Spectrographical observations are taken out with the DADOS or the BACHES spectrograph, both manufactured by [[http://www.baader-planetarium.de/dados/dados.htm | Baader Planetarium]].

====== The DADOS spectrograph ======
[{{ ost:spektrograph:dados:spektrograph_klein.jpg?295| Our 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.

^  Grating      ^  Dispersion at 550nm       ^^  Spectral resolution $\frac{\lambda}{\Delta\lambda}$ at 550nm  ^^^  Spectral range in nm   ^
|  Line/mm  | nm/mm  | nm/3.76µm Pixel |  25µm  |  35µm  |  50µm  |  QHY 268M  |
|  200      | 47.61  | 0.179           |  543   |  388   |  272   |  ~9300      |
|  900      | 12.67  | 0.048           |  3818  |  2727  |  1909  |  ~4400      |

Representative spectra that where taken with our DADOS spectrograph can be found [[en:ost:spektrograph:aufnahmen|here]].

==== Manual ====
/*
[[http://www.baader-planetarium.de/dados/download/dados_manual_english.pdf | User's Guide (PDF)]]
*/
A User's Guide, next to other helpful documents, can be found  [[http://www.baader-planetarium.com/en/baader-dados-slit-%E2%80%93-spectrograph.html | here]].

For the calibration we have a calibration module from Shelyak, for the operation of which we of course also have an [[en:ost:spektrograph:dados_calibration | article]] :-)
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====== The BACHES echelle spectrograph ======

[{{ :ost:spektrograph:baches:baches_st-8.jpg?295| Our new BACHES spectrograph }}]

The new echelle spectrograph from Baader Panetarium, which has been developed by the Max-Planck-Institut for extraterrestrial physics, has the following properties:
  * Resolution: $R = \frac{\lambda}{\Delta \lambda} = 14,000-20,000$
  * Wavelength range: $\lambda$ = 400-700 nm (without gaps)
  * maximum efficiency: 31%

==== Manual ====

The [[ http://www.baader-planetarium.com/en/baches-echelle-spectrograph.html | Baader Product Page]] provides helpfull documents like the manual or the calibration instructions.
/*
[[http://www.baader-planetarium.de/baches/download/baches_manual_e.pdf | User's Guide (PDF)]]

[[http://www.baader-planetarium.de/news/baches/baches_english.htm | Baader Product page]]

==== Calibration ====
[[http://www.baader-planetarium.de/baches/download/midas_manual.pdf | Calibration manual]]
*/