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GreatAttractor

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About GreatAttractor

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    Poland
  1. I agree with Michael. Over-sharpening in case of this image is also demonstrated by the "turned edge" - the white ring along the limb. I remember it well from my too-eager WL processing efforts from a few years back In general, I discourage using the "automatically sharpened" output files. You should consider each image (or image set) separately and fine-tune sharpening parameters, be it wavelets or deconvolution.
  2. Thank you, everyone.
  3. Not much was happening on the Sun on Friday, but a few hours of good seeing cannot go unused. 30-second intervals, 2:49 h total (with breaks); note the penumbral waves around the small sunspot and the curiously converging mottles in bottom-left corner: Plasma rain caught in crosswind (30-second intervals, 2:18 h with breaks): Everything shot with a 90 mm refractor + Lunt 50 etalon, PGR Chameleon 3 mono (ICX445), processed with Stackistry and ImPPG.
  4. To be exact, ImPPG is cross-platform just like oaCapture and can be built from sources as a native Mac application (as I don't have a Mac, currently I don't provide a Mac binary for download).
  5. ImPPG for image processing and preparing time-lapses might be of interest (also check out the 2 tutorial links there).
  6. Good work! It's not easy to get an evenly illuminated (on-band) full- or half-disc with a tilt-tuned etalon. When I worked with my Lunt 35, I usually used a 1.6x Barlow (2x Barlow's lens element screwed into camera's nosepiece) and took 4 panes for a mosaic (with a generous overlap). Results were usually uniform:
  7. You bet! In case of a good close-up, the rotation is clearly visible over mere 2 hours:
  8. Thanks. Of course, everything is captured and processed by me unless noted otherwise
  9. This season started for me almost a month later than it did last year, but equally well. Great seeing on Saturday (so, a 6-hour session) and quite good on Sunday. Everything captured with a 90 mm refractor + pressure-tuned etalon, PGR Chameleon 3 mono (ICX445), processed with Stackistry and ImPPG. 30-second intervals in time-lapses. Class M5.3 flare in AR 2644 (maximum at 4/02 8:04 UTC), 0:46 h total: Solar event list and descriptions can be found at http://www.swpc.noaa.gov/products/solar-and-geophysical-event-reports. Smoky prominences, 0:53 h total: Active Region 2645, chromo- to photosphere transition, made by gradually lowering the etalon pressure: Pretty but rather minor activity in AR 2645, including penumbral waves, 1:42 h total (click to view, takes a while to load): AR 2645:
  10. Yeah, a flaring AR on the limb is a peach!
  11. Yesterday I was bitten by kernel update (to 4.10.5) on my main computer (I use Fedora 25). The boot process would at some point just stop, with nothing suspicious in the last visible boot messages; the machine was responsive, though, and Ctrl-Alt-Del reboot was possible. Booting using the previous kernel was fine. After reviewing the boot log (where -1 means second-to-last boot, -0 would be the last (successful) boot etc.): journalctl -k -b -1 it turned out there was a problem uploading firmware blob to my Radeon R7 370 (I use the standard open-source driver): kernel: [drm] radeon: 2048M of VRAM memory ready kernel: [drm] radeon: 2048M of GTT memory ready. kernel: [drm] Loading pitcairn Microcode kernel: radeon 0000:01:00.0: Direct firmware load for radeon/si58_mc.bin failed with error -2 kernel: [drm] radeon/PITCAIRN_mc2.bin: 31100 bytes kernel: si_fw: mixing new and old firmware! kernel: [drm:si_init [radeon]] *ERROR* Failed to load firmware! kernel: radeon 0000:01:00.0: Fatal error during GPU init Indeed, for my particular Radeon model the newer kernel tries to upload si58_mc.bin, but the file was missing. The solution was to get the file from https://people.freedesktop.org/~agd5f/radeon_ucode/, put it in /usr/lib/firmware/radeon and regenerate initramfs images: dracut --regenerate-all --force
  12. Had a few fruitful sessions with the new 90 mm refractor/Lunt 50 etalon setup: Animations (they take a while to load):
  13. Download from: https://github.com/GreatAttractor/imppg/releases/tag/v0.5.3 Bug fixes: Fixed filling the list of recently used settings under Windows
  14. Excellent! What kind of setup did you use?
  15. Sure. Riklaunim has even captured Barnard's Loop with the older, less sensitive DMK21: http://www.rkblog.rk.edu.pl/w/p/wide-field-imaging-dmkdbkdfk-cameras-and-cs-lens/ I've made a few attempts too with my planetary cameras (ICX445 and IMX136 sensors). Widefield only, with old M42 lenses, as I don't have any guiding gear. Exposure data in the links. (when on Astrobin, click the images for full size)