Cédric ChampeauMeasuring solar differential velocity with a spectroheliograph, right on time for Voxxed Days CERN! https://melix.github.io/blog/2026/02/05-measuring-solar-rotation.html
Cédric Champeau 🔭In this blog post, I describe how I detected a potential Ellerman Bomb, and how I implemented an algorithm in #JSolEx to detect these: https://melix.github.io/blog/2025/05-19-jsolex-3-2-0.html
Image in CaH captured at lunch break from my backyards, between clouds and trees. Stack of 10 images selected from a set of 20 (most of them had clouds). Stacked and processed with #JSolEx 3.0.2. The clear disk version is off-band by 1 Å.
Super excited to present the new #JSolEx 3.0 release! https://melix.github.io/blog/2025/04-14-jsolex-3-0-0.html
A Calcium H image of the sun, shot with an SHG700, a 560mm refractor, stacked and processed using #JSolEx.
Shows one of the longest filaments I have ever seen!
Sun, Helium D3, captured today with my SHG 700, stacked and processed using #JSolEx
A story where I describe how I accidentally discovered that the SHG 700 specs were incorrect: https://melix.github.io/blog/2025/03-11-jsolex-shg700.html
Thanks to Minh Nguyen for his support!
Images of today's sun. Captured with a #SolEx and processed with #JSolEx. The Helium image is a stack of 3 images, processed in a single click. #solar
L'Astro Club Challandais organise des rencontres solaires le 7 juin. L'occasion de venir découvrir le Sunscan, avec @guillaumebertrand, le Sol'Ex avec Jérôme Bastardie, l'influence des optiques sur la photographie solaire avec Claude Schumacher. J'y serai aussi si vous souhaitez discuter #JSolEx .
In this blog post I explain how active region detection and labelling works in JSol'Ex. I hope you enjoy!
https://melix.github.io/blog/2025/02-01-jsolex-actve-areas.html