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Search for Neutrinos from Strong Variable Gamma Ray Sources

Search for Neutrinos from Strong Variable Gamma Ray Sources. Wolfgang Rhode Dortmund. Challenge. 5 years of data taken with AMANDA Up to now: no extraterrestric signal found most interesting hint: from coincidence analysis with HEGRA. The Sky in TeV-Light 2003. ~ 5 variable sources

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Search for Neutrinos from Strong Variable Gamma Ray Sources

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  1. Search for Neutrinos from Strong Variable Gamma Ray Sources Wolfgang Rhode Dortmund

  2. Challenge • 5 years of data taken with AMANDA • Up to now: • no extraterrestric signal found • most interesting hint: from coincidence analysis with HEGRA

  3. The Sky in TeV-Light 2003 ~ 5 variable sources at the nothern hemisphere This plot could have been made by telescopes of a sensitivity of 1 single HEGRA telescope

  4. AGN FR-II /FR-I SSRQ FSRQ /BL Lac

  5. AMANDA II-n-Sensitivity vs. Mrk 501 Gamma-Ray-Flux Expected: 1 < g/n < 50 (KM) AMANDA B10 AMANDA II Sensitivity of 3 years of IceCube

  6. M 87 Periode 1998/1999 83,4 Stunden 4,1 Sigma

  7. M87 M 87 AMANDAII Photons, Neutrinos & Protons from M87 ? HEGRA

  8. AMANDA Fig1: Whipple data, Eth=600 GeV [2] Fig2: HEGRA data, Eth=1 TeV [1] From the analysis of 1ES1959+650 we have learned, that by coincident observations a singificant background (time) reduction (factor 10-100) becomes possible. GRB-analysis-like situation

  9. Proposal • Build (1–5) Atmopheric Cherenkov Telescopes, each roughly of the sensitivity of one of the old HEGRA telescopes. • Set them up at locations of existing ACTs (northern hemisphere preferred). • Operate them together with ACT collaborations.

  10. What about HESS, MAGIC, VERITAS ? • Possible: • (I) ACT looks on hotspots of the AMANDA/IceCube skymap • (II) IceCube adds confirmed ACT sources to its search catalogue • However: • New ACTs are very sensitive • CRAB visible within minutes • Long term observation of intense AGN not interesting • New ACTs are optimized for low (< 1TeV) energies will be done

  11. Telescope locations • Ontime is ~ 10%, • weather conditions -> different locations • MAGIC, VERITAS, HESS?, India???, ???? • Telescopes could be operated by existing crews • Observations around the clock possible

  12. Telescope properties • Mirror: 14 – 15 m2 • 5000 € / m2 ~ 75000 € • Mount: • 75000 € • Camera: 127 pixel, lightguide • Electronic within a box outside, container • Sum: 0,5 – 1 M€ / telescope • 1 – 6 telescopes needed (1,1*2,2*3, stereoscopic) • Help from MAGIC offered • Independend interest from HESS

  13. Cheap alternatives? • Where are the old HEGRA telescopes? • 1 mount is still at La Palma, electronics might be found, camera might still be in Heidelberg, could work again within 4 months. • 3 (?) Telescopes were handed over to US (BD), for high altitude tests. • Convince her to set them up at the VERITAS site?

  14. Conclusion • With comparably moderate expenses in terms of money and manpower, a significant improvement of the sensitvity can be reached.

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