| Revision no. | Date | Comments |
| 1.0 | 02/02/98 | Makes use of the new LATEX templates |
| 1.1 | 07/09/98 | bringing of task description up to date |
| 1.2 | 26/05/99 | description up to date with 1st delivery (v1.0) |
| 1.3 | 28/05/99 | description up to date with V3 delivery (v1.1) |
| 1.4 | 08/06/99 | description up to date with V3 metatask delivery (v1.3) |
| 1.5 | 30/06/99 | up to date with V1.4 - more functionality and optional search parameters added |
| 1.6 | 16/09/99 | up to date with V1.8. Also new latex macros used |
| 1.7 | 17/11/99 | up to date with V1.12. - more functionality |
| 1.14-1.19.3 | 03/12/99-30/06/00 | New numbering scheme (in line with versions) |
| 1.20 | 28/08/00 | New numbering - production of badpixfind map |
| 1.21 | 15/09/00 | New numbering - energy filtering introduced |
| 1.22-1.26.1 | 26/09/00-09/02/01 | New numbering scheme (in line with versions) |
| 1.26.2 | 16/02/01 | New numbering - threshabovebackground and withfovmask described |
| 1.26.3 | 22/03/01 | New numbering - Warnings updated |
| 1.26.4-1.26.5 | 23/03/01-11/04/01 | New numbering scheme (in line with versions) |
| 1.27 | 20/10/01 | new CAL coordinate routines require double type variables |
| 1.28 | 16/01/02 | test harness enhancements |
| 1.29 | 15/05/02 | adapted to new parameter interface |
| 1.30 | 21/03/03 | new task parameteter `ccd' |