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BHTOM-Team / bhtom2

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Different calibration when choosing GaiaSP/any and GaiaSP/UBVRI #213

Open kkotysz opened 3 weeks ago

kkotysz commented 3 weeks ago

Problems occurring when choosing different calibration methods. Same filters are matched but with different slope and zero point values. Possible variable in leakage in CPCS code. This is a critical error which completely messes up the light curves of certain targets, e.g. ASASSN-24fs for ROAD data

wyrzykow commented 2 weeks ago

I think I have almost identified the problem here. I noticed there is a different number of stars used between these two sets. Hence, the Ra-Dec filter works differently and there is more noise in the cross-match, which results in different zeropoint and sigma. I still need to find it in the code. But I'm waiting for the test server to operate, otherwise it will be hard to test any fixes.

astromiki commented 2 weeks ago

Even though there are different stars taken into account these two measurements should be very similar, unlike what we are getting now. It shows both limitations of the method and plausible errors in the approach itself. I would focus on the crossmatching/filtering part.