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XMM-Newton Science Analysis System


param (param-2.15) [xmmsas_20070708_1801-7.1.0]

Meta Index / Home Page / Parameter types

time

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.