Abstract
We analyse z source ‘GX 5-1’ observations for the lower kilohertz QPO of GX 5-1 for 2002 by the instrument of PCA (1.5-12keV) on board RXTE. We report the high QPO to low QPO for frequency ( 20HZ) analysis for QPO horizontal branch oscillations model and relate it to observations of source GX 5-1. During the 7 years data RXTE detected many x-ray intensity variations but in our analysis, we select data for 15/07/2002 the highest x-ray intensity to lowest x-ray intensity in 2002 of GX 5-1. Our analysis is about QPO, frequency, time period of high peak to low peak for 70018-02-03-00 observation id
)