TESS data on UV red dwarf V1513 Cyg shows clear periodicity and flares, as expected. However, ASAS-SN SP light curve has long gentle slope like LPV. Is it real brightness change of V1513 or it is effect of contamination by close companion?
I think this is caused by the large proper motion of the star, which slowly drifts out of the measuring aperture from the position used at the start of the series. This almost always the case for large-motion stars (about 1".5/year in this case).
\Brian
Wow! Thank you, Brian, for the exact expalnation! That’s why Simbad cross is misaligned!
But why Simbad gives for the dwarf 11.97B and 13.883V - I can not understand without contamination 
