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Table 3

Standard deviations taken from the rapid photometry lightcurves of XTEJ1550-564 and of various stars from the field of view.

Ks filter V filter

XTEJ1550-564 0.099 XTEJ1550-564 0.074
Star #1 0.020 Star #1 0.051
Star #2 0.024 Star #2 0.065
Star #3 0.021 Star #3 0.098

Notes. The stars have a brightness similar to the one of XTEJ1550-564.

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