NGC 931 sometimes suffers a solar X-ray leakage of the MAXI cameras.
For example, the big negative spike at MJD 56790 (2014.5.13) - 56794 (5.17)
The data is updated in every day.
The data was processed with version 7L, where both 1650V and 1550V data
Evaluation of the shadow of solar paddles are improved. This decreased the
number of dropping data points.
A-system camera 0 (gas leaking camera) is also used until 57900 MJD.
There, the flux has a large uncertainty (a few tens of % in 2-4 keV).
Even in 4-10 keV, the data have larger uncertainty than those in
the other normal cameras.
After 57900 MJD, A-system Camera 0 is no-longer used in version 7L,
and the data have smaller error bars, although data gaps appears
for some sources.
Light curve Data
README for light curve data