Useless
 Products

Home
 
 
 
 
 
    

Contact UI

Search UI

   



The
 UI Casual-T

(white shirt with
 black logo or
black shirt with
white logo)

Do Things Sometimes Seem Off Center To You?  

  Title: Eclectic Orbit Detector

01.02.02

 

 

Note For Eclectic Orbit Detector (EOD) Users: 

EOD data files contain data from only one of the two clusters but are not split further into on-source and off-source files. To create separate data files for further processing, you can use the ftool fselect. How exactly this is done depends on whether your EOD data are in science array or science event format. In both cases, fselect operates on the ClstrPosition column, but the selection criteria differ.

For EOD science array data, the values of ClstrPosition corresponding to the on-source position are 0 and 3 for 1.5-degree and 3-degree rocking, respectively. This means that to create a file containing only on-source data, the following fselect criterion should be used:

ClstrPosition.eq.0.or.ClstrPosition.eq.3
And to create the off-source file, use:
ClstrPosition.ne.0.and.ClstrPosition.ne.3
For EOD science event data, the values of ClstrPosition corresponding to the on-source position are 1 (or 65) and 8 (or 72) for 1.5-degree and 3-degree rocking, respectively. This means that to create a file containing only on-source data, the following fselect criterion should be used:
ClstrPosition.eq.1.or.ClstrPosition.eq.65.or.ClstrPosition.eq.65.or.
  ClstrPosition.eq.72
And to create the off-source file, use:
ClstrPosition.ne.1.and.ClstrPosition.ne.65.and.ClstrPosition.ne.65.and.
  ClstrPosition.ne.72

For example, to create the file event_off.fits containing only off-source data from the science event file FS50_3eb70b0-3eb8950:

kaah[16]% fselect
Name of FITS file and [ext#][] FS50_3eb70b0-3eb8950
Name of output FITS file[] event_0_off.fits
Selection Expression[] ClstrPosition.eq.1.or.ClstrPosition.eq.65.or.ClstrPosition.eq.65.or.
  ClstrPosition.eq.72

Following this procedure should eliminate any difficulties you might be experiencing. 

Related Documents

 
  Home | About UI | Products | Investors | Community Forum | Customer Support | Careers
 

 

 

Copyright 2002 Useless Industries - Only Some Rights Reserved

.

Useless Industries is John Powell Robert Stacy Robert Spande