Monthly archives: április, 2026

Oxygen Smudges Across The Wavelengths

2026.04.06.
englishsaját asztrofotóim
0 Comment

O I 7772 ~ continuum, dark smudge at center-top-left

On 2026-04-05, I imaged the Sun across multiple wavelengths, and found that areas that are dark smudges in oxygen are:

  • rather unassuming bright-ish plages in:
    • Hα
    • Ca II 8542
    • Na I D2
  • nothing obvious, small sunspot aside, in:
    • continuum
    • Fe I 7781
  • dark in:
    • (O I 7772, hence smudge)
    • He I D3
    • He I 10830
    • H Paschen gamma

The images presented below are from scans recorded across several hours, each wavelength is the result of several scans stacked together. During acquisition, no major flares were reported. More about oxygen smudges here, here and here.

(tovább…)

Facebooktwitterredditpinterestlinkedinmail

Oxygen Smudge, 2026-04-01

2026.04.02.
englishsaját asztrofotóim
0 Comment

Using the familiar setup, I recorded four frames and stacked them together. The smudge appears somewhat embering-glowing in SDO AIA 1600, but as a bright spot in AIA/SUVI 304.

The smudge predictor is an attempt to estimate where a smudge could be expected:

stretch(someMath(AIA 1600) – someMath(AIA 1700)),

flares and smudges might appear bright in the image.

(tovább…)

Facebooktwitterredditpinterestlinkedinmail
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.).