Do Standard Reduction of Data

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Description:

1. Read the science files for each mode as cataloged in the previous step.

2. Combine files of like mode to produce unfiltered event files.

3. Use the filter files to remove contaminated data. Data is rejected unless the following criteria are met:
   • Spacecraft was not in the South Atlantic Anomaly.
   • The object was more than 10 degrees away from the limb of the Earth.
   • The spacecraft was not in a region of low ( <= 6 GeV/c ) magnetic rigidity.
   • The spacecraft was in fine guidance mode.
   • The spacecraft was pointing within 0.01 degrees of the target.

   The following criteria are applied only to GIS data:

   • The event did not occur in the detector's noisy outer ring or calibration source.
   • The event fell in the proper region of rise-time - PHA space to be an actual photon.

   The following criteria are applied only to SIS data:

   • The telescope field of view contained the sky.
   • The object was more than 20 degrees above the limb of the bright (daytime) Earth.
   • The telemetry was not saturated.
   • Sufficient time had elapsed since the spacecraft left the South Atlantic Anomaly or went through a day-night transition. This amount of time depends on the number of CCDs used. For 1 CCD use 16s, for 2 CCDs use 32s, and for 3 or 4 CCDs use 64s.

4. Do some additional cleaning of the data. For the GIS this means filter the data using a PI - rise-time window. For the SIS this means removing the hot and flickering pixels.

5. For the GIS, create a detector image (in detector coordinates) of the filtered and cleaned data. For both SIS and GIS, create a sky map image of the filtered and cleaned data.

6. Remove any filtered event files which contain no events.

Associated Routines:

• xselect

Input Files:

• Science files: ft[date]_[start]_[end][G2/G3/S0/S1][index][mode][L/M/H].fits
• Filter files: ft[date]_[start]_[end].mkf

Output Files:

• Unfiltered event files: ad[sequence][g2/g3/s0/s1][index][mode][l/m/h//].unf
• Filtered event files: ad[sequence][g2/g3/s0/s1][index][mode][l/m/h//].evt
• GIS detector image files: ad[sequence][g2/g3][index][mode][l/m/h//].detimg
• Sky map files: ad[sequence][g2/g3/s0/s1][index][mode][l/m/h//].img
• xselect log files: ad[sequence][g2/g3/s0/s1][index][mode]xsel_log
• Job log: ad[sequence].joblog