SUBROUTINE ERI_FOLD( NENER, ESPEC, NCHAN, RMFID, ARFID, : CSPEC, STATUS ) *+ * Name: * ERI_FOLD * Purpose: * Fold an energy spectrum through the instrument responses * Language: * Starlink Fortran 77 * Invocation: * CALL ERI_FOLD( NENER, ESPEC, NCHAN, RMFID, ARFID, CSPEC, STATUS ) * Description: * Folds the supplied energy spectrum through the energy response * supplied. The response is in the form of a redistribution matrix * and an area response. If the former is normalised then the second * object is required to convert to counts/cm**2. * * For details of how different forms of response are handled see the * ERI_FOLDN routine. * Arguments: * NENER = INTEGER (given) * Number of energy space bins for output spectrum * ESPEC[] = REAL (given) * Input energy space spectrum * NCHAN = INTEGER (given) * Number of channels in output spectrum. Used to check against * response * RMFID = INTEGER (given) * ADI identifier of RedistributionMatrix object * ARFID = INTEGER (given) * ADI identifier of AreaResponse object * CSPEC[] = REAL (returned) * The channel space spectrum * STATUS = INTEGER (given and returned) * The global status. * Examples: * {routine_example_text} * {routine_example_description} * Pitfalls: * {pitfall_description}... * Notes: * {routine_notes}... * Prior Requirements: * {routine_prior_requirements}... * Side Effects: * {routine_side_effects}... * Algorithm: * {algorithm_description}... * Accuracy: * {routine_accuracy} * Timing: * {routine_timing} * External Routines Used: * {name_of_facility_or_package}: * {routine_used}... * Implementation Deficiencies: * {routine_deficiencies}... * {machine}-specific features used: * {routine_machine_specifics}... * {DIY_prologue_heading}: * {DIY_prologue_text} * References: * ERI Subroutine Guide : http://www.sr.bham.ac.uk/asterix-docs/Programmer/Guides/eri.html * Keywords: * package:eci, usage:public, energy response, folding * Copyright: * Copyright (C) University of Birmingham, 1995 * Authors: * DJA: David J. Allan (Jet-X, University of Birmingham) * {enter_new_authors_here} * History: * 6 Feb 1995 (DJA): * Original version. * {enter_changes_here} * Bugs: * {note_any_bugs_here} *- * Type Definitions: IMPLICIT NONE ! No implicit typing * Global Constants: INCLUDE 'SAE_PAR' ! Standard SAE constants * Arguments Given: INTEGER NENER ! Number of energy bins REAL ESPEC(*) ! Energy spectrum INTEGER RMFID ! Redistribution INTEGER ARFID ! Area response INTEGER NCHAN ! Number of channels * Arguments Returned: REAL CSPEC(*) ! Channel spectrum * Status: INTEGER STATUS ! Global status *. * Check inherited global status. IF ( STATUS .NE. SAI__OK ) RETURN * Invoke vector routine CALL ERI_FOLDN( NENER, 1, ESPEC, NCHAN, RMFID, ARFID, : CSPEC, STATUS ) * Report any errors IF ( STATUS .NE. SAI__OK ) CALL AST_REXIT( 'ERI_FOLD', STATUS ) END