Basking is a term used by sympathizers of the Empire. Pilots occasionally take a photo of an Imperialship in front of a star or something bright.
It originates from Imperial stations with the phrase "Hail the Emperor. Bask in his Greatness" written above and below the mailslot. This refers to late Emperor Hengist Duval. When Arissa Lavigny-Duval became emperor, the phrase was updated to "Bask in her Greatness" and "Bask in her Glory."