MOST Julian Date convention
         used in photometry files and in publications
         --------------------------------------------

The reduced light curve files in our Internal and Public Data
Archives contain times in fractional Julian Date (JD), starting
from a common zero-point of 2451545.0, corresponding to noon UT,
1 January 2000.  This is the reference date commonly used for
the time axes of light curve plots when MOST data are published
for the first time.

To recover the correct times from those plots or epochs from
tables in those publications, it is necessary to add to the date
numbers the offset value of 2451545.0.  This can lead to some
confusion, since it is common practice in astronomical papers to
truncate the JD values by 2450000.0, to provide the reader with
a more obvious connection to the full value of the date in a
graph or table.

The dates are correctly recorded in the data files in the MOST
Public Data Archives.

In the delta Ceti paper (Aerts et al. 2006), there are actually
errors in the reporting of the JD values of the MOST photometry
in the time axis labels of several figures and in a footnote to
Table 1.

Fig. 3:  The x-axis label should be "HJD - 2452845" instead of
"HJD - 2451300", since it is missing the additional offset of
1545 (2451545.0 - 2450000.0).

Fig. 4:  The x-axis label should be "HJD - 2451545" instead of
"HJD - 2450000" (as for Fig. 3).

Fig. 6:  The x-axis is labelled as "Time (days)" but it is not
explained in the caption that the time values are with respect
to the time of the first datum point in the light curve.

Fig. 7, (both panels):  These should have an x-axis label of
"HJD - 2451545" instead of simply "Time (days)" to be consistent
with the rest.

Table 1 - notes:  The time of the first measurement should be
HJD 2452922.140428, instead of HJD 2451377.140428 (which again
is missing the offset of 1545 days defined by the convention in
the MOST photometry file) and the phase convention is defined to
have maximum brightness correspond to phase 0.25.