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        <lastBuildDate>Wed, 20 May 2026 07:08:10 +0000</lastBuildDate>
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            <title>OST Wiki</title>
            <link>https://polaris.astro.physik.uni-potsdam.de/wiki/</link>
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        <item>
            <title>reservation - [Calendar with the current occupancy] </title>
            <link>https://polaris.astro.physik.uni-potsdam.de/wiki/doku.php?id=en:praktikum:reservation&amp;rev=1779130677&amp;do=diff</link>
            <description>Reservation of observations





Reservation of night observations at the OST

	*  Please log in with your username and password
	*  Afterwards you will be able to see the booking form and a calendar, showing the occupancy
	*  In the Name field please state the name of your group and the scheduled observations (e.g.</description>
            <author>rhainich@undisclosed.example.com (rhainich)</author>
            <pubDate>Mon, 18 May 2026 18:57:57 +0000</pubDate>
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        <item>
            <title>reservation - [Kalender mit der aktuellen Belegung] </title>
            <link>https://polaris.astro.physik.uni-potsdam.de/wiki/doku.php?id=de:praktikum:reservation&amp;rev=1779130541&amp;do=diff</link>
            <description>Terminreservierung








Reservierung für Nachtbeobachtungen am OST

	*  Zum Anmelden bitte mit Benutzername und Passwort einloggen
	*  Anschließend können Sie das Buchungsformular und einen Kalender mit der Belegung einsehen
	*  Im Namensfeld bitte Gruppennamen und geplante Versuche angeben (z.B.</description>
            <author>rhainich@undisclosed.example.com (rhainich)</author>
            <pubDate>Mon, 18 May 2026 18:55:41 +0000</pubDate>
        </item>
        <item>
            <title>heliostar76 - [Solis Etalon] </title>
            <link>https://polaris.astro.physik.uni-potsdam.de/wiki/doku.php?id=en:ost:telescope:heliostar76&amp;rev=1778220997&amp;do=diff</link>
            <description>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&#039;s atmosphere. This makes visible details that remain invisible through a standard solar filter: prominences, filaments, flares, and spicules.</description>
            <author>rhainich@undisclosed.example.com (rhainich)</author>
            <pubDate>Fri, 08 May 2026 06:16:37 +0000</pubDate>
        </item>
        <item>
            <title>heliostar76 - [Solis-Etalon] </title>
            <link>https://polaris.astro.physik.uni-potsdam.de/wiki/doku.php?id=de:ost:telescope:heliostar76&amp;rev=1778220955&amp;do=diff</link>
            <description>Sky-Watcher Heliostar 76 Hα

Überblick

Der Sky-Watcher Heliostar 76 Hα ist ein dediziertes Sonnenteleskop, das ausschließlich zur Beobachtung der Sonne im Wasserstoff-alpha-Band (Hα) bei einer Wellenlänge von 656,28 nm ausgelegt ist. Im Gegensatz zu Weißlichtfiltern, die lediglich die Photosphäre zeigen, ermöglicht ein Hα-Teleskop den Blick in die Chromosphäre – die äußere Schicht der Sonnenatmosphäre. Dadurch werden Details sichtbar, die mit einem normalen Sonnenfilter unsichtbar bleiben: Prot…</description>
            <author>rhainich@undisclosed.example.com (rhainich)</author>
            <pubDate>Fri, 08 May 2026 06:15:55 +0000</pubDate>
        </item>
        <item>
            <title>vortragsplan</title>
            <link>https://polaris.astro.physik.uni-potsdam.de/wiki/doku.php?id=deng:praktikum:vortragsplan&amp;rev=1777991748&amp;do=diff</link>
            <description>Vortragsplan Bachelor
  Datum/Date    Vortrag/Talk    Vortragender/Speaker             To be determined        



Vortragsplan Master

For a comprehensive overview of how to prepare talks in a scientific context, see:

	*  this [presentation] 
	*  this [checklist]
  Date    Talk</description>
            <author>lidia@undisclosed.example.com (lidia)</author>
            <pubDate>Tue, 05 May 2026 14:35:48 +0000</pubDate>
        </item>
        <item>
            <title>logbuch_content</title>
            <link>https://polaris.astro.physik.uni-potsdam.de/wiki/doku.php?id=deng:ost:logbuch_content&amp;rev=1777761608&amp;do=diff</link>
            <description>2026

May
 Date   Start    End    Who?    What has been done?   ...  ...  ...  ...   Add entry  02.05.2026  23:00  00:15  Rainer  DADOS: TYC 3826-63-1 candiate  01.05.2026  22:00  01:30  Rainer  DADOS: Two BD+53 2790 candiates 
April
 Date   Start    End    Who?</description>
            <author>rhainich@undisclosed.example.com (rhainich)</author>
            <pubDate>Sat, 02 May 2026 22:40:08 +0000</pubDate>
        </item>
        <item>
            <title>photometrie_python - [Cross correlation with the extracted data] </title>
            <link>https://polaris.astro.physik.uni-potsdam.de/wiki/doku.php?id=en:praktikum:photometrie_python&amp;rev=1776957255&amp;do=diff</link>
            <description>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…</description>
            <author>rhainich@undisclosed.example.com (rhainich)</author>
            <pubDate>Thu, 23 Apr 2026 15:14:15 +0000</pubDate>
        </item>
        <item>
            <title>photometrie_python - [Kreuzkorrelation mit den extrahierten Daten] </title>
            <link>https://polaris.astro.physik.uni-potsdam.de/wiki/doku.php?id=de:praktikum:photometrie_python&amp;rev=1776957150&amp;do=diff</link>
            <description>N2 - Photometrie eines offenen Sternhaufens

Hinweis: Dieser Artikel schildert die moderne Auswertung des N2-Versuchs mithilfe eines fast vollautomatischen Python-Skripts für die Reduktion von Flatfields und Darkframes sowie die Addition und Ausrichtung der Sternhaufenaufnahmen. Die klassische Version, bei der die Verschiebungen von Hand ausgemessen und manuell in eine Routine eingegeben werden, wird im Artikel $(B-V)_{0} = (B-V) - E_{(B-V)}$$V_{0} = V - A_{V}$$E_{(B-V)}$$(B-V)$$(B-V)_{0}$$A_{V}…</description>
            <author>rhainich@undisclosed.example.com (rhainich)</author>
            <pubDate>Thu, 23 Apr 2026 15:12:30 +0000</pubDate>
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            <title>master_introduction_ss2026.pdf - created</title>
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            <pubDate>Fri, 17 Apr 2026 10:51:06 +0000</pubDate>
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            <pubDate>Thu, 16 Apr 2026 10:27:43 +0000</pubDate>
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            <author>rhainich@undisclosed.example.com (rhainich)</author>
            <pubDate>Wed, 01 Apr 2026 13:05:45 +0000</pubDate>
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            <author>rhainich@undisclosed.example.com (rhainich)</author>
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            <title>maxim_dl_observatory_telescope_2.png - angelegt</title>
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            <author>rhainich@undisclosed.example.com (rhainich)</author>
            <pubDate>Wed, 11 Feb 2026 13:35:26 +0000</pubDate>
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