Fig. 2
Multiband light curves of 3C 454.3 at B (blue filled circles) and R (red filled circles) bands from EST and TNT on August 14, 2007 (JD = 2 454 327.1854–2 454 327.3514). One of the reference star’s light curves at B (blue crosses) and R (red crosses) bands are also plotted for comparison purpose. Errors are not more than 0.01 mag, thus are omitted for clarity.
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