TITLE: GCN CIRCULAR NUMBER: 43792 SUBJECT: SVOM alert sb26021801: LCO optical upper limit DATE: 26/02/21 14:13:23 GMT FROM: SVOM_group <svomgroup@bao.ac.cn> C. Wu (NAOC), A. Saccardi (CEA/Irfu), D. Turpin (CEA/Irfu), L.P. Xin (NAOC), and X.H. Han (NAOC) report on behalf of the SVOM mission team: We observed the field of sb26021801 (TAN et al., GCN 43778) with the LCO 1-m telescope, equipped with the Sinistro instrument, at both the Cerro Tololo Interamerican Observatory and the Teide Observatory (Tenerife). Our observation started on 2026-02-18 at 06:33:39 UT (about 78.35 min after the trigger) and we obtained 3x200 s exposures in the SDSS r and 3x200 s exposures in the Pan-STARRS z filters. In the stacked image, we do not detect any new source within the SVOM/ECLAIRs error box, in agreement with Fortin et al. (GCN 43783) and Konno et al.(GCN 43784). We measure the following upper limit calibrated against the PanSTARSS DR1 catalog, and not corrected for Galactic extinction: r > 22.1 AB (5-sigma, mid-time 83.35 min after the trigger) z > 20.2 AB (5-sigma, mid-time 85.38 min after the trigger). This project is funded by the SVOM collaboration. View this GCN Circular online at https://gcn.nasa.gov/circulars/43792. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...