bHROS
A bench-mounted High Resolution Optical Spectrograph for Gemini South
Instrument description
The table below shows the basic specifications of bHROS.
| Wavelength range |
400-1000 nm |
| Spectral resolution |
R>150,000 (3.0 pixel sampling) |
| Min simultaneous wavelength coverage |
3.5 nm @400 nm wavelength |
| Blaze peak efficiency |
>20% over whole wavelength range (excluding telescope, fibre feed, seeing-induced losses and detector efficiency) |
| Input feed |
Fibres with input and output microlenses |
| Min order spacing |
3.00 mm in camera focal plane (~ 7.2 arcsec) |
| Detectors |
Mosaic of two 2048x2048 CCDs (13.5 micron pixels) |
| Image stability (spectral) |
0.05 pixel per hour (0.7 microns per hour)
|
| Image stability (spatial) |
0.05 pixel per hour (0.7 microns per hour)
|
| Optical aberrations |
Not to reduce resolving power below R=150,000 at any wavelength between 4000 and 1000 nm
|
| Scattered inter-order light |
less than 0.05 of local continuum @ 700 nm |
| Filters |
Narrow-band, broadband and NDF |
CAD view of bHROS
