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Re: [vsnet-campaign-ccd-discussion 32] Re: [vsnet-chat 5989] Re: (fwd) Re: [AAVSO-DIS] CCD-V Vs visual observations Dear Richard, > Users want the software to compute heliocentric correction. Users > want the software to compute a V-star magnitude based on the > magnitude of the C-star. If we did these things, key parts of the > photometric reduction would occur out of sight and beyond the user's > control, and there would be no way for the user to check the accuracy > of the result. Therefore in AIP for Windows, we will *not* do these > steps in the reduction -- these steps should be and must be the > responsibility of the observer because they are important parts of > the data reduction. It is nice to hear the policy of AIP for Windows to compute heliocentric corrections. But the existence of "JD heliocentric correction" in the AIP for Windows output headers brings some concern. Is this value an adjustable parameter by the user? Or the value is invariably zero as you have suggested? > JD calculated from image time plus half of exposure duration. > JD time zone correction added = 0 hours. > JD user correction (True - Log) applied = 0 seconds. > JD heliocentric correction added = 0 seconds. Regards, Taichi Kato
Return to the Powerful Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
