The X-ray source SLX 1732-304 in the globular cluster Terzan 1: The spectral states and an X-ray burst

ART-P/Granat observations of the X-ray burster SLX 1732-304 in the globular cluster Terzan 1 are presented. The X-ray (3-20 keV) fluxes from the sourc e differed by more than a factor of 4 during the observing sessions on Sept ember 8 (F-X similar or equal to 6,95 x 10(-10) erg cm(-2) s(-1)) and Octob er 6, 1990(F-X similar or equal to 1.64 x 10(-10) erg cm(-2) s(-1)). The in tensity variations of SLX 17.32-304 were apparently accompanied by variatio ns in its hardness: whereas the source in its high state had the spectrum w ith a distinct exponential cutoff typical of bright low-mass X-ray binaries , its low-state spectrum could be satisfactorily described by a simple powe r law with a photon index alpha similar or equal to 1.7. During the ART-P o bservation on September 8, a type I X-ray burst was detected from SLX 1732- 304. (C) 2001 MAIK "Nauka/lnterperiodica".