Time parameters allow times to be entered in a variety of different formats:
xxxx-xx-xxTxx:xx[:xx.xxx] (FITS date and time) jdxxxxxx.xxx (Julian day) mjdxx.xxx (modified Julian day) yxxxx.xxx (decimal year - Not yet implemented) [-]xxxx[.xxx] (seconds since XMM reference time) xxx xxx xx xx:xx:xx xxxx (calendar format)
where `x' is a single digit, `m','j',`d' and `T' are literal characters and square brackets denote optional items. The number of digits shown is not significant.
Examples:
1997-10-13T00:00:00.000 (FITS date and time) jd2450734.5 (Julian day) mjd50734 (modified Julian day) -6.912e+06 (seconds since XMM reference time) Mon Oct 13 00:00:00 1997 (calendar format)
Note: Times are accessed by the task as real values which represents the number of seconds since the XMM mission reference time.
