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#!/usr/bin/env python3
#
# Copyright (c) 2016-2018 Weitian LI <weitian@aaronly.me>
# MIT License
#
# TODO:
# * allow to query by coordinates & radius range
# * filter queryed results according to the type/other...
# * if not queryed by name, then try query by coordinates
#
"""
Query SIMBAD with the provided name or coordinate.
http://simbad.u-strasbg.fr/simbad/
References
----------
* astroquery: SimbadClass
https://astroquery.readthedocs.org/en/latest/api/astroquery.simbad.SimbadClass.html
* All available VOTable fields:
http://simbad.u-strasbg.fr/simbad/sim-help?Page=sim-fscript#VotableFields
"""
import sys
import argparse
import csv
from collections import OrderedDict
from astroquery.simbad import Simbad
from astroquery.exceptions import RemoteServiceError
# Simbad configurations
Simbad.ROW_LIMIT = 30
Simbad.TIMEOUT = 20
# Add query items/fields:
# otype: standard name of the object type
# rv_value: Radial velocity value. Eventually translated from a redshift
# z_value: Redshift value. Eventually translated from a radial velocity
# rvz_qual: Quality code (A: best, .., E: worst)
# rvz_type: stored type of velocity: 'v'=radial velocity, 'z'=redshift
Simbad.reset_votable_fields()
Simbad.add_votable_fields('otype', 'rv_value', 'z_value',
'rvz_qual', 'rvz_type')
def query_name(name, verbose=False, print_header=False):
"""
Query SIMBAD by name.
"""
try:
q = Simbad.query_object(name)
main_id = str(q['MAIN_ID'][0], encoding='utf-8')
otype = str(q['OTYPE'][0], encoding='utf-8')
rv = q['RV_VALUE'][0]
z = q['Z_VALUE'][0]
rvz_qual = q['RVZ_QUAL'][0]
rvz_type = q['RVZ_TYPE'][0]
except RemoteServiceError:
main_id = None
otype = None
rv = None
z = None
rvz_qual = None
rvz_type = None
if verbose:
print('*** %s: not found ***' % name, file=sys.stderr)
#
results = OrderedDict([
("Name", name),
("SIMBAD_ID", main_id),
("Type", otype),
("RV", rv),
("z", z),
("RV/z_Quality", rvz_qual),
("RV/z_Type", rvz_type),
])
if verbose:
if print_header:
print(",".join(results.keys()))
print(",".join([str(v) for v in results.values()]))
return results
def main():
parser = argparse.ArgumentParser(
description="Query SIMBAD database by source name")
parser.add_argument("-v", "--verbose", dest="verbose",
action="store_true",
help="show verbose information")
parser.add_argument("-b", "--brief", dest="brief",
action="store_true",
help="be brief and do not print header")
parser.add_argument("-i", "--input", dest="input", required=True,
help="source names to be queried (sep by comma); " +
"or a file contains the names (one per line)")
parser.add_argument("-o", "--output", dest="output", default=sys.stdout,
help="output CSV file with queried data")
args = parser.parse_args()
try:
names = list(map(str.strip, open(args.input).readlines()))
except FileNotFoundError:
names = list(map(str.strip, args.input.split(",")))
results_list = []
print_header = True
for name in names:
qr = query_name(name, verbose=args.verbose,
print_header=print_header)
print_header = False
results_list.append(qr)
try:
of = open(args.output, "w")
except TypeError:
of = args.output
writer = csv.writer(of)
if not args.brief:
writer.writerow(results_list[0].keys())
for res in results_list:
writer.writerow(res.values())
if of is not sys.stdout:
of.close()
if __name__ == "__main__":
main()
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