Status of Trigger Rate Studies Analysis Group meeting 27 January 2003 D. Wren S. Ritz.

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Presentation transcript:

Status of Trigger Rate Studies Analysis Group meeting 27 January 2003 D. Wren S. Ritz

2 Moving from pdrApp to GlastRelease: Fluxes and Trigger Rates Purpose: we want to use GlastRelease for background studies –onboard filter development –revisit ground-based background rejection so the first step is to verify the implementation of the background fluxes. => compare with pdrApp Look at backgndmaxpdr (orbit max) and backgndavgpdr (orbit average) composite fluxes: –Compare Fluxes (GlastRelease vs. pdrApp) –Compare L1T rates (GlastRelease vs. pdrApp) Tools: –Use rootplot (within FluxSvc package) to plot fluxes –Use GlastRelease event tuples to get L1T trigger rates

3 Update from Dec 9 meeting Dec 9: Most fluxes look good. Tools Useful Now: Still true Dec 9: Orbit avg and orbit max CR proton fluxes broken (cremeavg and chimemax) Now: Chimemax fixed. Cremeavg broken, but problem found. Should be fixed this week Dec 9: Galactic electrons not implemented Now: Should be implemented this week Dec 9: Nested composite sources not working Now: Working

4 Backgndavgpdr flux plots Last meeting we had this (Gleam v4r1) Now we have this (GlastRelease v0r3) We want to see this (pdrApp) And still need galactic electrons Cremeavg (green) looks better. Nested composite sources now working (lavender). …but backgndavgpdr composite low above.5 GeV (red).

5 backgndavgpdr fluxes from rootplot Flux Type Integrated Flux (kHz/m^2) in GlastRelease Integrated Flux (kHz/m^2) in pdrApp backgndavgpdr 4.2 Breakdown: cremeavg0.94 albedo_proton_avg1.2 albedo_gamma0.92 albedo_electronpositron avg_total X albedo_electronpositron _total 1.1

6 Current Backgndavgpdr L1T Rates – cremeavg is low TotalCremeavgalbedo_p_avgalbedo_gammaelectronavgalbedo_e+e-avg GlastRelease Flux (kHz/m^2) NA1.1 L1T rate (Hz) NA803 L1T (fract) NA0.38 TKR rate (Hz) NA797 CAL-LO rate (Hz) NA10 CAL-LO and NOT TKR NA6 CAL-HI rate (Hz)10901NA0 CAL-HI and NOT TKR NA0 pdrApp* Flux (kHz/m^2) L1T rate (Hz) L1T (fract) TKR rate (Hz) CAL-LO rate (Hz) CAL-LO and NOT TKR CAL-HI rate (Hz) CAL-HI and NOT TKR *Known to be high due to old CAL-LO trigger

7 backgndmaxpdr flux plots Gleam and GlastRelease are similar Galactic electrons not implemented Otherwise, good agreement

8 backgndmaxpdr fluxes from rootplot Flux Type Integrated Flux (kHz/m^2) in GlastRelease/Gleam Integrated Flux (kHz/m^2) in pdrApp backgndmaxpdr 9.9 chimemax4.2 albedo_proton_max2.6 albedo_gamma0.92 electronmaxX0.043 albedo_electronpositron _total 2.2

9 Current Backgndmaxpdr L1T Rates – chimemax fixed Last Time (Gleam)Totalchimemaxalbedo_p_maxalbedo_gammaelectronmaxalbedo_e+e- Flux (kHz/m^2) NA2.2 L1T rate (Hz) NA1782 Now: GlastRelease L1T rate (Hz) NA1598 L1T (fract) NA0.14 TKR rate (Hz) NA1588 CAL-LO rate (Hz) NA17 CAL-LO and NOT TKR NA10 CAL-HI rate (Hz) NA0 CAL-HI and NOT TKR16 00NA0 pdrApp Flux (kHz/m^2) L1T rate (Hz) L1T (fract) TKR rate (Hz)11221 CAL-LO rate (Hz)5297 CAL-LO and NOT TKR1913 CAL-HI rate (Hz)84 CAL-HI and NOT TKR10

Summary Most of the flux components look OK. Tools are very useful. However, do not use GlastRelease for background studies: –Still a problem with orbit avg CR proton fluxes (cremeavg), and CR electron fluxes not yet implemented. Backgndavgpdr is impossibly low above 0.5 GeV in rootplots flux plot. Related to broken cremeavg? Will see in next few days Remaining fluxes to be fixed/implemented within days