1. 25 ii 2011NASM1 Exploring the Crab Nebula with the Hubble, Chandra and Fermi Space Telescopes Roger Blandford KIPAC Stanford

2. Anasazi Indians 25 ii 2011NASM2

3. Charles Messier 25 ii 2011NASM3

4. Sam Okoye discovers compact radio source 25 ii 2011NASM4

5. Franco Pacini predicts Crab Nebula Powered by Neutron Star 25 ii 2011NASM5

6. Jocelyn Bell Discovers Pulsars 25 ii 2011NASM6

7. John Bahcall (1934-2005) 25 ii 2011NASM Astrophysicist Astronomical Leader Mentor to Young Scientists Champion of Hubble Space Telescope 7

8. Hubble Space Telescope 25 ii 2011NASM8

9. Chandra X-ray Telescope 25 ii 2011NASM9

10. 25 ii 2011NASM10 High Energy Astronomy! VERITAS/H.E.S.S. LIGO Ice Cube eV keV MeV GeV TeV PeV EeV ZeV Cosmic Rays Gamma-Rays X X Electromagnetic waves comprise particles called Photons Cosmic rays comprise mainly Protons and Electrons Radi o

11. 25 ii 2011NASM11 Fermi (the scientist and the telescope)

12. The Pulsing  -ray Sky Pulses at 1/10 th true rate 25 ii 201112NASM

13. 25 ii 2011NASM H.E.S.S. 13

14. Supernova Explosion 25 ii 2011NASM14 Supernova 1987a in Magellanic Cloud

15. Crab Nebula at Different Wavelengths 25 ii 2011NASM15

16. Optical and X-rays Combined 25 ii 2011NASM16

17. The Entire Spectrum 25 ii 2011NASM17 Radio Gamma Rays TeV Synchrotron Radiation Compton Scattering

18. Synchrotron Radiation Maximum Synchrotron Photon Energy ~ 100 MeV 25 ii 201118NASM ~0.01 Gauss 10 keV 10 TeV

19. Compton Scattering 25 ii 2011NASM19 0.1 eV Infrared Photon 10 TeV Electron 5 TeV Electron 5 TeV Gamma-rayPhoton

20. Neutron Star 25 ii 2011NASM20 Wilson Mass: 1.5 suns Radius: 10 km Density: million, billion x water Rotation Rate: 30 per second Magnetic Field: 1 trillion Gauss

21. Crab Pulsar 25 ii 2011NASM21

22. 25 ii 2011NASM22 Faraday’s Disk Magnet Conducting Disk Crank Voltage: 50 PetaVolts Current: 300 TeraAmps Power: 100,000 Suns

23. The Restless Crab Hester 25 ii 201123NASM

24. Fermi Flares 25 ii 201124NASM

25. Spectral Changes September Flare 4 day variation Synchrotron Radiation Compton Scattering 25 ii 201125NASM Synchrotron Radiation Limit

26. Where is the Flare? 25 ii 2011NASM26 Jet Torus Pulsar

27. Let’s Keep Exploring the Crab Nebula 25 ii 2011NASM27 Thank You