Intra-pointing light curves of the first XMM-Newton observations (pn in green, MOS1 in black, MOS2 in red). The top, middle, and bottom panels show the light curves with 100 s, 500 s, and 1000 s time bins, respectively, while the left, central, and right panels display the total, soft, and hard light curves. The ordinates in cts s^-1 are given on the left side for the total light curves, but on the right side for the soft and hard light curves. In the bottom left panel, the best-fit linear trend is superimposed onto the pn data.