  SN2010jl was a luminous Type IIn supernova (SN), detected in radio, optical,
X-ray and hard X-rays. Here we report on its six year R- and g-band light
curves obtained using the Palomar Transient Factory. The light curve was
generated using a pipeline based on the proper image subtraction method and we
discuss the algorithm performances. As noted before, the R-band light curve, up
to about 300 days after maximum light is well described by a power-law decline
with a power-law index of about -0.5. Between day 300 and day 2300 after
maximum light, it is consistent with a power-law decline, with a power-law
index of about -3.4. The longevity of the light curve suggests that the massive
circum-stellar material around the progenitor was ejected on time scales of at
least tens of years prior to the progenitor explosion.

High Energy Astrophysical Phenomena