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FGS Instrument Handbook for Cycle 24 |
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While observing in Position mode, FGS3 serendipitously observed the outburst of a flare on the nearby star Proxima Centauri (Figure 3.6, 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), 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).