The transient Be X-ray pulsar GRO J1750-27 was originally detected in 1995 by CGRO/BATSE during a giant outburst. After a long period of quiescence the source was detected in another outburst early 2008. Following this outburst with hard X-ray data from INTEGRAL and Swift, the orbital parameters have been confirmed and improved and a clear spin-up measured.For the first time the broad-band spectrum and pulse profile have been obtained, making it possible to estimate the source distance and the magnetic field strength. We discuss the evolution of the spectrum and pulse profiles over the outburst in 2008.
|Title of host publication||SIMBOL-X: FOCUSING ON THE HARD X-RAY UNIVERSE : Proceedings of the 2nd International Simbol-X Symposium|
|Place of Publication||Paris, France|
|Publisher||American Institute of Physics|
|Publication status||Published - 2009|