... arfgen (arfgen-1.54.7) [xmmsas_20030110_1802-5.4.1] . ... Generates an OGIP-compliant ([ 4 ]) ancillary response file (ARF). The ARF contains a table listing area values (the column SPECRESP ) for a number of different energy ranges (the columns ENERG_LO and ENERG_HI ). The ARF can be used in conjunction with the response matrix file (RMF, generated by rmfgen ) to allow fitting of particular spectral models against the observed spectral data. ... Encircled energy correction (point source) . ...