1. Analysis of high magnification events on Q2237+0305 A Juan González-Cadelo, Rodrigo Gil-Merino & Luis J. Goicoechea (University of Cantabria)

2. 1’’ z LENS = 0.04 z SOURCE = 1.7

3. Observational data OGLE collaborationGLITP collaboration

4. Caustic crossing microlensing event? New information about parameters and models RESULTS International proyects OBSERVATIONAL DATA ANALYSIS SIMULATIONS Models Cosmology GL Theory

5. Observational data

6. Mixture of data I (OGLE+GLITP) Re-reduction of OGLE

7. Mixture of data II (OGLE+GLITP) Fit by minimization of  2

8. Microlensing modelization

10. Parameters & models I Cosmological model Friedman-Lemaitre’s Universe

11. Parameters & models II Lens plane model Mass of microlensesTransversal velocity of microlenses

12. Parameters & Models III Source plane model Geometry of the sourcecircular Intensity of source Uniform disk Standar accretion disk Gaussian disk

13. Uniform disk

14. Gaussian disk

15. Standar accretion disk

16. Observations Vs Simulations Test  2 Test 

18. Results I: Best parameters Parametrization Trayectories with  1 % of trayectories with  1 300010sts0236 % 1.1450.0021.141 300060sts0112 % 1.1470.0001.147 300060sts0236 % 1.1100.0101.083 600005sts031426 % 1.1090.0081.063 600010sts022750 % 1.1170.0031.091 600060stm0159 % 1.1430.0061.127 600060sts0212 % 1.1070.0001.107

19. Results II: Best source model SOURCE MODEL (intensity+size) Trayectories with  1 % of trayectories with  1 Standar accretion disk small 4991 % Standar accretion disk medium 59 %

20. Results III: Best microlenses model MICROLENS MODEL (velocity+mass) Trayectories with  1 % of trayectories with  1 36 % 47 % 1426 % 2750 % 611 %

21. Results IV: Caustic crossing? Parametrization Trayectories with  1 Number of caustic crossing events % of caustic crossing events for that parametrization 300010sts0233100 % 300060sts0111100 % 300060sts0233100 % 600005sts031400 % 600010sts0227 100 % 600060stm0155100 % 600060sts0211100 %

23. Future steps New observational data New magnification patterns New parametrizations