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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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challenge
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
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

slide4
AGN

FR-II

/FR-I

SSRQ

FSRQ

/BL Lac

amanda ii n sensitivity vs mrk 501 gamma ray flux
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

slide6
M 87

Periode 1998/1999

83,4 Stunden

4,1 Sigma

slide8

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

proposal
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.
what about hess magic veritas
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

telescope locations
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
telescope properties
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
cheap alternatives
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?
conclusion
Conclusion
  • With comparably moderate expenses in terms of money and manpower, a significant improvement of the sensitvity can be reached.