Deep searches for pulsations in SGR 1627-41 and 0526-66

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X-Ray Sources, X-Ray Bursts, Pulsars, Neutron Stars

Scientific paper

Deep searches for X-ray pulsations from SGR 1627-41 and SGR 0526-66 were performed with ASCA. SGR 1806-20 and 1900+14 were previously established as X-ray pulsars. SGR 0526-66 is suspected to be a strong candidate for a magnetar, but X-ray pulsation has not been confirmed yet. Detection of X-ray pulsations from SGR 1627-41 and SGR 0526-66, is the key issue to the unified magnetar model of the SGRs. Although ASCA has done the deepest observations of ~80 ks for both of them, we did not detect pulsations. The long-term period history of SGR 1900+14 is compared with a very similar change of the AXP pulsar 1E1048.1-5937. .

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