1. Many facets of Neutron Stars Astrosat and beyond Biswajit Paul Raman Research Institute, Bangalore

2. Many facets of Neutron Stars Astrosat and beyond Different varieties of neutron stars X-ray binary studies Orbital evolution of X-ray binaries Accretion torque Quasi periodic oscillations in accreting X-ray pulsars Self absorption in X-ray and dips in the pulse profiles Cyclotron scattering resonance feature, pulse phased studies Thermonuclear bursts, X-ray reprocessing Future Astrosat X-ray polarimeter

3. Rotation Powered : Ordinary and Millisecond Pulsars Different Types of Neutron Stars

4. Magnetars Different Types of Neutron Stars

5. Accretion Powered Different Types of Neutron Stars

6. Why study orbital evolution Single star evolution is different from binary evolution End products : Double compact binaries (Gravitational wave, GRBs) Stellar physics!!

7. Orbital Evolution HMXBs LMC X-4 SMC X-1 Cen X-3 4U 1538-52 Be-XRBs 4U 0115+63 LMXBs Her X-1 SAX J1808.4-3658 4U 1822-37 XTE J1710-281 Conservative mass transfer Mass transfer + mass loss Tidal effect Gravitational wave radiation

8. Measurement Techniques Pulse timing (Broad pulse, jitters, absorption, statistics) Eclipse timing (Pre-eclipse dips) Orbital modulation (Stability of modulation pattern) Spectroscopic (HMXB ? X-ray Irradiation ?)

9. Orbital Evolution of HMXB Pulsars Evolution time scale ~10 5-6 years  Tidal effect

10. Apsidal advance in 4U 0115+63 4U 0115+63: 24.3 days Ecentricity: 0.34, apsidal rate: 0.06+-0.02 Raichur and Paul 2010

11. Probing the Stellar Structure

12. Eclipse timing: XTE J1710-281

13. Jain and Paul 2010

14. Eclipse timing: EXO 0748-676 Wolff et al. 2009

15. Orbital evolution of X-ray binaries LMC X-4 CenX-3SMC X-14U 1538-52 4U 1822-37 Her X-1 XTE J1710-281 Cyg X-3 XTE J1808-5635

16. Disk Magnetosphere Interaction Ghosh and Lamb 1979

17. QPOs: Luminosity dependence A 0535+262: Finger et al., (1996), Ghosh (1996)

18. QPO Discoveries XTE J1858+034: Paul et al. (1998)4U 1907+09: Mukherjee et al. (2001) XTE J0111.2-7317 (Kaur al. 2007)

19. QPO Discoveries

20. QPO census SourceTypePulse freq QPO freqRatio KS 1947+300HMXB/Be53200.38 SAX J2103.5+4545HMXB/?2.794415.77 A 0535+26HMXB/Be9.7505.15 V 0332+53HMXB/Be229510.223 4U 0115+63HMXB/Be277620.224 1A 1118-616HMXB/Be2.59236.8 XTE J1858+034HMXB/Be4.5311024.3 4U 1901+03HMXB/?361.91300.359 EXO 2030+375HMXB/Be242008.33 SWIFT J1626.6-5156 HMXB/Be65100015.38 XTE J0111.2-7317HMXB/B0.5-B1Ve32127039.68 GRO J1744-28LMXB2100200009.52 GX 304-1HMXB3.6312033 MAXI J1409-619HMXB2.019295 ----------------------------------------------------------------------------------------------------- SMC X-1HMXB/B01410100.0071 Her X-1LMXB806130.016 LMC X-4HMXB/O-type740.65-200.0087-0.27 Cen X-3HMXB/O-type207350.17 4U 1626-67LMXB130480.37 X PerHMXB/Be1.25445 4U 1907+09HMXB/OB2.276930.4

21. Magnetic Field Estimation with QPOs

22. James 2012 (PhD Thesis)

23. Dips in Pulse Profiles : Partial Covering Absorption 23

24. Dips in Pulse Profiles : Partial Covering Absorption 24

25. Dips in Pulse Profiles : Partial Covering Absorption 25

26. Accretion onto Neutron Star

27. Ghosh & Lamb, 1979 Frank, King and Raine: Accretion Power in Astrophysics

28. Fermi-GBM, CGRO-BATSE

29. From BATSE Bildstein et al. 1997

30. Fermi-GBM, CGRO-BATSE

31. 4U 1626-67: Period Evolution Camero-Arranz et al. 2010

32. 4U 1626-67: Light Curves 32 Aru Beri et al. 2013

33. 4U 1626-67: Pulse Profiles 33 Aru Beri et al. 2013

34. Accretion torque in 4U 1626-67 X-ray luminosity (mass accretion rate) is not the sole deciding factor in accretion torque How the disk couples to the magnet is also important

35. Accreting X-ray pulsars Spectrum 35

36. Pulsar Cyclotron lines

37. Cyclotron lines at different pulse phases

38. Pulsar Cyclotron lines Fundamental and harmonic ratio

39. Pulsar Cyclotron lines At Different Luminosities 4U 1907+09

40. Reprocessing of Thermonuclear X-ray Bursts

41. Thermonuclear X-ray Burst Reprocessing 41

42. Reprocessing Region ? Hynes et al. 2006

43. Reprocessing in EXO 0748-676: XMM-Newton Observations

45. X-ray Pulse Reprocessing 4U 1626-67: (Gayathri, Paul, Dipankar, Mohan, 2015)

46. Low mass X-ray binaries

47. ASTORSAT

48. Indian X-ray Astronomy Experiment (1996-2000)

49. c

50. Large Area X-ray Proportional Counter

51. LAXPC: Effective Area

52. Hard X-ray Quasi Periodic Oscillations

53. X-ray Polarimetry

54. Accreting X-ray Pulsars 54

55. Black Hole Accretion Disks 55

56. Rotation Powered Pulsars & Magnetars 56

57. 57

58. Detectors 58

59. 59

60. Deep Interplanetary Navigation with X-ray pulsars ISRO HQ - 22 Apr 2014 Becker et al. 2013

61. Deep Interplanetary Navigation with X-ray pulsars Becker et al. 2013