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Table 1

HST/FOC observations.

Obs. ID Date YYYYmmdd Epocha (days) Filter Exposure (s) Center wavelength (Å) Starsb
X0C80102T 1990-08-24 1278 F175W 838 1720 2, 3, 6
X0C80103T 1990-08-24 1278 F175W 838 1720 2, 3, 6
X0C80106T 1990-08-24 1278 F501N 822 5010 2, 3, 4, 5, 6
X0C80107T 1990-08-24 1278 F501N 838 5010 2, 3, 4, 6

Notes. (a)Since 1987-02-23. (b)Stars used for image registration, see Fig. 1.

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