.. ex4_gnirsls_Kband111mm_red.rst

.. include:: symbols.txt

.. _gnirsls_Kband11mm_red_example:

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Example 4 - Beyond 2.3 microns K-band Longslit Point Source (111 l/mm grating)
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In this example, we will reduce a GNIRS K-band longslit observation with a
central wavelength beyond 2.3 |um| with the 111 l/mm grating.  The target is
HD 179821, likely a yellow hypergiant star.

The particularity of this sequence is that the arc lamp has only five
lines and the OH and O\ :sub:`2`\  lines are absent beyond 2.3 |um|.  To get an accurate
wavelength calibration, we have to use The emission features in the sky spectrum of the
science observations.

.. toctree::
   :maxdepth: 1

   ex4_gnirsls_Kband111mm_red_dataset
   ex4_gnirsls_Kband111mm_red_cmdline
   ex4_gnirsls_Kband111mm_red_api