SN 2010jl 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 \alpha \approx - 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 \alpha \approx - 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 .