Fixed bit depth evaluation for 8-bit images (#1244)
We are delighted to inform you that Siril 1.2.0 is now available. Many bugs have been corrected since the previous release candidate, making this new version ready to become the final version.
This version doesn’t bring anything new compared to version 1.2.0-rc1, but it does include a large number of bug fixes. In fact, as the list of users grew ever larger, so did the number of bug reports we received, enabling us to fix a large amount of issues. Many thanks to you all.
We are pleased to inform you that Siril 1.2.0rc1 is now available, only a few weeks after the release of beta1. Many bugs have been fixed since the previous beta, which makes this new version more stable and reliable.
However, we remind you that the release candidate version of the software is an intermediate stage of development that precedes the final version. It should be noted that a release candidate may contain bugs, unfinished features and stability issues. It is made available to users for feedback and extensive testing. Your contribution in reporting problems will help the developers to improve the final version of the software.
We are excited to share that Telescope Live, the online platform dedicated to
astrophotography and remote imaging, has created a new video tutorial series
for Siril, available for free for anyone. The 6 videos, totaling 39 minutes,
are specially targeted at beginners. They cover many operations required to
transform a raw dataset into a beautifully processed image.
Telescope Live operates very high quality telescopes under the best skies
of both hemispheres and provides a huge number of pictures in their archive,
yet at an affordable price. They spent time learning to use Siril, creating
scripts, and producing the video tutorials, making them available for free. The
fact that this tutorial series is free and available to anyone is because they
share the same mission with us: making astrophotography accessible to everyone.
We are pleased to inform you that Siril 1.2.0-beta2 is now available, only a few weeks after the release of beta1. Many bugs have been fixed since the previous beta, which makes this new version more stable and reliable.
However, we remind you that the beta version of a software is a first version of the software that is still under test and development. It is made available for feedback and further testing before the final version is released to the public. Beta versions may contain bugs or incomplete functionality, and are intended for testing purposes. Please check this page regularly for updates and status of any bugs found in this beta 2.
A little more than a year ago, we released version 1.0.0 of Siril. This version number, highly symbolic, symbolized the age of maturity of a software that we believe had become stable and powerful. Since then, many updates came to improve little by little this version 1.0 by fixing many bugs and by bringing small improvements. In parallel to the development of this so-called stable branch, we have continued to intensively develop new features, resulting in profound changes. These features are now part of this new release with the version number 1.2.0-beta1.
MacOS Ventura is the thirteenth major version of macOS, released recently. Currently, Siril cannot be executed correctly on it because it is impossible to use the mouse on the application. This bug, which is very annoying, is caused by low-level changes in Ventura that affect GTK, the library that manages the graphical interface of Siril. And all applications using GTK3 are affected by this bug, namely GIMP v2.99, RawTherapee, Inkscape, Darktable and many others…
While version 1.0.5 could be the last available version of the 1.0 branch, it turns out that some annoying bugs have been reported and needed to be treated as a priority. Siril 1.0.6 is therefore made available for bug fixing purposes only. Indeed, the development of version 1.2.0 is in full swing and currently takes us a lot of time.
Shortly after the release of version 1.0.4, last week, we are forced to make a fix and release Siril 1.0.5 much earlier than expected. Indeed, we found a bug introduced in the previous version when we had fixed a bug. Sometimes, errors compensate and don’t show up, but when you fix one, the other one shows up. This is exactly what happened here. This bug is critical and causes a shift of 1 pixel in x and y after a registration of images on which there was a meridian flip. We would like to warmly thank Kristopher Setnes for finding this bug and making sure it doesn’t live for long.
It’s back to school time, and with it, comes a new version of Siril: version 1.0.4. This is one of the last (if not the last) of the 1.0 branch. This version is mainly a stabilization version, but it still contains a small new feature in the tool introduced in the last update, the generalized hyperbolic transformation. For more information please read on.
Before the month of June comes to an end, we had to release a new version in order to keep the cruising rhythm started after the release of version 1.0.
Keeping up on the fantastic pace of one release per month, we are pleased to announce the release of Siril 1.0.2. This is once again a stabilisation version and a continuation of 1.0.1. We recommend you update to benefit from the bug corrections and new features described in this page.
One month after the release of Siril 1.0.0 (first stable version), we are pleased to announce the release of Siril 1.0.1 which stabilizes this version even more. Indeed, although the development of the 1.2 branch is particularly active, we decided to maintain a 1.0 branch in order to provide users with a follow-up of this first stable version.
10 years have passed since branch 0.9 restarted the then-dropped development of Siril. So we are extremely proud, happy and thrilled to release Siril 1.0.0 for download. This version is the result of a period of hard work started in 2020 and we hope it opens the beginning of a new era. Today, Siril team consists of 3 devs, the historical duo working under GNU/Linux environment, while the last team member works under Microsoft Windows, which has helped a lot stabilizing Siril behavior for this OS.
More and more, we see the term master dark flat all over the forums. These are supposed to replace the biases that are usually used in the standard preprocessing of astronomical images. We read that the result is better using a dark flat (shot with the same exposure time as the flats) than with standard biases. But is this really the case? Why such a frenzy for a master image that no one was talking about not so long ago?
This version is a stabilization of the rc1 version, the new features are presented in detail here
. We invite you to read this page carefully in order to know the implemented functions. However, we have made a short video explaining a bit how to use the improved plotting feature:
This is the first release candidate
of the 1.0.0 version. It comes with some new features and many bug fixes compared to the previous beta version (0.99.10.1), and contain all features that will be present in the final version. From now, we will focus on bug fixes in order to release as soon as possible the 1.0.0 version.
This is the fourth beta of the upcoming version 1.0. It comes with some new features and many bug fixes compared to the previous beta version (0.99.8.1) and also compared to the stable version (0.9.12), and continues the big refactoring started with the 0.99 series.
Due to a crash with some FITS files of the 0.99.8 version (generally coming from ASIAIR system), a bug fix was quickly released under the 0.99.8.1 version. We encourage everyone to update their software, even if Siril says that everything is up to date.
This is the third beta version of the upcoming 1.0 version. It comes with many improvements and bug fixes over the second beta (0.99.6) and also some over the stable version (0.9.12), and continues the big refactoring started with the 0.99 series.
One month after the release of the first beta version of Siril 1.0,
which was largely adopted and praised by users, we are releasing a second beta version, with number 0.99.6. It fixes important issues that were found in the previous release, 0.99.4, thanks to the kind feedback of our community. It has already been tested by many users and should
work in most cases. Remember this is a beta version, but we consider it already better than the previous stable version, the 0.9.12.
The most important and especially the most awaited change is the switch to native 32-bit floating point for all calculations. The default FITS format is now of type TFLOAT. The files are therefore twice as large in size as before and the memory used is also twice as large. However, where one would have expected twice as long computation times, a lot of optimization work was done throughout the code. For comparison, on a machine with an I9 core, 32GB of DDR4 RAM (a good machine), a stack of 47 images takes 5min 24s with version 0.9.12 while only 2min01s are needed to stack 32bits images under 0.99.4. That makes Siril probably the fastest tool to process your astronomy images.
We think it is time, time to release this new version for beta testing.
Since the last stable version, the 0.9.12, more that 1400 commits were pushed to our repository, more than 66 000 new lines of code were added. A lot of new developers helped us in optimization, new features and bug fixes. It is for sure our biggest improvement to the code of Siril.
This is why, unlike we used to do, weâve decided to publish a beta version for the three most common platforms. This version, the 0.99.4 has been tested for some time by a few lucky users and should work in most cases. If you have issues with it or find bugs, we would be very grateful if you could contact us or report them to our bug system tracker
.
Comet NeoWise in the evening sky â above BrĂŒnstelkreuz mountain (1734m)
The author: Frank Stefani is a beginner in astrophotography (since 6 months),and also been a professional photographer and experienced visual-only astronomer for over 4 decades.
It is Christmas for all macOS users right now. Indeed, 0.9.12 version has been now released for this platform. You can then go to the Download
section in order to get it right now.
We are glad and proud to announce the release of the new Siril version: 0.9.12. This version containing a lot of improvement is accessible through the download section.
For more information about the new features, please follow this link
.
We are glad and proud to announce the release of the new Siril version: 0.9.11. This version containing a lot of improvement is accessible through the download section.
For more information about the new features, please follow this link
.
Siril 0.9.10 has been released and brings its load of new features and improvements. It provides a new comet registration method, astrometry solving, previewing for processing functions, and new commands available for scripts. Windows support has been improved, in particular for special characters in file names. We also have moved to a gitlab source and issue control system to facilitate interaction with users and developers. See other news in the release notes(https://free-astro.org/index.php?title=Siril:0.9.10
).
The Sirilic version V0.36 provides an additional tool: Sirilot
Itâs the contraction of âSiriL + Lotâ. SiriLot is a siril extension that allows you to batch process multiple channel and sessions. Indeed, Sirilic is adapted to process only 1 layer but as soon as you wanted to process the 4 layers LRGB, you had to do 4 times the operation âCopy + script generationâ. The author still wanted to keep Sirilic: so he created a second tool with a more batch-oriented graphical interface:
A new OS X installer, packaged by a Siril user, is now available for the 0.9.9 version. The great news of this package is that the set of DSLR scripts is now embeded as it was already done for the Windows version. Moreover, it is now possible for the user to uninstall the application very easily and properly from his computer.
You may want to use Siril scripts to automatically pre-process your images at the end of the nightly sequence with KSTARS / INDI / EKOS. Or, you also may want to download the pre-processed, registered and stacked file and not all the RAW files in the case of a remote control observatory ?
Below is described the detailed procedure that was established after an exchange with Jasem, the main developer of EKOS :
This release contains some new features as well as some bug fixes: #
Major update of the command line, with completion and documentation in the GUI, enhanced scripting capability by running commands from a file and also allowing it to be run with no X11 server running with the -s command line option
Added commands to stack and register a sequence
Image statistics, including auto-stretch parameters and stacking normalization, are now cached in the seq file for better performance
Global star registration now runs in parallel
Workflow improvement by adding demosaicing as last part of the preprocessing
Added a filtering method for stacking based on star roundness
Added an option to normalize stacked images to 16-bit with average rejection algorithm
All GUI save functions are now done in another thread
Improved histogram transformation GUI
Improved support of various FITS pixel formats
Preserve known FITS keywords in the stacked image by average method
Added native open and save dialogues for Windows users
Various Windows bug fixes in SER handling
Fixed wrong handling of scale variations in Drizzle case
This release is the ninth stability release for the 0.9 branch. Its SVN revision is 2403. It also has an SVN tag: 0.9.9. Stability updates and minor improvements occur in the dedicated 0.9 branch. This is the second version officially supported on Windows, and it even includes developments that were specially made for Windows. But please keep in mind that Siril is developed without Windows and that we rely on Windows users to test and give us feedback about integration or porting problems.
The new 0.9.9 version has been released, with bug fixes, and new script feature.
February 19, 2018
A patch of the 0.9.8 version has been released: 0.9.8.3.
January 31, 2018
The new 0.9.8 version has been released, with bug fixes, improvements on lucky imaging and Windows integration.
December 4, 2017
A new 0.9.8 version is progressing well and will particularly help people working on deep-sky lucky imaging.
We have also started working on features for the next major version of Siril, version 1.0. The first development, started at the beginning of the year, aims to greatly speed up the display of images and the rendering effects and this looks very promising. Other major developments will be the use of a better precision, floating point, internal image format that will give better results with some algorithms, the parallelisation of preprocessing and the creation of a high quality registration and stacking method for planetary images. It will still take a lot of time, but that will be a fully featured and fast version of Siril. Current 0.9.x versions are stable and already provide great results for deep-sky image processing.
September 21, 2017
New release 0.9.7. Click here for past releases. Siril is now available on Windows as a beta version!
First stable version available: 0.9.0. Stability updates and minor improvements will occur in the dedicated 0.9 branch.
June 10, 2015
New registration method available! It is now possible to register images with an automatic global star detection tool. The algorithm takes into account the translation and the rotation.
April 13, 2015
We have been working hard on accelerating stacking algorithms on multi-core CPUs, giving SER a better support and we are also working on the two main lacks of Siril: taking into account rotation and multi-point in registration, for better deep-sky and planetary registrations. These works are in progress, and will take some weeks to complete.
