https://polaris.astro.physik.uni-potsdam.de/wiki/ Fri, 17 Apr 2026 06:04:12 +0000 FeedCreator 1.8 https://polaris.astro.physik.uni-potsdam.de/wiki/lib/exe/fetch.php?media=wiki:logo.png https://polaris.astro.physik.uni-potsdam.de/wiki/ https://polaris.astro.physik.uni-potsdam.de/wiki/doku.php?id=en:ost:spektrograph:aufnahmen&rev=1546955895&do=diff Comparison between the 200 lines and the 900 lines grating The following figures show spectra of approximately 700 Å width for different stars. The blue and red spectra were taken with the grating exhibiting 900 lines/mm and 200 lines/mm, respectively. The spectral resolution in the anonymous@undisclosed.example.com (Anonymous) Tue, 08 Jan 2019 13:58:15 +0000 https://polaris.astro.physik.uni-potsdam.de/wiki/doku.php?id=en:ost:spektrograph:dados_calibration&rev=1733911125&do=diff DADOS RCU Introduction For calibration of the DADOS spectra we use the Alpy calibration module from Shelyak, which is equipped with an argon-neon lamp for wavelength calibration and a tungsten lamp for flat-field calibration. To remotely control this calibration unit, a simple remote control upgrade module (RCU) has been created. It allows the user to remotely control both a flat-field lamp and a wavelength calibration lamp via serial communication through a COM port on a computer. The heart … anonymous@undisclosed.example.com (Anonymous) Wed, 11 Dec 2024 09:58:45 +0000 https://polaris.astro.physik.uni-potsdam.de/wiki/doku.php?id=en:ost:spektrograph:grunddaten&rev=1775041155&do=diff Spectrographical observations are taken out with the DADOS or the BACHES spectrograph, both manufactured by Baader Planetarium. The DADOS spectrograph For the DADOS spectrograph we have a 200 lines/mm and 900nm/mm grating. Currently the 900 lines/mm grating is mounted and used for most of the observations. The basic data are partly taken from the Baader website.$\frac{\lambda}{\Delta\lambda}$$R = \frac{\lambda}{\Delta \lambda} = 14,000-20,000$$\lambda$ anonymous@undisclosed.example.com (Anonymous) Wed, 01 Apr 2026 10:59:15 +0000 https://polaris.astro.physik.uni-potsdam.de/wiki/doku.php?id=en:ost:spektrograph:setup&rev=1416170087&do=diff Setup of the Spectrograph * Construction of spectrograph and CCD * Mounting to the telescope * Focussing * of an object onto the slit * of the slit onto the CCD * Orientation anonymous@undisclosed.example.com (Anonymous) Sun, 16 Nov 2014 20:34:47 +0000