OST Wiki - en

heliostar76 - [Solis Etalon]

rhainich@undisclosed.example.com (rhainich) — Fri, 08 May 2026 06:16:37 +0000

Sky-Watcher Heliostar 76 Hα Overview The Sky-Watcher Heliostar 76 Hα is a dedicated solar telescope designed exclusively for observing the Sun in the hydrogen-alpha (Hα) band at a wavelength of 656.28 nm. Unlike white-light filters, which show only the photosphere, an Hα telescope reveals the chromosphere — the outer layer of the Sun's atmosphere. This makes visible details that remain invisible through a standard solar filter: prominences, filaments, flares, and spicules.

photometrie_python - [Cross correlation with the extracted data]

rhainich@undisclosed.example.com (rhainich) — Thu, 23 Apr 2026 15:14:15 +0000

N2 - Photometry of open star clusters Remark: This article describes the modern data reduction and data analysis for the N2 experiment using an almost fully automated Python script for the reduction of flatfields and dark frames as well as the stacking and alignment of the star cluster images. The classical version, where the displacements are measured by hand and manually entered into a routine, is described in the article $(B-V)_{0} = (B-V) - E_{(B-V)}$$V_{0} = V - A_{V}$$E_{(B-V)}$$(B-V)$$(B…

master_introduction_ss2026.pdf - created

rhainich@undisclosed.example.com (rhainich) — Fri, 17 Apr 2026 10:51:06 +0000