Transit–occultation identification in binary A

Determine which eclipse in binary A of TIC 433545934 is the transit and which is the occultation, given the photometric similarity of the primary and secondary eclipses and the scatter in the observations.

Background

Binary A consists of two nearly equal-temperature stars whose primary and secondary eclipses differ only slightly in depth. Although the eclipses show brief intervals of totality, the available photometric scatter prevents an unambiguous assignment of the transit and occultation events. The photodynamical solutions favor the primary star as both the hotter and larger component, but the observational identification remains uncertain.

References

But, due to the photometric scatter in the original observations, it is unclear which eclipse is the transit and which is the occultation.

TIC 433545934: The first 2+2 type doubly eclipsing binary with extra, mutual eclipses  (2608.13034 - Borkovits et al., 13 Aug 2026) in Section 6, System parameters