TITLE: GCN CIRCULAR NUMBER: 44391 SUBJECT: GRB 250530A: VLT/X-shooter host galaxy redshift z = 1.486 DATE: 26/04/22 15:42:23 GMT FROM: Riccardo Brivio at INAF-OAB <riccardo.brivio@inaf.it> A. Saccardi (CEA/Irfu), S. D. Vergani (LUX-Paris Obs.), D. B. Malesani (DAWN/NBI and Radboud), R. Brivio (INAF/OAB), N. Habeeb (U. Leicester), J.-L. Atteia (IRAP) report on behalf of the Stargate collaboration: We observed the object visible in the Legacy Survey underlying the position of the optical/NIR afterglow (D'Avanzo et al., GCN 40588; Rayson et al. GCN 40589) of the SVOM GRB 250530A (Wang et al., GCN 40576) using the ESO VLT UT3 (Melipal) equipped with the X-shooter spectrograph. A spectrum covering the wavelength range 3000-21000 AA was secured, with a total exposure time of 4x600 s in each of the UVB, VIS, and NIR arms. Our observation started at 00:32:26 UT on 2026 April 22, i.e. about 326.75 days after the SVOM trigger. Clear emission lines are detected in the visible and near-infrared arms, which we identify as [N II] 6584, H-alpha, the [O III] 4959, 5007 doublet, H-beta, and the [O II] 3726, 3729 doublet, all at a common redshift of z = 1.486. We suggest this to be the redshift of the host galaxy of GRB 250530A. We acknowledge excellent support from the ESO staff in Paranal, in particular Matias Jones, Felipe Gaete, Luciano Sbordone, and Boris Haeussler. View this GCN Circular online at https://gcn.nasa.gov/circulars/44391. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...