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News from search for steady-sources analysis

News from search for steady-sources analysis. Juan Pablo Gómez González. ANTARES Collaboration Meeting Strasbourg, November 2011. OUTLINE. Introduction: Search method description Simulation of pseudo-experiments Results: Performance Response to different source morphologies

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News from search for steady-sources analysis

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  1. News fromsearchforsteady-sourcesanalysis Juan Pablo Gómez González ANTARES Collaboration Meeting Strasbourg, November 2011

  2. OUTLINE Introduction: Search method description Simulation of pseudo-experiments Results: Performance Response to different source morphologies Event-by-event angular resolution Conclusions/Outlook 2 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  3. CHARGE CALIBRATION Likelihood implementation: Numerical maximization with Tminuit MGRAD 3 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  4. Likelihood Simulate higher number of pex to improve 5sigma level statistics (tail of the distribution) 4 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  5. Likelihood It also find (aproximatly) the number of injected events 5 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  6. Gaussianshape Different source extensions wrt the ANTARES PSF (s) 6 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  7. Response About 70% worst power for a 1º extended source 7 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  8. Discoverypotential Simulating signal events around the source following a 2D gaussian, or using the actual detector PSD Maximum effect on DP is only of ~5% Conclusion: our PSF is well described by a 2D Gaussian 8 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  9. Flat disc sourceshape Response to a different source shape: -> Signal events are simulated following a flat disc 9 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  10. CHARGE CALIBRATION Better performance for a flat disc source -- Gaussian shape -- Disc shape Explanation: Events are more concentrated in the peak(remove of the gaussian tail) events) ??? 10 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  11. RXJ1713 • Real case: Applied to RXJ 1713 morphology • To be done if Aart can provide me the 2D histogram for the • Pseudo-experiments generation 11 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  12. E-M comparison Results and comparison when using the E-M algorithm In progress… 12 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  13. Methodscomparison EM shows a better performance when extension of the source is higher than ~1 degree (wrt to the ANTARES PSF) 13 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  14. Event- Separating high energy events from low energy ones Separating well reconstructed events from badly reconstructed Angular error between reconstructed tack ant true neutrino direction for different range of the angular uncertainty estimate 14 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  15. Angular error estimate The angular uncertainty for each reconstructed track in the sample used is draw from the “beta” distribution 15 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  16. Angular error estimate Discovery potential when using (or not) the estimate on the angular uncertainty About 7% improvement on 3sigma (50% CL) discovery potential 16 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  17. Comparisons 17 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  18. FeldmanCousinsbelt Better performance than the EM method, which also finds the correct sigma Note that method B was ran over a larger sample (higher bghigher number of signal events to reach same discovery potential 18 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  19. FeldmanCousinsbelt Discovery potential at two confidence limits: 3  2.7 nsig 5  5.2 nsig (To have 50% probability of a discovery) 19 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  20. Fittedsignalevents Finds the correct number of signal events injected 20 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  21. FeldmanCousinsbelt Find where is the problem with it… 90% CL 68% CL 21 News from search for steady-sources analysis J.P. Gómez-González ANTARES C.M Strasbourg Nov. 2011

  22. CONCLUSIONS Work in progress: -- 22 Calibration systems of the ANTARES NT. J.P. Gómez-González VLVnT, Erlangen 2011

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