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Searching for Orbital Periods of Supergiant Fast X-ray Transients

Stella, L.; Walter, R.; Bozzo, E. +2 more

Building on the currently active program of observing High Mass X-ray Binaries (HMXBs), we describe here a challenging extension of the project for experienced AAVSO observers who want to push their observing to the limit. A new subclass of HMXBs, the Supergiant Fast X-ray Transients (SFXTs), have been recently discovered in INTEGRAL data and are …