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STATUS OF DATA ANALYSIS

STATUS OF DATA ANALYSIS. Javier Rico for the IFAE group. Mispointing correction. The mispointing is measured from ZetaTau or UMa51 runs using DC ’s and/or pedestal RMS’s

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STATUS OF DATA ANALYSIS

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  1. STATUS OF DATA ANALYSIS Javier Rico for the IFAE group

  2. Mispointing correction • The mispointing is measured from ZetaTau or UMa51 runs using DC’s and/or pedestal RMS’s • The absolute value is considered constant and the position rotated using formulae from TDAS00-11 in a run by run basis using the q and  values from the run books

  3. Pedestal check Compare On and Off data pedestal RMS distributions

  4. On-Off comparison Length Width Length Width Conc Conc Conc1 Conc1 Alpha Alpha

  5. Optimization of the cuts Used cuts: size > 2000 ADC cnts 0.2° < dist < 1.1° length < 0.26° width < 0.12° Used ¼ of Mrk421 sample A

  6. Alpha plots Crab February 15th Mrk421 February 15th

  7. Analysis summary CRAB Feb CRAB Mar Mrk421 Feb Mrk421 Feb

  8. Discussion • FEBRUARY DATA (θ~30°, size > 2000 ADC cnts) • Rate p = 1.17, rate g = 0.1 Hz  Do not fit any energy threshold from MC • MARCH DATA (θ~30°, size > 2000 ADC cnts) • Increase of CR rate after cleaning in 50% • Increase of CR after cuts in 50% • Increase of g after cuts increased much more: 330% • Cut on size>2000 ADC counts would correspond to 1000 ADC counts from MC (~300phe)  that would mean Egth = 83 GeV • BUT, rate of p is 1.5 less than expected at 83 Gev (~2 Hz). Also rate of g is lower. Both point towards a threshold 83 GeV < Egth < 150 GeV (at θ~30°)

  9. Understand deeper our analysis: Why the inclusion of outer pixels decreases the sensitivity? Does it improve with the calibration? How do Hillas parameters change in March? Can we optimize cuts for March data? Lower down the threshold to 1000 ADC optimize cuts for different size bins Understand the evolution of the source position Use measured position when possible (Mrk421)  Javi López’s presentation Unfold the FOV rotation to understand other effects Prospects

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