This note documents the Epoch 2 background model files. Both the faint (L7_240) and bright (Sky_VLE) source background model files are available,

The names of the model files are

faint sources:
pca_bkgd_faintl7_e2v19990824.mdl
pca_bkgd_faint240_e2v19990909.mdl

bright sources:
pca_bkgd_skyvle_e2v19990916.mdl
pca_bkgd_allskyactiv_e2v19990917.mdl

These models are based on the equivalent Epoch 3 model. Two adjustments are made: (a) the Epoch 3 PHA channel boundaries are adjusted to match the Epoch 2 energy scale, and (b) the Epoch 3 L7/VLE count rate is adjusted to match the expected Epoch 2 L7/VLE count rate.

Both models were tested on sources from which no signal is expected above 40 keV. The background subtracted count rates across the 40-80 keV band are given for the faint source and the bright source models.