2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/2466We have analysed the spectra and the variability of individual X-ray sources in the M-81 field using data from the available ROSAT-PSPC and ROSAT-HRI observations of this nearby spiral galaxy. Here we present the results on the second brightest source in the field (X-9 - Fabbiano, 1988 ApJ 325 544), whose identification and interpretation is still unclear. Our work includes the study of the shape of X-9 from HRI data, the light curve and hardness ratio evolution, and the spectral analysis.10 pages, 10 figures. To be published in the proceeding of "X-ray Astronomy 2000" (Mondello (Palermo), September 2000); added aknowledgementsAstrophysicstext