Study investigates magnetic field of an extremely ultraluminous X-ray pulsar

Using NASA's Swift spacecraft and ESA's XMM-Newton satellite, astronomers have observed NGC 5907 ULX1--the most luminous ultra-luminous X-ray pulsar known to date. Results of the observational campaign, published February 7 on the pre-print server arXiv, shed more light on the magnetic field of this pulsar.