X-ray emission from the nearby PSR B1133+16 and other old pulsars

O. Kargaltsev, G. G. Pavlov, G. P. Garmire

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We detected a nearby (d ≃ 360 pc), old (τ ≃ 5Myr) pulsar B 1133+16 with Chandra. The observed pulsar's flux is (0.8 ± 0.2) × 10-14 ergs cm-2 s-1 in the 0.5-8 keV band. Because of the small number of counts detected, the spectrum can be described by various models. A power-law fit of the spectrum gives a photon index Γ ≈ 2.5 and an isotropic luminosity of 1.4 × 1029 ergs s -1 in the 0.5-8 keV band, which is about 1.6 × 10-3 of the spin-down power Ė. The spectrum can also be fitted by a blackbody model with a temperature of ≈2.8 MK and a projected emitting area of ∼500 m2, possibly a hot polar cap. The X-ray properties of PSR B1133+16 are similar to those of other old pulsars observed in X-rays, particularly the drifting pulsar B0943+10.

Original languageEnglish (US)
Pages (from-to)406-410
Number of pages5
JournalAstrophysical Journal
Issue number1 I
StatePublished - Jan 1 2006

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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