FITS keywords OBJCTRA and OBJCTDEC representation

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sunlover
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Joined: Tue Jun 04, 2019 3:28 pm

FITS keywords OBJCTRA and OBJCTDEC representation

Post by sunlover » Tue Jun 04, 2019 4:14 pm

Hello,

I'm using SharpCap 3.2.5990. Apparently SharpCap writes FITS keywords OBJCTRA and OBJCTDEC as decimal numbers (just like RA and DEC).

However the SBFitsExt documentation
https://heasarc.gsfc.nasa.gov/docs/heas ... tsExt.html
states that both keywords must be represented as strings.
OBJCTDEC
This is the Declination of the center of the image in degrees. The format for this is +25 12 34.111 (SDD MM SS.SSS) using a space as the separator. For the sign, North is + and South is -.

OBJCTRA
This is the Right Ascension of the center of the image in hours, minutes and seconds. The format for this is "12 24 23.123" (HH MM SS.SSS) using a space as the separator.

Some applications insist that these values must be in the string format.

It is a minor inconvenience, because I can remove these keywords from the file(s) before processing them with other applications.

Could you please change SharpCap so it writes these keywords as described in the SBFitsExt documentation.

Thanks,
Vitali

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admin
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Re: FITS keywords OBJCTRA and OBJCTDEC representation

Post by admin » Tue Jun 04, 2019 9:35 pm

Hi,

Thanks for that info – I wasn't aware that those particular fields had to be in degree/minutes/seconds format. I will try to make that change in a future version.

Cheers, Robin

sunlover
Posts: 11
Joined: Tue Jun 04, 2019 3:28 pm

Re: FITS keywords OBJCTRA and OBJCTDEC representation

Post by sunlover » Tue Jun 04, 2019 11:02 pm

Thanks, Robin! This is great.

Vitali

sunlover
Posts: 11
Joined: Tue Jun 04, 2019 3:28 pm

Re: FITS keywords OBJCTRA and OBJCTDEC representation

Post by sunlover » Sun Jul 14, 2019 4:32 pm

Hi Robin.

I've just noticed that you fixed this and now SharpCap writes OBJCTRA and OBJCTDEC correctly.
Thank you very much!

Cheers,
Vitali

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Re: FITS keywords OBJCTRA and OBJCTDEC representation

Post by admin » Mon Jul 15, 2019 9:25 pm

Hi Vitali

Glad that you found the change because I'd forgotten to come back here and post when the update was released :-)

Cheers, Robin

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