XTE 1118+480 Figure 2.

Figure 2. Mean light curve of the 5.853 c/d (0.17085 d) signal. A perfect sinusoid within measurement limits. However, it is noteworthy that all individual-night light curves show vastly more scatter, up to ~0.4 mag. The reason is that the star flickers violently on timescales of a few seconds or faster. Longer integrations smooth over this flickering, which - remarkably! - does not seem to extend to much lower frequencies.

Back