April 29, 2023: Biggest solar haul in a while, part 1, H-alpha

[michael.h.f.wilkinson]

Was treated to some glorious sunshine this morning, so set up the APM 80 mm F/6 triplet with Beloptik Tri-Band ERF first, and rattled off some WL and Ca-K full disks (to be posted in part 2), before switching to H-alpha. I recorded 16 1,000 frame SER files with the ASI174MM, stacked these in AS!3, sharpened in ImPPG, stitched in MS-ICE, and final tweaks with curves in GIMP. Seeing was good enough to use 50% of the data.

Grey scale:

Pseudo colour:

Part inverted:

Part inverted + pseudo colour:

I took a single, 4,000 frame SER file of the section of the disk with the biggest ARs, for some detail images

Grey scale:

Pseudo colour:

Part inverted:

Part inverted + pseudo colour:

Finally, I got out the Tri-Band SCT, and made a small mosaic of the big ARs:

I am not sure I nailed focus, and seeing was turning choppy, but I am still quite pleased with the result