description: The NACO prism spectroscopy has
been re-introduced since P86. There are three spectroscopic modes
with the prism - L27_P1, S13_P1, and S27_P1. The spectral resolution
varies from about 40 in the J-band to 250 in the M-band.
The spectral traces of prism spectra are quite complex. In general,
the trace can be fitted with the 4th order Legendre polynomial, but
the coefficients of the polynomial depend on the location of the
spectra on the array.
For further details regarding the characteristics of the modes consult
the NACO User
Manual.
 |
Example of the stellar spectrum with the L27_P1 mode. The spectrum
extends from ~0.85 um on the top to ~5.5 um near the bottom. Note
striking changes in brightness along the wavelength direction.
|
This mode is offered in visitor mode and is not supported by the pipeline.
calibrations:The calibration plan includes
- standard detector darks with readout mode and DIT matching the one used for science;
- SW spectroscopic lampflats;
- SW spectroscopic arcs;
- telluric standard stars taken with air mass difference no grater than 0.1, if possible;
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