galactic and isotropic diffuse emission models gal$\_$2yearp7v6$\_$v0.fits and iso$\_$p7v6source.txt. All the point sources from *Fermi*-LAT second source catalog (2FGL) [@Nol12] within $20^{\circ}$ of 1ES 1218+304, including the source of interest itself were considered in source model file. Sources within the ROI were fitted with power law models with the normalization and spectral index as free parameters, while those beyond ROI had their model parameters frozen to those as reported in second source catalog [@Nol12]. An unbinned likelihood spectral analysis was performed to produce the light curve with the standard analysis tool *gtlike* implemented in Science-Tools software package. Since the source is not always detected at high statistical significance, we have produced the five day binned light curve with minimum statistical significance accepted for each time bin as TS $\ge$ 4, where TS is the test statistic defined as twice the difference of the log(likelihood) with and without the source respectively [@Mat96]. The time averaged spectrum of the source was obtained by fitting a power law model with the normalization as free parameter and spectral index set to the value obtained by integrating the data over entire period of observation in the energy range 100 MeV-100 GeV. The details of the 