While observing in Position mode, FGS3 serendipitously observed the outburst of a flare on the nearby star Proxima Centauri (Figure 3.6, Flare Outburst of Proxima Centauri as Observed with FGS3
, see Benedict et al. 1998). The FGS has also been used to measure the relative flux of a star during an occultation of that star by the Neptunian moon Triton (Figure 3.7, Triton Occultation of the Star TR180 as Observed by FGS 3
), and the data were subsequently used to examine the thermal structure of Triton’s atmosphere (see Elliot et al. 1998 and Elliot et al. 2000).