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Discovery and Orbital Determination of the Transient X‐Ray Pulsar GRO J1750−27
1997
Astrophysical Journal
We report on the discovery and hard X-ray (20È70 keV) observations of the 4.45 s period transient X-ray pulsar GRO J1750[27 with the BATSE all-sky monitor on board CGRO. A relatively faint outburst (\30 mcrab peak) lasting at least 60 days was observed during which the spin-up rate peaked at 38 pHz s~1 and was correlated with the pulsed intensity. An orbit with a period of 29.8 days was found. The large spin-up rate, spin period, and orbital period together suggest that accretion is occurring
doi:10.1086/304740
fatcat:djymdljs6fazdaglnm3fulq3oe