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1 Gravitational lensing with neutrinos Results, paper and public plots J.P. Gómez-González, S.Mangano, 21.2.2013.

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Presentation on theme: "1 Gravitational lensing with neutrinos Results, paper and public plots J.P. Gómez-González, S.Mangano, 21.2.2013."— Presentation transcript:

1 1 Gravitational lensing with neutrinos Results, paper and public plots J.P. Gómez-González, S.Mangano, 21.2.2013

2 2 Structure of the paper 1. Introduction 2. Gravitational Lensing of Photons and Neutrinos - One figure, eight equations 3. ANTARES Detector and Neutrino Selection 4. Potential Gravitational Lensed Neutrino Sources - One table, one figure 5. Search for Neutrino Emission from Gravitational Lensed Sources - One table, one figure 6. Summary Referees: Véronique and Juande

3 3 Gravitational lens list (public list)

4 4 Skymap (public plot)

5 5 Details of analysis presented by Juan Pablo and explained in his thesis Maximum likelihood search method: Likelihood function is numerical maximised with respect to n s 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

6 6 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

7 7 P-value calculation for most significant event Unblind => λ obs Compare λ obs with λ distribution of only background case

8 8 No significant excess of events (over expected background) at any of 11 selected directions => upper fluxes Upper limits (public list)

9 9 Upper limits (public plot)

10 10 Figure for theory chapter (public plot) Angular deflection for general lensing configuration

11 11 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

12 12 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

13 13 Backup

14 14


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