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Gravitational lensing with neutrinosResults, paper and public plots

J.P. Gómez-González, S.Mangano, 21.2.2013

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Structure of the paper

1. Introduction 2. Gravitational Lensing of Photons and Neutrinos - One figure, eight equations3. ANTARES Detector and Neutrino Selection4. Potential Gravitational Lensed Neutrino Sources - One table, one figure5. Search for Neutrino Emission from Gravitational Lensed Sources - One table, one figure6. Summary

Referees: Véronique and Juande

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Gravitational lens list (public list)

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Skymap (public plot)

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Details of analysis presented by Juan Pablo and explained in his thesis

Maximum likelihood search method:

Likelihood function is numerical maximised with respect to ns using TMinuit

A likelihood ratio is used as test statistics (λ):

Search method uses:1. event direction 2. number of hits in track fit 3. angular error estimate

Search method

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Large separation quasar SDSS J1004+4112 is lensed by a galaxy cluster (see first slide)

No signal: Best cluster

X-ray image from Chandra project

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P-value calculation for most significant event

Unblind => λobs

Compare λobs with λ distribution of only background case

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No significant excess of events (over expected background) at any of 11 selected directions => upper fluxes

Upper limits (public list)

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Upper limits (public plot)

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Figure for theory chapter (public plot)Angular deflection for general lensing configuration

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Enjoy movie: Einstein and Eddington (BBC 2008)

Comparison of two superposed photographs from sky:- Night sky in normal conditions- Sky with an solar eclipse => Light deflection by sun

Sun

Star

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Search for cosmic neutrino emission within gravitational lensing objects

No excess of events at any of 11 selected locations

Paper soon ready

Presentation of public plots

Conclusion

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Backup

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