The phase of the radio and X-ray pulses of PSR B1937+21

Details The phase of the radio and X-ray pulses of PSR B1937+21 The phase of the radio and X-ray pulses of PSR B1937+21

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004nuphs.132..596c&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 132, p. 596-599.

Physics

Nuclear Physics

3

Scientific paper

We present some results of an RXTE observation on PSR B1937+21, the fastest known millisecond pulsar (P~=1.56 ms). The pulse profile, detected up to ~20 keV, shows a double peak, with the main component much stronger than the other. The peak phase separation is 0.526+/-0.002 and the pulsed spectrum over the energy range 2-25 keV is well described by a power law with a photon index equal to 1.14+/-0.07. We find that the X-ray pulses are closely aligned in phase with the giant pulses observed in the radio band. This result suggest that giant radio pulses and X-ray pulses originate in the same region of the magnetosphere due to a high and fluctuating electron density that occasionally emits coherently in the radio band. The X-ray events, however, do not show any clustering in time indicating that no X-ray flares are produced.

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