[1]Mereghetti S and Stella L 1995 Astrophys. J.
442 L17

[2] Kouveliotou C et al 1998 Nature 393 235

[3] Kouveliotou C et al 1999 Astrophys. J. 510
L115

[4] Woods P M and Thompson C 2006 Compact Stellar X-Ray
Sources (Cambridge: Cambridge University)

[5] Xu R X 2007 Adv. Space Res. 40 1453

[6] Chatterjee P, Hernquist L and Narayan R 2000
Astrophys. J. 534 373

[7] Chatterjee P and Hernquist L 2000 Astrophys. J.
543 368

[8] Wang Z, Chakrabarty D and Kaplan D L 2006 Nature
440 772

[9] Duncan R C and Thompson C 1992 Astrophys. J.
392 L9

[10] Thompson C and Duncan R C 1995 Mon. Not. R. Astron.
Soc. 275 255

[11] Thompson C and Duncan R C 1996 Astrophys. J.
473 322

[12] Hewish A, Bell S J, Pilkington J D, Scott P F and Collins
R A 1968 Nature 217 709

[13] Pacini F 1968 Nature 219 145

[14] Manchester R N and Taylor J H 1977 Pulsars (San
Francisco: Freeman)

[15] Lyne A G, Pritchard R S, Graham-Smith F and Camilo F 1996
Nature 381 497

[16] Allen M P and Horvath J E 1997 Astrophys. J.
488 409

[17] Ruderman M 1993 Isolated Pulsars ed van Riper K A,
Epstein R I, Ruderman M and Ho C (Cambridge: Cambridge University)

[18] Chen W C and Li X D 2006 Astron. Astrophys.
450 L1

[19] Lyne A G, Shemar S L and Graham-Smith F 2000 Mon.
Not. R. Astron. Soc. 315 534

[20] Aschenbach B, Egger R and Trumper J 1995 Nature
373 587

[21] Lin J R and Zhang S N 2004 Astrophys. J. 615
L133

[22] Iwasawa K, Koyama K and Halpern J P 1992 Publ.
Astron. Soc. Jpn. 44 9

[23] Colpi M, Geppert U and Page D 2000 Astrophys. J.
529 L29

[24] Smith F G 1999 Pulsar Timing, General Relativity,
and the Internal Structure of Neutron Stars ed Arzoumanian Z, Van
der Hooft F and van den Heuvel E P J) (Amsterdam: Netherlands)

[25] McCulloch P M, Hamilton P A, Royle G W R and Manchester R
N 1983 Nature 302 319

[26] McCulloch P M, Klekociuk A R, Hamilton P A and Royle G W
R 1987 Australian J. Phys. 40 725

[27] McCulloch P M, Hamilton P A, McConnell D and King E A
1990 Nature 346 822

[28] Dodson R G, McCulloch P M and Lewis D R 2002
Astrophys. J. 564 L85

[29] Dib R, Kaspi V M and Gavriil F P 2007 Astrophys. J.
666 1152

[29] Link B and Epstein R I 1997 Astrophys. J. 478
L91

[30] Gunn J E and Ostriker J P 1970 Astrophys. J.
160 979

[31] Gaensler B M, Slane P O,\,Gotthelf E V and Vasisht G 2001
Astrophys. J. 559 963

[32] De Luca A, Caraveo P A, Mereghetti S, Tiengo A and
Bignami G F 2006 Science 313 814

[33] Li X D 2007 Astrophys. J. 666 L81

[34] Xu R X and Qiao G J 2001 Astrophys. J. 561
L85

[35] Alpar M A, Ankay A and Yazgan E 2001 Astrophys.
J. 557 L61

[36] Menou K, Perna R and Hernquist L 2001 Astrophys. J.
554 L63