Infrared prism objective available at TNG
The infrared multi-mode instrument of TNG, NICS, can now perform low resolution spectroscopic observations using the Amici prism in slit-less mode. The frame format is similar to classical prism-objective images, an example is given in the figure below.
Characteristics and performances
Field of view
3.5 x 4.2 arcmin
Spectral coverage
0.9-1.75 microns
Long wavelength cutoff set by SW filter
Dispersion (Å/pixel)
100 (H), 80 (J), 55 (1mic)
Resolving power
40...