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AGILE Workshop: Swift, Fermi, and Blazars

This workshop explores the Swift and Fermi observations of blazars, the most complete list of known blazars, and their contribution to cosmic backgrounds. It also highlights the increasing amount of simultaneous multi-frequency data and its role in testing physical models of blazars.

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AGILE Workshop: Swift, Fermi, and Blazars

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  1. Swift, AGILE and Fermi Blazars Paolo Giommi ASDC, Frascati Agenzia Spaziale Italiana, ASI AGILE workshop

  2. As of today ~3000 blazars are known The BZCAT blazar is the most complete and verified list of known blazars Massaro et al. 2009, arXiv:0810.2206 ~ 2837 blazars 1580 FSRQs 1005 BL Lacs 252 uncertain type About 1800 have been observed and detected by Swift On-line version at ASDC http://www.asdc.asi.it/bzcat

  3.   

  4. g-ray g-ray Radio Radio TeV TeV Microwave Microwave Optical Optical X-ray X-ray LBL Objects LBL Objects HBL Objects HBL Objects AGILE workshop

  5. 20,250 observations • 4,450 distinct pointings • ~400 sq deg of sky (~1%) > 2900 observations of 560 known blazars Unique database of optical/UV X-ray simultaneous data Swift observationsarchive content as of 20 April 2009 Over 10% of Swift time is dedicated to blazars AGILE workshop

  6. AGILE launch Fermi launch AGILE workshop

  7. Swift and Fermisimultaneous observations(Swift observartion date later than August 2008) Top ten list 776 observations of 246 distinct blazars ! AGILE workshop

  8. S5 0716+714Giommi et al. 2008 A&A 487L, 49 AGILE data Swift UVOT XRT AGILE workshop

  9. AGILE workshop

  10. Abdo et al 2009

  11. AGILE workshop

  12. Log peak = 12-13 Log peak ~ 14 Log peak = 15-17 Padovani & Giommi 1995 AGILE workshop

  13. AGILE workshop

  14. AGILE workshop

  15. AGILE

  16. EGRET

  17. Fermi LBAS (mean flux)

  18. Fermi LBAS (peak flux)

  19. Blazar -ray flux upper limits Fermi sensitivity vs spectral slope + + Fermi upper limits to -ray flux ox+ ro -> peak

  20. Fermi LBAS (mean flux) Lower limits from undetected Known blazars

  21. >15% at E > 20 keV ~10% at 1 keV x xackCB Blazar contribution to Cosmic Backgrounds Adapted from Giommi et al. 2006 A&A445,843

  22. Fermi LBAS (mean flux) Lower limits from undetected Known blazars

  23. AGILE workshop

  24. AGILE workshop

  25. Fermi bandpass Soft X-ray band AGILE workshop

  26. Swift continue to observe a very large number of blazars to complement the AGILE and Fermi -ray detections and upper limits; This rapidly increasing amount of simultaneous multi-frequency data is allowing us to test physical models of blazars in an umprecedented way; New, much larger and homogeneous samples of blazars are about to be produced by Fermi (-ray), SDSS(optcal) Swift (UV-Xray), and Planck (-wave) Detailed statistics is now becoming possible logN-logS, LF, evolution, contribution to cosmic background)… …but do not ignore BL lacs with no-redshift and watch out for strong selection effects reflecting blazars physics and instrumental features. Conclusions AGILE workshop

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