Gaia18bec What's this? There is a bright 2MASS source. 2MASS 183342.404 -141351.90 (2000.0) 9.750 8.785 8.304 Gaia18bec AT2018bgn 2018-05-05 19:19:01 278.42666 -14.23112 12.83 14.01 0.49 unknown 2018-05-07 11:24:08 Gaia Galactic plane source brightens by 1.8 mags and becomes bluer