Table of Contents
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.
| 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 here.
Manual
A User's Guide, next to other helpful documents, can be found here.
For the calibration we have a calibration module from Shelyak, for the operation of which we of course also have an article 
The BACHES echelle 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 Baader Product Page provides helpfull documents like the manual or the calibration instructions.