Heliocentric Julian Date

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Heliocentric Julian Date

John DeMoor
Dr. Collins,
Our research group might have detected a bug in the software pertaining to the output of measurements when performing multi-aperture photometry.  We noticed that the column for heliocentric Julian date read NaN when we tried to process data, despite the keyword and a value being present the header of the .fits file.  We discovered that this problem can be fixed by editing the list of keywords in the aperture settings menu, specifically by deleting the first several words so that HJD_UTC was listed first.  We thought it would be beneficial to inform you of this problem and let others know how it could be remedied.  
Thank you.  
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Re: Heliocentric Julian Date

karenacollins
Administrator
Hi John,

Was there a space between the preceding comma and the H at the beginning
of HJD_UTC? The combination below has been working fine for me:

JD_SOBS,JD_UTC,HJD_UTC,BJD_TDB,ALT_OBJ,AIRMASS,CCD-TEMP

I haven't tried with a preceding space. If that is the problem, I'll
make a note to clean spaces from the front and back of the keywords  
when I get a chance.

If a space is not the problem, could you send me your AIJ_Prefs.txt file
so that I can see what is going wrong? I'm not sure which computing
platform/OS you are using, so I can't tell you where that file is
exactly, but the installation instructions in the AIJ download website
describes where the file lives for all platforms. if you can't find it,
send me info about your computing platform and OS.

Karen

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Re: Heliocentric Julian Date

John DeMoor
Dr. Collins,
The space appears to have been the problem.  I copied and pasted the combination that you wrote, and it worked fine.  
Thank you very much.
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