1. March 22 2005Julia Becker, Dortmund University March 22 2005 Prediction of Coincidence neutrino spectra from GRBs...and a comparison to average spectra

2. March 22 2005Julia Becker, Dortmund University Overview I.Short introduction to neutrino spectra I.The diffuse spectrum II.Burst samples: I.Neutrino flux parameters II.Coincidence and mean spectra III.Summary

3. March 22 2005Julia Becker, Dortmund University The bigger picture Pendleton, G. et. al. Astrophysical Journal, (1999)

4. March 22 2005Julia Becker, Dortmund University GRB Spectrum (I) e.g. Waxman/Bahcall, astro-ph/9807282

5. March 22 2005Julia Becker, Dortmund University GRB Spectrum (II) f  : fraction of proton energy going into pions f e : fraction of electron to proton total energy  per particle

6. March 22 2005Julia Becker, Dortmund University The WB Spectrum    Waxman/Bahcall, astro-ph/9807282

7. March 22 2005Julia Becker, Dortmund University Burst Samples  Variability: 568 bursts [Guetta et al.]  Lag: 292 bursts [Band et al.]  Subsample from variability sample: 82 bursts within AMANDA field of view

8. March 22 2005Julia Becker, Dortmund University Neutrino-Parameters (I) variability lag

9. March 22 2005Julia Becker, Dortmund University Neutrino-Parameters (II) variability lag

10. March 22 2005Julia Becker, Dortmund University Neutrino-Parameter (III) variability lag

11. March 22 2005Julia Becker, Dortmund University e.g. 82 single burst spectra: Log(  GeV/s/sr/cm**2) Log(E/GeV)

12. March 22 2005Julia Becker, Dortmund University …and the coincidence spectrum Log(  GeV/s/sr/cm**2) Log(E/GeV)

13. March 22 2005Julia Becker, Dortmund University Comparison of mean and coincidence spectra

14. March 22 2005Julia Becker, Dortmund University Sample comparison

15. March 22 2005Julia Becker, Dortmund University Summary and Conculsions  Two different burst samples  Basic model of WB  Difference: Adjust parameters to single bursts  Result: Samples differ from each other Samples show different spectra than WB Even average spectra are not consistent with WB

16. March 22 2005Julia Becker, Dortmund University The Future

17. March 22 2005Julia Becker, Dortmund University Upcoming internal report…  …preliminary version at app.uni-dortmund.de/~julia/  …to be finalized about a week after Easter

18. March 22 2005Julia Becker, Dortmund University Redshift estimators  Variability  Lag  Peak energy

19. March 22 2005Julia Becker, Dortmund University Variabilility Fenimore/Ramirez-Ruiz, astro-ph/0004176

20. March 22 2005Julia Becker, Dortmund University Temporal Lag Norris, astro-ph/0201503

21. March 22 2005Julia Becker, Dortmund University GRB1122 Energy Spectra    b = 149.5 ± 2.1 keV  = -0.968 ± 0.022  = -2.427 ± 0.07  bbbb Band et al., ApJ 413 (1993)

22. March 22 2005Julia Becker, Dortmund University Peak-Energy Amati, astro-ph/0205230

23. March 22 2005Julia Becker, Dortmund University Further reading and references  Reviews: Piran, astro-ph/0405503 Zhang & Meszaros, astro-ph/0311321  Experiments: http://heasarc.gsfc.nasa.gov/docs/heasarc/missions/ http://imagine.gsfc.nasa.gov/docs/sats_n_data/gamma_missions.html  Observations: Pendleton et al., ApJ, 1999 (Isotropic GRB distribution) Matheson et al., astro-ph/0307435 (SN-GRB connection) Band et al, ApJ 413, 1999 (Band fits to energy spectra)  On neutrinos from GRBs: Guetta et al., Astroparticle Physics 20, 2004 Halzen&Hooper, Rep. Prog. Phys. 65, 2002 Hardtke et al. for the AMANDA collaboration, ICRC Proc. 2003