[vsnet-outburst 23960] TCP J21040470+4631129: brightening in quiescence prior to outburst

[Taichi Kato]

TCP J21040470+4631129: brightening in quiescence prior to outburst

   The Gaia data clearly indicate ~0.5 mag brightening
between 2014 and 2019.

http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia19dfe/

   This finding does not match the conclusion
by Kuulkers et al. (2011).
https://ui.adsabs.harvard.edu/abs/2011A%26A...528A.152K/abstract

   To me, it looks most likely that the result
by Kuulkers et al. (2011) was biased.  See discussion
in subsection 8.5 in Kato (2015) PASJ 67, 108.