import re
import collections
import requests
from threeML.io.network import internet_connection_is_active
[docs]
def compute_fermi_relative_mission_times(trigger_time):
"""
If the user has the requests library, this function looks
online to the HEASARC xtime utility and computes other mission
times relative to the input MET
:param trigger_time: a fermi MET
:return: mission time in a python dictionary
"""
mission_dict = collections.OrderedDict()
if trigger_time == 0:
return None
# Complements to Volodymyr Savchenko
xtime_url = "https://heasarc.gsfc.nasa.gov/cgi-bin/Tools/xTime/xTime.pl"
pattern = """<tr>.*?<th scope=row><label for="(.*?)">(.*?)</label></th>.*?<td align=center>.*?</td>.*?<td>(.*?)</td>.*?</tr>"""
args = dict(
time_in_sf=trigger_time,
timesys_in="u",
timesys_out="u",
apply_clock_offset="yes",
)
if internet_connection_is_active():
content = requests.get(xtime_url, params=args).content
mission_info = re.findall(pattern, content, re.S)
mission_dict["UTC"] = mission_info[0][-1]
mission_dict[mission_info[7][1]] = mission_info[7][2] # LIGO
mission_dict[mission_info[8][1]] = mission_info[8][2] # NUSTAR
mission_dict[mission_info[12][1]] = mission_info[12][2] # RXTE
mission_dict[mission_info[16][1]] = mission_info[16][2] # SUZAKU
mission_dict[mission_info[20][1]] = mission_info[20][2] # SWIFT
mission_dict[mission_info[24][1]] = mission_info[24][2] # CHANDRA
return mission_dict
else:
return None