GRANAT/ART-P observations of GX3+1: Type I X-ray burst and persistent emission

We present results of observations of the known LMXB source GX3+1 with the telescope ART-P on board GRANAT in the fall of 1990. A strong X-ray burst w as detected from the source on Oct. 14 when it was in the low X-ray state w ith a luminosity similar to 30% smaller than the normal one. That was only the second case for the whole history of its study when it exhibited such t ype of activity. We describe results of the source spectroscopy during the bunt and persistent State and discuss formation of its X-ray emission in th e accretion disk boundary Layer. It is noted that scattering on electrons p lays the dominant role in the emission processes.