Retrieve basic parameters for a given Gaia source identifier

In [12]:

    

def query_TAP(tap_endpoint, adql_query, table_to_upload=None):
    """
    Query a TAP service (designated by its tap_endpoint)
    with a given ADQL query
    
    Query is performed synchronously
    
    Return an AstroPy Table object
    """
    import requests
    from astropy.table import Table
    from astropy.io.votable import parse_single_table
    import os
    import tempfile
    import warnings
    warnings.simplefilter("ignore")
    
    r = requests.post(tap_endpoint + '/sync', data={'query': adql_query, 'request': 'doQuery', 'lang': 'adql', 'format': 'votable', 'phase': 'run'})
    
    tmp_vot = tempfile.NamedTemporaryFile(delete = False)
    with open(tmp_vot.name, 'w') as h:
        for line in r.iter_lines():
            if line:
                h.write(line.decode(r.encoding)+'\n')

    table = parse_single_table(tmp_vot.name).to_table()

    # finally delete temp files
    os.unlink(tmp_vot.name)

    return table


    

In [18]:

    

source_id = 16527034310784
endpoint = 'http://tapvizier.u-strasbg.fr/TAPVizieR/tap'
adql = """SELECT ra, dec, pmra, pmdec, parallax, phot_g_mean_mag
          FROM \"I/337/gaia\"
          WHERE source_id = %d
       """ % (source_id)

result = query_TAP(endpoint, adql)
print(result)


    

    




    ra [1]      dec [1]    pmRA [1] pmdec [1] parallax [1] phot_g_mean_mag [1]
     deg          deg      mas / yr  mas / yr     mas              mag        
------------- ------------ -------- --------- ------------ -------------------
45.1413781152 0.3596182173  -52.849   -72.711         8.66               9.972