Spectral insights and evolutionary pathways of globular cluster ULX in NGC 1399: a two-decade X-ray and optical study. - Oh, Kwangmin; Dage, Kristen C; Bobrick, Alexey; Aydi, Elias; Bahramian, Arash; Goodwin, Adelle J; Haggard, Daryl; Irwin, Jimmy; Kundu, Arunav; Strader, Jay; Maccarone, Thomas J; Zepf, Stephen E (Monthly Notices of the Royal Astronomical Society, 2025)