SIMBAD references

A 0.5-200keV BeppoSAX spectrum of the non-pulsating high-mass X-ray binary 4U 1700-37 is presented. The spectrum is well characterized by the standard accreting pulsar model of an absorbed power-law with a photon index of 1.07±^0.02_0.03, sharply modified by an exponential cutoff above 5.9±0.2keV. The e-folding energy of the cutoff is 23.9±0.5keV. A soft bremsstrahlung component with a temperature of 0.2±0.1keV is also required, together with a narrow iron line at 6.5keV. Both continuum components are absorbed by a column of (5.1±0.2)x10²²atom/cm². There is some evidence for the presence of a broad cyclotron absorption feature at ∼37keV, although we cannot exclude the possibility that this is due to an incorrect modeling of the continuum, or instrumental effects. The hypothesis that the compact object is a neutron star rather than a black hole seems most likely.