TimeFITS

class astropy.time.TimeFITS(val1, val2, scale, precision, in_subfmt, out_subfmt, from_jd=False)[source]

Bases: astropy.time.TimeString

FITS format: “[±Y]YYYY-MM-DD[THH:MM:SS[.sss]]”.

ISOT but can give signed five-digit year (mostly for negative years);

The allowed subformats are:

  • ‘date_hms’: date + hours, mins, secs (and optional fractional secs)

  • ‘date’: date

  • ‘longdate_hms’: as ‘date_hms’, but with signed 5-digit year

  • ‘longdate’: as ‘date’, but with signed 5-digit year

See Rots et al., 2015, A&A 574:A36 (arXiv:1409.7583).

Attributes Summary

cache

Return the cache associated with this instance.

jd1

jd2

jd2_filled

mask

masked

name

scale

Time scale

subfmts

value

Convert times to strings, using signed 5 digit if necessary.

Methods Summary

format_string(self, str_fmt, \*\*kwargs)

Write time to a string using a given format.

mask_if_needed(self, value)

parse_string(self, timestr, subfmts)

Read time and deprecated scale if present

set_jds(self, val1, val2)

Parse the time strings contained in val1 and set jd1, jd2

str_kwargs(self)

Generator that yields a dict of values corresponding to the calendar date and time for the internal JD values.

to_value(self[, parent, out_subfmt])

Return time representation from internal jd1 and jd2 in specified out_subfmt.

Attributes Documentation

cache

Return the cache associated with this instance.

jd1
jd2
jd2_filled
mask
masked
name = 'fits'
scale

Time scale

subfmts = (('date_hms', re.compile('(?P<year>\\d{4})-(?P<mon>\\d\\d)-(?P<mday>\\d\\d)T(?P<hour>\\d\\d):(?P<min>\\d\\d):(?P<sec>\\d\\d(\\.\\d*)?)(\\((?P<scale>\\w+)(\\((?P<realization>\\w+)\\))?\\))?$'), '{year:04d}-{mon:02d}-{day:02d}T{hour:02d}:{min:02d}:{sec:02d}'), ('date', re.compile('(?P<year>\\d{4})-(?P<mon>\\d\\d)-(?P<mday>\\d\\d)(\\((?P<scale>\\w+)(\\((?P<realization>\\w+)\\))?\\))?$'), '{year:04d}-{mon:02d}-{day:02d}'), ('longdate_hms', re.compile('(?P<year>[+-]\\d{5})-(?P<mon>\\d\\d)-(?P<mday>\\d\\d)T(?P<hour>\\d\\d):(?P<min>\\d\\d):(?P<sec>\\d\\d(\\.\\d*)?)(\\((?P<scale>\\w+)(\\((?P<realization>\\w+)\\))?\\))?$'), '{year:+06d}-{mon:02d}-{day:02d}T{hour:02d}:{min:02d}:{sec:02d}'), ('longdate', re.compile('(?P<year>[+-]\\d{5})-(?P<mon>\\d\\d)-(?P<mday>\\d\\d)(\\((?P<scale>\\w+)(\\((?P<realization>\\w+)\\))?\\))?$'), '{year:+06d}-{mon:02d}-{day:02d}'))
value

Convert times to strings, using signed 5 digit if necessary.

Methods Documentation

format_string(self, str_fmt, **kwargs)

Write time to a string using a given format.

By default, just interprets str_fmt as a format string, but subclasses can add to this.

mask_if_needed(self, value)
parse_string(self, timestr, subfmts)[source]

Read time and deprecated scale if present

set_jds(self, val1, val2)

Parse the time strings contained in val1 and set jd1, jd2

str_kwargs(self)

Generator that yields a dict of values corresponding to the calendar date and time for the internal JD values.

to_value(self, parent=None, out_subfmt=None)

Return time representation from internal jd1 and jd2 in specified out_subfmt.

This is the base method that ignores parent and uses the value property to compute the output. This is done by temporarily setting self.out_subfmt and calling self.value. This is required for legacy Format subclasses prior to astropy 4.0 New code should instead implement the value functionality in to_value() and then make the value property be a simple call to self.to_value().

Parameters
parentobj

Parent Time object associated with this TimeFormat object

out_subfmtstr or None

Output subformt (use existing self.out_subfmt if None)

Returns
valuenumpy.array, numpy.ma.array

Array or masked array of formatted time representation values