[Aavso-photometry] RE: DSI Pro]

[Justin Pryzby]

> Dear Mr.Fabrizio,
> This is Nagai.
> 
> I think, the DSI Pro is the good equipment.
> And, the AutoStar makes the FITS file.
> But, Photographing time is not included in the FITS file.
It is there, but not written properly..

I'm looking at a file from Freddy of Netherlands, soul on IRC,
from some months back.  It has:

  INSTRUME= 'Deep Sky Imager'    / Imager Model
  TIME-OBS= '20:31:03'           / UTC Time
  DATE-OBS= '01/10/2005'         / UTC Date
  EXPTIME =                  16. / Total Exposure Time

I suspect that the reason some software might not know the date of
exposure is because the new and recommended format for date of
observation is in the style: 2005-12-30T23:59:58.

The exposure time is typically in seconds

The D/M/Y format is not allowed by the FITS standard [0] for files
written after January 1, 2000.  Also, I note that the DSI software is
using a 4 digit year where a 2 digit year is expected.

Justin

References

[0] http://archive.stsci.edu/fits/fits_standard/node40.html#SECTION00942000000000000000