1. Spectral Configurations
2. Spatial Sampling
3. Nomenclature

Spectral Configurations

OASIS ofters fifteen different spectroscopic modes of varying spectral coverage and resolution. Each mode is described in terms of its resolution (LR, MR and HR for low, medium and high resolution respectively) and its central wavelength (in nm). For example, MR735 is a medium resolution mode centred at 735nm. The following table summarises the resolution, spectral coverage and dispersion of each configuration:

Configuration	Resolution R	Wavelength range 1 (Å)	Dispersion (Å / pixel)
LR610 2	200-1400	4200 - 8000	3 - 35 3
LR951	1000	8650 - 10370	4.74
MR454	1140	4150 - 4930	2.13
MR516	1290	4760 - 5560	2.15
MR591	1480	5500 - 6320	2.16
MR661	1650	6210 - 7010	2.17
MR735	1840	6940 - 7760	2.19
MR807	2020	7690 - 8460	2.21
MR875	2190	8350 - 9150	2.23
MR952	2380	9150 - 9900	2.25
HR502	2510	4850 - 5200	0.99
HR530	2650	5110 - 5480	1.00
HR638	3190	6210 - 6550	0.99
HR667	3340	6490 - 6840	1.00
HR869	4350	8440 - 8750	0.87

1. A set of 15 filters determines the spectral range of each configuration. Transmission curves for each of the filters can be found here.

2. If you are interested in applying to use the LR610 spectroscopic configuration, please contact Chris Benn in advance of the proposal deadline.

3. Variable dispersion: 3, 11, 35 Å/pixel at 4200, 6000, 8000 Å respectively.

A visual overview of the fifteen spectroscopic configurations is shown below: