HITRAN Queries (astroquery.hitran)

Getting started

This module provides an interface to the high-resolution transmission molecular absorption database API (HITRAN). The current version of the database contains a compilation of spectroscopic parameters for 49 molecular species along with their most significant isotopologues. Using the hitran module you can search transitions for a particular molecule in a given wavenumber range.

Examples

This will download all transitions of the main isotopologue of water between the wavenumbers of 3400 and 4100 cm-1. The expected type for the parameters min_frequency and max_frequency is an AstroPy quantity. The data are returned as an Table instance.

>>> from astropy import units as u
>>> from astroquery.hitran import Hitran
>>> tbl = Hitran.query_lines(molecule_number=1,
...                            isotopologue_number=1,
...                            min_frequency=0. / u.cm,
...                            max_frequency=10. / u.cm)
>>> tbl
<Table length=29>
molec_id local_iso_id    nu        sw    ... line_mixing_flag    gp     gpp
 int32      int32     float32   float32  ...      bytes1      float32 float32
-------- ------------ -------- --------- ... ---------------- ------- -------
       1            1 0.072049 1.875e-30 ...                      9.0    11.0
       1            1 0.400571 2.528e-28 ...                     27.0    21.0
       1            1 0.741682 4.451e-25 ...                     39.0    33.0
     ...          ...      ...       ... ...              ...     ...     ...
       1            1 9.640401 1.593e-34 ...                    129.0   123.0
       1            1 9.795592 1.794e-27 ...                     39.0    45.0
       1            1 9.834255 1.969e-35 ...                    135.0   141.0
       1            1 9.921502 6.136e-28 ...                     13.0    15.0

Reference/API

astroquery.hitran Package

HITRAN Catalog Query Tool

Author

Adam Ginsburg (adam.g.ginsburg@gmail.com)

Classes

HitranClass(**kwargs)

Initialize a Hitran query class.