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.
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.