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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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Search for Neutrinos from Strong Variable Gamma Ray Sources

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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

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


Search for neutrinos from strong variable gamma ray sources

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


Search for neutrinos from strong variable gamma ray sources

M 87

Periode 1998/1999

83,4 Stunden

4,1 Sigma


Photons neutrinos protons from m87

M87

M 87

AMANDAII

Photons, Neutrinos & Protons from M87 ?

HEGRA


Search for neutrinos from strong variable gamma ray sources

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.


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