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# Source code for astroquery.ipac.ned

    # Licensed under a 3-clause BSD style license - see LICENSE.rst
    """
    NED Query Tool
    ==============

    Module containing a series of functions that execute queries to the NASA
    Extragalactic Database (NED):

    .. topic:: Revision History

        Refactored using common API as a part of Google Summer of Code 2013.

        :Originally contributed by:

         K. Willett, Jun 2011

        :Acknowledgements:

            Based off Adam Ginsburg's Splatalogue search routine:
                https://github.com/keflavich/agpy/blob/master/agpy/query_splatalogue.py

            Service URLs to acquire the VO Tables are taken from Mazzarella et
            al. (2007) The National Virtual Observatory: Tools and Techniques
            for Astronomical Research, ASP Conference Series, Vol. 382., p.165

    """
    from astropy import config as _config

    class Conf(_config.ConfigNamespace):
        """
        Configuration parameters for `astroquery.ipac.ned`.
        """
        server = _config.ConfigItem(
            ['https://ned.ipac.caltech.edu/cgi-bin/'],
            'Name of the NED server to use.')

        timeout = _config.ConfigItem(
            60,
            'Time limit for connecting to NED server.')

        # Set input parameters of choice

        hubble_constant = _config.ConfigItem(
            [73, 70.5],
            'Value of the Hubble Constant for many NED queries.')

        """
        The correct redshift for NED queries may be chosen by specifying numbers
        1, 2, 3 and 4, having the following meanings:
        (1) To the Reference Frame defined by the 3K CMB
        (2) To the Reference Frame defined by the Virgo Infall only
        (3) To the Reference Frame defined by the (Virgo + GA) only
        (4) To the Reference Frame defined by the (Virgo + GA + Shapley)
        """
        correct_redshift = _config.ConfigItem(
            [1, 2, 3, 4],
            'The correct redshift for NED queries, see comments above.')

        # Set output parameters of choice
        output_coordinate_frame = _config.ConfigItem(
            ['Equatorial',
             'Ecliptic',
             'Galactic',
             'SuperGalactic'],
            'Frame in which to display the coordinates in the output.')

        output_equinox = _config.ConfigItem(
            ['J2000.0', 'B1950.0'],
            'Equinox for the output coordinates.')

        sort_output_by = _config.ConfigItem(
            ["RA or Longitude",
             "DEC or Latitude",
             "GLON",
             "GLAT",
             "Redshift - ascending",
             "Redshift - descending"],
            'Display output sorted by this criteria.')

    conf = Conf()

    from .core import Ned, NedClass

    __all__ = ['Ned', 'NedClass', 'Conf', 'conf']