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astromatic / sextractor

Extract catalogs of sources from astronomical images
http://astromatic.net/software/sextractor
GNU General Public License v3.0
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psf photometry value diffierent with sdss FLUX_PSF #31

Open xiaoguaishoubaobao opened 1 year ago

xiaoguaishoubaobao commented 1 year ago

When I tested the value of the Sextractor detection and the comparison of the SDSS FLUX_PSF, I found that the value was almost different

But when I detect the Sextractor detection 1.4 ARCSEC, it will be much better, i fllow this I don’t know why I just tried to take it How do I get the same value as SDSS?

Please help me thank you

xiaoguaishoubaobao commented 1 year ago

Can anyone answer my question?

hbouy commented 1 year ago

I am not sure I understand your question. How large is the difference between the SDSS and SExtractor value? What do you mean by "detection 1.4 arcsec"? Do you mean an aperture of 1.4"? Note that I would expect small differences between the SDSS catalogue and the SExtractor photometry since the algorithms are not exactly the same...