Burst-related pulse phase delay in the Bursting Pulsar

Details Burst-related pulse phase delay in the Bursting Pulsar Burst-related pulse phase delay in the Bursting Pulsar

Apr 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aps..apr.a1202s&link_type=abstract

American Physical Society, APS/AAPT Joint Meeting, April 18-21, 1997, abstract #A12.02

Physics

Scientific paper

Associated with each of the X-ray bursts from the Bursting Pulsar, GRO J1744-28, we observe a lag in the pulse arrival times which starts suddenly during the burst and persists for 1500 s after the burst. We observe a large (50 ms) phase shift which evolves continuously throughout the burst. Immediately after the bursts the pulse-arrival time lag is about 25 ms which then decays exponentially over several hundred seconds. Throughout the evolution of the phase lag, the pulse shape remains nearly perfectly sinusoidal. The observed phenomenon has been explained as the result of either changes in the accretion flow or motion of the crust of the neutron star though neither of these explanations agrees satisfactorily with the observation.

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