On 2025-06-16, at around 0936Z there was a bright flare visible in both Na D1 and Na D2, but also in He I D3 as a bright flash. 27 scans were recorded between 0856Z and 0940Z, with the last couple having the flare. The presented disk image is a composition of stacks, one stack of the disk without the flare, and another stack that shows the flare (motion blurred over a few minutes). Curious dopplers are also present in the raw, as sample frames from the raw scan show.

2025-06-16-0856 -09-38

2025-06-16-09nn 8-Sun-NaHe spectra

2025-06-16-0917 2-Sun-NaHe F 00005326

2025-06-16-0939 8-Sun-NaHe F 00004982

2025-06-16-0933 8-Sun-NaHe F 00005043

2025-06-16-0936 8-Sun-NaHe F 00005132

2025-06-16-0936 8-Sun-NaHe F 00005134

raw continuum

raw He disk

autostretched He disk

delta = He – continuum