Long-term X-ray light curves of SDSSJ1430+2303 since the Swift monitoring campaign. The count rates from Swift, Chandra, and NICER are shown with black dots and blue and red squares, respectively, which have been normalized in the overlapped time range. The Swift light curve of the nearby quasar, which has contaminated the NICER measurement, is also overplotted with yellow diamonds. We have also denoted the XMM-Newton and NuSTAR observing period with magenta and green vertical shadow regions.