blob: 14d5fd159e8539c9124d8b6908cc56495da8524f (
plain)
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
|
#
# Aaron LI
# Created: 2016-05-04
# Updated: 2016-05-04
#
"""
module to process the INFO.json file, contains some handy functions
to extract the needed information.
"""
import json
def load_info(info):
"""
Load data from the INFO.json if necessary.
"""
if isinstance(info, str):
json_str = open(info).read().rstrip().rstrip(",")
return json.loads(json_str)
else:
# assuming that the provided `info` is already a Python dictionary
return info
def get_r500(info):
"""
Get the R500 value (in unit pixel and kpc), as well as its errors.
Arguments:
* info: filename of the INFO.json, or the info dictionary
Return:
a dictionary contains the necessary results
"""
info = load_info(info)
if "IN_SAMPLE" in info.keys():
# ZZH's INFO
r500_kpc = float(info["R500"])
r500EL_kpc = float(info["R500_err_lower"])
r500EU_kpc = float(info["R500_err_upper"])
else:
# LWT's INFO
r500_kpc = float(info["R500 (kpc)"])
r500EL_kpc = float(info["R500_err_lower (1sigma)"])
r500EU_kpc = float(info["R500_err_upper (1sigma)"])
# Convert kpc to Chandra ACIS pixel
rmax_sbp_pix = float(info["Rmax_SBP (pixel)"])
rmax_sbp_kpc = float(info["Rmax_SBP (kpc)"])
kpc_per_pix = rmax_sbp_kpc / rmax_sbp_pix
r500_pix = r500_kpc / kpc_per_pix
r500EL_pix = r500EL_kpc / kpc_per_pix
r500EU_pix = r500EU_kpc / kpc_per_pix
results = {
"r500_kpc": r500_kpc,
"r500EL_kpc": r500EL_kpc,
"r500EU_kpc": r500EU_kpc,
"r500_pix": r500_pix,
"r500EL_pix": r500EL_pix,
"r500EU_pix": r500EU_pix,
"kpc_per_pix": kpc_per_pix,
}
return results
|
