TITLE: GCN CIRCULAR NUMBER: 41499 SUBJECT: GRB 250806A: Gemini observations of host galaxy candidate DATE: 25/08/22 16:12:48 GMT FROM: gsriniv2@umd.edu C. Sevilla (Cornell), G. Srinivasaragavan (UMD), D. A. Perley (LJMU), A. Y. Q. Ho (Cornell), A. Bochenek (LJMU) report: We observed the candidate host galaxy of GRB 250806A (Xie et al., GCN 41243, Malesani et al. GCN 41279) beginning UTC 2025-08-13 13:14:40 with the Gemini Multi-Object Spectrograph on Gemini North under program GN-2025B-Q-125 (PI: Srinivasaragavan). We use a 1 arcsecond slit, the R400 grating, and the GG455 filter. We obtained four exposures of 450 seconds each, two at a central wavelength of 520 nm and two at 525 nm. We obtain a redshift of 0.367 from galactic Hβ, [O II], and [O III] emission lines. At this redshift, using the 4 - 120 keV flux from Bouchet et al. (GCN 41287) and observed burst time of 20 seconds, we estimate the burst has an isotropic equivalent energy of ~ 8e49 erg. We thank the Gemini Contact Scientists and the Gemini Helpdesk for their assistance in observing and data reduction. View this GCN Circular online at https://gcn.nasa.gov/circulars/41499. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...