1 / 11

Gravitational lensing and neutrinos: results AWG, 26 November 2012

Gravitational lensing and neutrinos: results AWG, 26 November 2012. S. Mangano , J.P . Gómez-González. Preliminary. Introduction. Internal Note: Gravitational lensing and neutrinos (ANTARES-PHYS-2012-008).

anthea
Download Presentation

Gravitational lensing and neutrinos: results AWG, 26 November 2012

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Gravitational lensing and neutrinos: resultsAWG, 26 November 2012 S. Mangano, J.P. Gómez-González Preliminary

  2. Introduction Internal Note: Gravitational lensing and neutrinos (ANTARES-PHYS-2012-008) Recently we were authorized by the Collaboration to look for neutrinos from a list of gravitational lensing objects using the 2007-10 unblinded data sample

  3. Listofastrophysicalobjects

  4. Searchmethod • Maximum likelihood search method: It uses the event reconstructed direction, the number of hits for reconstruction and the angular error estimate information Likelihood function is numerical maximised with respect to ns using TMinuit A likelihood ratio is used as test statistics (λ)

  5. Summarytable No significant excess of events (over the expected background) was foud at any of the 11 locations selected

  6. Skymap

  7. Best cluster Cluster shape: J1004+4112 was taken from the SDSS Quasar Lens Search catalogue

  8. Cluster p-value In 80% of the only background pseudo-experiments is found a test statistic at least as high as the one we have observed

  9. Upperlimits Feldman-Cousins 90% CL upper limits were calculated for the 11 candidate sources

  10. Upperlimits Upper limits set on the neutrino flux from lensing objects (preliminary) Limits from the PS search with 2007-10 data

  11. Conclusions • A search for cosmic neutrino emission in correspondence with gravitational lensing objects has been conducted. • No excess of events was found at any of the 11 locations selected. • The lowest p-value has 80% probability to be produced by the background • The search motivation and the results obtained will be discussed in a paper being wrote by S.Mangano: A draft of this paper will be soon available

More Related