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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
STATUS OF DATA ANALYSIS

Javier Rico for the IFAE group


Mispointing correction
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


Pedestal check
Pedestal check

Compare On and Off data pedestal RMS distributions


On off comparison
On-Off comparison

Length

Width

Length

Width

Conc

Conc

Conc1

Conc1

Alpha

Alpha


Optimization of the cuts
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


Alpha plots
Alpha plots

Crab February 15th

Mrk421 February 15th


Analysis summary

CRAB Feb

CRAB Mar

Mrk421 Feb

Mrk421 Feb


Discussion
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°)


Prospects

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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