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XMM-Newton Science Analysis System


selectlib (selectlib-4.69) [xmmsas_20070708_1801-7.1.0]

Meta Index / Home Page / Description / Example expressions

Table filtering

These sample boolean expressions demonstrate the filtering of an event list table with columns RAWX, RAWY, PHA, PATTERNID, CCDID, PHASE, TIME, and FLAG:

• RAWX >= 100 && #ROW != 10
  select all events with X coordinates greater than or equal to 100; exclude the 10th event anyway
• RAWX > RAWY
  select all events to the right of the line RAWX==RAWY
• CIRCLE(354,383,84,RAWX,RAWY)||ELLIPSE(243,215,27,108,0,RAWX,RAWY)
  select events which lie in the circle or the ellipse with the specified parameters
• PATTERNID==4
  select all events with PATTERNID equal to 4
• (CCDID==1 && TIME in gti(ccd1.gti))||(CCDID==2 && TIME in gti(ccd2.gti))
  select all events from CCD #1 which pass the GTI filters in ccd1.gti plus all events from CCD #2 which pass the GTI filters in ccd2.gti.
• PHASE>=.3 && PHASE<=.9
  select events from the specified phase window
• (PHA>=100 && PHA<=200)||(PHA>=500 && PHA <=600)
  select events with PHA values greater than 99 and less than 201 or greater than 499 and less than 601
• FLAG & b110 != 0
  select events which have the second and third bit in an (integral) FLAG column set
• SELECTED && PHA >= 10
  select events which have been selected in the previous selection run and have PHA values greater than or equal to 10
• PHA in [0:10],(23:40),99,200: && TIME in gti(gti.fits[GTI0])
  select events with PHA values in the range 0-10, or 23-40 (excl.), or equal to 99, or greater than or equal to 200 and arrival times lying within Good-Time-Intervals contained in the table named GTI0 in the data set gti.fits
• skyvector(RA, DEC) in cone(#RA_MED, #DEC_MED, 20*#ARCMIN)
  select rows for which it is true that the J2000 sky vector constructed from the columns RA and DEC lies within a cone with an opening angle of 20' and a symmetry axis given through the sky vector defined by the two attributes #RA_MED and #DEC_MED