Swift J1753.5-0127 Rejuvenation in Feb 2017: Optical Timing

ULTRASPEC observations of J1753 on 2017 Feb 21, centred on UT 21:56. The panels show the ratio of target to comparison star counts (Top), and the raw comparison star counts (Bottom), as a function of time. Counts have been divided by 1000 for display.

Preliminary power spectrum of J1753 as seen by ULTRASPEC on 2017 Feb 21, averaged over 18 sections each 256 s in length. White noise has not been subtracted.