The Optical Counterpart of the Accreting Millisecond Pulsar Sax J1808.4–3658 in Outburst: Constraints on the Binary Inclination


We present multiband optical/infrared photometry of V4580 Sgr, the optical counterpart of the accretionpowered millisecond pulsar SAX J1808.4–3658, taken during the 1998 X-ray outburst of the system. The optical flux is consistent with emission from an X-ray–heated accretion disk. Self-consistent modeling of the X-ray and optical emission during the… (More)


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