Detection of X-ray Eclipses from the Accreting Millisecond X-ray Pulsar SWIFT J1749.4-2807

Astronomy and Astrophysics – Astronomy

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X-Ray, Request For Observations, Binaries, Neutron Stars, Pulsars, Transients

Scientific paper

RXTE continues to perform pointed observations of the accreting millisecond X-ray pulsar SWIFT J1749.4-2807 (ATEL #2548, #2565, #2567), known to be in a binary system with 8.82 hr orbital period (ATEL #2568, #2569). The RXTE PCA X-ray light curve shows a steady decline, at a rate of about 1 mCrab per day, with two clear dips in the X-ray light curve. When the X-ray light curve is folded on the X-ray orbital period (ATEL #2569), the dips occur near orbital longitude 90 degrees (as measured from the ascending node).

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