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Proposed XRT Timing Patterns (18 Sept 2003)

Proposed XRT Timing Patterns (18 Sept 2003). We need: Event “islands” separated by blank pixels Smallest event “islands” possible (to minimize algorithm pile-up) Recognition and classification of all events up to 3 pixels wide Recognition and classification of all rejected patterns

yardley-rosario
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Proposed XRT Timing Patterns (18 Sept 2003)

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  1. Proposed XRT Timing Patterns (18 Sept 2003) • We need: • Event “islands” separated by blank pixels • Smallest event “islands” possible (to minimize algorithm pile-up) • Recognition and classification of all events up to 3 pixels wide • Recognition and classification of all rejected patterns • Algorithm needs: • Event patterns centered on maximum pixel • Constant pattern size • We can accomplish both by a small modification of Julian’s proposed event classification scheme. • In order to accommodate the PD 3 pixel off-centered events, we need a 7 pixel pattern • In order to minimize island size, we need “don’t care” pixels • “Don’t care” pixels should not be dropped from pixel list

  2. Proposed XRT Timing Patterns (18 Sept 2003) Valid Invalid 0 6 X X X X X X 1 7 X X X X WT 2 8 X X X X 3 9 X X X X PD 10 X 11 Valid for PD modes 4 X X 12 X 5 X X 13 14 15

  3. Problems with event recognition Potential problem with invalid “islands”: cannot remove from event list because you need them to classify adjacent pixels. Examples: 15 6 X X Can this be solved by retaining the pixels for invalid events in the event list? Will that cause other problems?

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