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Angular resolution: Critical for source morphology

Typical TeV beam size. Chandra SN 1006. J. Hiraga ASCA/Chandra. RXJ 1713. Angular resolution: Critical for source morphology. Angular resolution limit. perp. to B. E -1/2. Angular resolution how many photons are needed?. limited by photon stat. 100 GeV. limited by

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Angular resolution: Critical for source morphology

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  1. Typical TeV beam size Chandra SN 1006 J. Hiraga ASCA/Chandra RXJ 1713 Angular resolution:Critical for source morphology

  2. Angular resolution limit perp. to B E-1/2

  3. Angular resolutionhow many photons are needed? limited by photon stat. 100 GeV limited by shower fluct. 1 TeV Relative to PMT efficiency

  4. Resolution required for photon parameters adding NSB: modest effect Photon direction Photon position 1 TeV 1 TeV 10 m dish 20 m dish H.E.S.S.

  5. sy [m] sy [m] 2 TeV p 200 GeV p 1 TeV g 100 GeV g sy [m] sx [m] sx [m] Rejection: ~ 10-2 Background rejection: ProtonsScatter of (true) emission points Rejection: few 10-4 similar rejection obtained from fit (but low statistics)

  6. preliminary g e ~ 30% e Electron background Try to track primary electron: count all photons approaching reconstructed shower axis within 10 m above h=17 km Simulations: 1 TeV ephoton = 1% with NSB

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