Magyar menüt kérek. Show menu in Hungarian

Tag: kalcium K vonal

Sun, in CaK 2021-12-23

ASI 178MM (cooled), Baader K-Line Filter 1.25″ (double stacked), TS-Optics 76/342 TS76EDPH, mountpusher, EQ3-mod

facebooktwittergoogle_plusredditpinterestlinkedinmail

Sun, CaK, 2021-12-17

I only had a few minutes between the clouds, so no heavy post-processing this time, given that I don’t have the usual 10×3 minutes, which significantly reduces the … noise, a pixel size “something” I guess, present  either in the instrument or really on the Sun.

The gear: ASI 178MM (cooled), Baader K-Line Filter 1.25″ (double stacked), TS-Optics 76/342 TS76EDPH, mountpusher, EQ3-mod

Same happenned for 2012-12-15, only a few minutes. We can see the beautiful spotted region rotating into view

facebooktwittergoogle_plusredditpinterestlinkedinmail

The Sun in Calcium K – 2021-12-18

Finally, the clouds broke over the ersatz-obsi, and the Sun is showing some awesome activity. The image was taken, as usual, through the Calcium filter, which I found yields the best images, hydrogen alpha aside, of the surface of the Sun, running circles around the solar continuum, as long as a full disk image is the goal.

ASI 178MM (cooled), Baader K-Line Filter 1.25″ (double stacked), TS-Optics 76/342 TS76EDPH, mountpusher, EQ3-mod, with the automated filterwheel.

facebooktwittergoogle_plusredditpinterestlinkedinmail

The Sun in 2015-07-03, CaK, then vs reprocessed

Using a setup I no longer have, an Atik camera, I made a mosaic of the Sun with the N150/750 tube, through the Baader K-Line Filter 1.25″ (double stacked) filter. I processed it back then, and reprocessed it now. It shows the difference.

Calcium K (2015)

Calcium K (2015)

Calcium K 2015, reprocessed in 2021

Calcium K 2015, reprocessed in 2021

facebooktwittergoogle_plusredditpinterestlinkedinmail

The Sun in CaK, 2021-12-01

ASI 178MM (cooled), Baader K-Line Filter 1.25″ (double stacked), TS-Optics 76/342 TS76EDPH, mountpusher, EQ3-mod

facebooktwittergoogle_plusredditpinterestlinkedinmail

Sun, CaK, 2021-11-24

ASI 178MM (cooled), Baader K-Line Filter 1.25″ (double stacked), TS-Optics 76/342 TS76EDPH, mountpusher, EQ3-mod

 

facebooktwittergoogle_plusredditpinterestlinkedinmail

The Sun in Calcium K, 2021-11-28

ASI 178MM (cooled), Baader K-Line Filter 1.25″ (double stacked), TS-Optics 76/342 TS76EDPH, mountpusher, EQ3-mod

facebooktwittergoogle_plusredditpinterestlinkedinmail

Sun, CaK, 2021-11-25

ASI 178MM (cooled), Baader K-Line Filter 1.25″ (double stacked), TS-Optics 76/342 TS76EDPH, mountpusher, EQ3-mod,18x3minutes,  the best  300  frames from each sub, stacked.

facebooktwittergoogle_plusredditpinterestlinkedinmail

The Sun, through filters

While I have a few theories about why the UV, through glass, looks the way it looks, I’ll leave the theory out.

ASI 178MM (cooled), %filter%, TS-Optics 76/342 TS76EDPH, mountpusher, EQ3-mod with either ND5 or ND3.8, as the band pass filter asks for it.

Also, I updated the filterwheel’s firmware. If you are wondering why it’s not on github, wonder about microsoft a bit.

One can see how limb darkening is truly stronger in the blue end of the spectrum, and that for most intents and puproses, the Calcium K yields the second best amount of detail, after the… hydrogen alpha. The solar continuum is, comparatively, useless for full disk images.

facebooktwittergoogle_plusredditpinterestlinkedinmail

Sun, CaK, 2021-11-12

ASI 178MM (cooled), Baader K-Line Filter 1.25″ (double stacked), TS-Optics 76/342 TS76EDPH, mountpusher, EQ3-mod

facebooktwittergoogle_plusredditpinterestlinkedinmail

Jól kalibrált monitoron mindegyik számnál elkülönülő árnyalat látszik. Ha mégsem látszanak, akkor a megjelenített képek színhiányosan rajzolódnak ki. A monitort valószínűleg kalibrálni kell.

You should see distinct shades for each number. If those shades are not clearly visible, the displayed pictures will lack accuracy. Your display most likely needs to be calibrated (brightness, gamma, contrast etc.).