2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/1293We present the first non-LTE model atmospheres for neutron stars (NS). We study their structure and NLTE effects on the emergent thermal radiation of old isolated NS.Proc. Pulsar Astronomy - 2000 and Beyond, IAU Coll. 177, 2 pages, 2 figuresAstrophysicstext