The principal tasks used by integral package (integral) to perform INTEGRAL Data Reduction are in specred package. The INTEGRAL user can use this package to perform a lot of steps of the data reduction. But, in order to do: i) a first analysis of the INTEGRAL data quality during observing, ii) a on-line data reduction, and iii) 2D-image reconstruction, he would have to use the specific integral tasks (see chapter 3).
The steps required to the INTEGRAL Data Reduction are defined on the Table II and successively explained. At the Appendix I you can see the parameters that are recommended in the INTEGRAL data reduction. The user can use these or another (similar) parameters.
| Step | Goal | Package | Task/s |
| 1 | Bias Subtraction | ccdred | ccdproc |
| 2 | Aperture Definition and Trace | specred | apall |
| 3 | Scattered Light Correction | specred | apscatter |
| 4 | Flat-spectra Correction | specred | apflatten |
| 5 | Extraction | specred | apall |
| 6 | Thoughtput Correction | specred | msresp1d |
| 7 | Arc Line Identification | specred | identify, reidentify |
| and Dispersion Correction | refspectra, dispcor | ||
| setjd | |||
| 8 | Sky Subtraction | specred | skysub |
| 9 | Image combination | specred | scombine |
| 7 | Cosmic rays Rejection | images | lineclean |
| 8 | Image reconstruction | integral | int_map |