Table 15.1: Calibration dependencies on Phase 2 parameter choices.
| Parameter |
Effect in pipeline calibration |
| Engineering MODE |
Not calibrated; receive raw data files only. |
| Available-but-unsupported MODE |
Calibrated through flat-fielding only; no 2-d rectification, cosmic-ray rejection (if applicable), flux calibration, or 1-d extraction. |
| MODE=ACQ or ACQ/PEAK |
Not calibrated; receive raw data files only. |
| MODE=TIME-TAG |
Data events are tabulated in rootname_tag.fits file with one binary table extension for each buffer read (determined by exposure time and BUFFER-TIME parameters). All raw data events are gathered into a single image, rootname_raw.fits, which is then passed through the normal calibration steps. |
| CCD only CR-SPLIT > 1
or Number_of_Iterations > 1
|
The number of imsets in the raw file equals CR-SPLIT or Number_of_Iterations. Raw file imsets are cosmic-ray rejected and summed before the bias, dark, and flat-fielding corrections are made, producing a rootname_crj.fits file. The individual imsets are also flagged for cosmic rays and processed without summing to produce a rootname_flt.fits file. |
| MAMA only Number_of_Iterations > 1
|
The number of imsets in the raw file equals Number_of_Iterations. Repeat exposure imsets are summed after flat-fielding and 2-d spectral extraction, producing a rootname_x2d.fits file. Note that 1-d spectral extraction data are not summed. |
| POS-TARG
|
Normal calibration processing. |
| PATTERN
|
Separate PATTERN step exposures are not associated with each other. Each PATTERN step exposure is processed through calibration independently. |
| WAVECAL=NO
|
The MSM position uncertainty is not taken into account in assigning the wavelength scale for the observations. |
| Target_Name=CCDFLAT
|
An internal STIS CCD flat field lamp exposure useful in post-pipeline processing to correct for fringing above ~7000 Å with gratings G750L and G750M. |
