1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# NOTE:
# * NedClass
# https://astroquery.readthedocs.org/en/latest/api/astroquery.ned.NedClass.html
#
# ChangeLog:
#
# 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 NED with the provided name or coordinate.
NASA/IPAC Extragalactic Database: http://ned.ipac.caltech.edu/
"""
__version__ = "0.1.0"
__date__ = "2016-01-14"
import sys
import argparse
import csv
from astroquery.ned import Ned
from astroquery.exceptions import RemoteServiceError
from astropy import coordinates
import astropy.units as u
## Ned configurations
Ned.TIMEOUT = 20
def query_name(name, verbose=False):
"""
Query NED by name.
"""
try:
q = Ned.query_object(name)
objname = str(q['Object Name'][0], encoding='utf-8')
objtype = str(q['Type'][0], encoding='utf-8')
velocity = q['Velocity'][0]
z = q['Redshift'][0]
z_flag = str(q['Redshift Flag'][0], encoding='utf-8')
refs = q['References'][0]
notes = q['Notes'][0]
if verbose:
print('%s: %s,%s,%s,%s,%s,%s,%s' % (name, objname, objtype,
velocity, z, z_flag,
refs, notes))
except RemoteServiceError as e:
objname = ''
objtype = ''
velocity = ''
z = ''
z_flag = ''
refs = ''
notes = ''
if verbose:
print('*** %s: not found ***' % name, file=sys.stderr)
#
results = {
'objname': objname,
'objtype': objtype,
'velocity': velocity,
'z': z,
'z_flag': z_flag,
'refs': refs,
'notes': notes,
}
return results
def main():
parser = argparse.ArgumentParser(
description="Query NED ...")
parser.add_argument("-V", "--version", action="version",
version="%(prog)s " + "%s (%s)" % (__version__, __date__))
parser.add_argument("infile",
help="file contains list of names; one per line")
parser.add_argument("outfile",
help="output with queryed data, empty if not found; CSV format")
parser.add_argument("-v", "--verbose", dest="verbose",
action="store_true", help="show verbose information")
args = parser.parse_args()
name_list = []
objname_list = []
objtype_list = []
velocity_list = []
z_list = []
z_flag_list = []
refs_list = []
notes_list = []
with open(args.infile) as f:
for name in f:
name = str.strip(name)
name_list.append(name)
qr = query_name(name, verbose=args.verbose)
objname_list.append(qr['objname'])
objtype_list.append(qr['objtype'])
velocity_list.append(qr['velocity'])
z_list.append(qr['z'])
z_flag_list.append(qr['z_flag'])
refs_list.append(qr['refs'])
notes_list.append(qr['notes'])
with open(args.outfile, 'w') as of:
writer = csv.writer(of)
writer.writerow([ "Name", "NED_Name", "Type", "Velocity",
"z", "z_Flag", "References", "Notes" ])
for i in range(len(name_list)):
writer.writerow([ name_list[i],
objname_list[i],
objtype_list[i],
velocity_list[i],
z_list[i],
z_flag_list[i],
refs_list[i],
notes_list[i] ])
if __name__ == "__main__":
main()
# vim: set ts=4 sw=4 tw=0 fenc=utf-8 ft=python: #
|
