... Creates an OGIP-compliant Ancillary Response File (ARF) for the source in question. ... Usage and Examples . Example 1: Point source . ... Example 3: Point source with explicit position . Example 4: Specifying an external detector map for an extended source . Example 5: Using an RMF dataset to specify the energy grid . ... Example 7: Getting the unvignetted ARF . Example 8: Finding the cross-region ARF . ... A detector map . ... Source Position . ... Encircled energy correction . ...