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ntt_efosc2.rst

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NTT EFOSC2

Overview

This file summarizes several instrument specific settings that are related to the NTT/EFOSC2 spectrograph.

Arcs

Refer here for each prism and here for the whole HeAr line list. PypeIt only supports Gr#4, Gr#5 and Gr#6 for now. Note that the 9113 line in Gr#5 given by ESO is wrong.

Flat

Fringing affects Gr#5 significantly, so flat fielding is skipped. If would like to keep it, add this to the :ref:`pypeit_file`:

[scienceframe]
    [[process]]
        use_illumflat = True
        use_pixelflat = True

Overscan

Overscan subtraction is aborted for this instrument, we found it leads to a bad subtraction for ~20% of the data. To allow it, add this to the :ref:`pypeit_file`:

[scienceframe]
    [[process]]
        use_overscan = True