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Finding Order in ESP Events?

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Presentation on theme: "Finding Order in ESP Events?"— Presentation transcript:

1 Finding Order in ESP Events?
C.M.S. Cohen R.A. Mewaldt, G.M. Mason, J.C. Kasper, I.G. Richardson, M.A. Lee, G.C. Ho Finding Order in ESP Events?

2 Introduction Spring 2008 AGU Meeting: ESP spectral properties
LWS Team Meeting September 16-18, 2008 Introduction Spring 2008 AGU Meeting: ESP spectral properties Selected events from Richardson list No CIRs, No SEP injections, Valid parameters 30 shocks Examined ULEIS hourly O intensities Selected events with clear 0.5 MeV/n peak within 2 hrs. after shock passage 15 events Combined ULEIS+SIS spectra Fit with E-R form to get break points for He-Fe Examined Q/M dependences Examined Ebreak(O) dependence on shock parameters

3 AGU Results Issues Resolutions ULEIS-SIS mismatch Missing SIS data
LWS Team Meeting September 16-18, 2008 AGU Results Issues ULEIS-SIS mismatch Missing SIS data ‘Bad’ fits = pre-event intensity Resolutions ULEIS corr. for saturation ?? Attempt to subtract pre-event intensity But for the AGU, I decided to press on…

4 Oxygen Ebreak vs shock parameters
LWS Team Meeting September 16-18, 2008 Oxygen Ebreak vs shock parameters No Correlations

5 Not systematic, Fe sometimes different
LWS Team Meeting September 16-18, 2008 Q/M Dependences Not systematic, Fe sometimes different

6 Q/M power-law index correlations
LWS Team Meeting September 16-18, 2008 Q/M power-law index correlations No Correlations

7 LWS Team Meeting September 16-18, 2008 ULEIS Saturation Wind/STEP used to determine He/CNO and then replace ULEIS He with scaled ULEIS O spectrum

8 Pre-event intensity corrections
LWS Team Meeting September 16-18, 2008 Pre-event intensity corrections O Increases not always seen in SIS data Increases not always seen at same time in ULEIS+SIS data Selection via O yields different events than selection via He Pre-shock peaks? Integration times? He

9 Pre-event intensity corrections
LWS Team Meeting September 16-18, 2008 Pre-event intensity corrections O Increases not always seen in SIS data Increases not always seen at same time in ULEIS+SIS data Selection via O yields different events than selection via He Pre-shock peaks? Integration times? He

10 Pre-event intensity corrections
LWS Team Meeting September 16-18, 2008 Pre-event intensity corrections O Increases not always seen in SIS data Increases not always seen at same time in ULEIS+SIS data Selection via O yields different events than selection via He Pre-shock peaks? Integration times? He

11 Event selection issues (current)
LWS Team Meeting September 16-18, 2008 Event selection issues (current) How to select events? Peak-shock timing Okay to be before shock arrival (how much)? How much after shock arrival is okay? With what tolerance do energies need to peak together? Increases How much is required? At what energy? For what element? Background How to determine? How to subtract?

12 Why different responses?
LWS Team Meeting September 16-18, 2008 Why different responses? Shock 1 V=733, R=2.17, Th=78 Shock 2 V=734, R=2.81, Th=51

13 Why different responses?
LWS Team Meeting September 16-18, 2008 Why different responses? Shock 1 V=733, R=2.17, Th=78 Shock 2 V=734, R=2.81, Th=51

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