IRIS is not suitable calibrate the time series images ?

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Affiliation
American Association of Variable Star Observers (AAVSO)
Sat, 02/01/2014 - 14:42

 IRIS  calibrate my 904 pics -9 hour time series of UX UMA -  well, but the shooting time disappears from image in calibration process and is replaced with a creation time of calibrated image. And time sieries with image calibration time ...

Is there way to get around, and include shooting time in calibrated images??

 I downloaded trial version of MaximDL Pro5, but it choke 904 x 2.8M pics - it can eat only approx 100 pics at time..