Solar System Science Flares and Solar Energetic Particles Terrestrial Gamma-Ray Flashes Cosmic-ray interactions with Earth, Sun, Moon, etc. Plans: Optimization.

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Presentation transcript:

Solar System Science Flares and Solar Energetic Particles Terrestrial Gamma-Ray Flashes Cosmic-ray interactions with Earth, Sun, Moon, etc. Plans: Optimization of GLAST flare response Solar Physics paper on GLAST capabilities

GLAST Solar Flare Response GLAST launch late in solar minimum Rise in solar activity ; peak (But remember 20 January 2005 flare—later discussion) Possible Solar Flare Mode Activate overall solar-flare capability when probability for X-class flare exceeds 5% in a 24 day period GBM trigger: Soft- spectrum burst detected <20 degrees from Sun; detectable flux > 1 MeV

GLAST action: ACD veto disabled Sun < 70 deg from Z-axis – Data analyzed from 4 central towers below first 4(?) layers. Return to normal mode in 1000 s or when GBM solar-side BGO rate < R. Sun >70 deg from Z-axis Calorimeter trigger: lowered energy threshold (~100 MeV). Return to normal mode in 1000 s or when GBM solar-side BGO rate < R.

Hardest flare ever detected in space. (near solar minimum!!)

Milagro Observation of >10 GeV Particles from Sun on 20 Jan 2005 GOES proton data >10 MeV >50 MeV >100 MeV Milagro scaler data > 10 GeV protons ~1 min rise-time ~5 min duration Milagro Observed > 10 GeV from the Solar Energetic Particle events on 6 November July April January 2005

2005 January 20 Gamma Ray Spectrum at Peak Very hard accelerated particle spectrum, s ~ 2.2, from annihilation and neutron capture line comparison. Lines?? RHESSI

Nuclear continuum dominates for hard spectra, masking the discrete lines. Just statistics or something fundamental? RHESSI SMM

7:01 UT X7.1 N14W61 Coronas-F Song

Pion peak?

Coronas observed pion radiation here. Is the long 511 keV flux tail due to newly revealed radioactive material?

Terrestrial flashes observed by RHESSI (David Smith) 1 ms duration; associated with lightening (sprites); discovered by BATSE; tens per day globally.

Summed TGF spectrum extending up to ~20 MeV; GLAST observations of Earth’s atmosphere?