Extinction curve derived in this work compared with extinction curves from the literature derived outside the GC. Left: Indebetouw et al. (2005) and Román-Zúñiga et al. (2007). Centre: Damineli et al. (2016) and Fahrion & De Marchi (2023). Right: dust grain models from Draine (2003) for R_V = 3.1 and R_V = 5.5, and from Hensley & Draine (2023), generated using the dust_extinction package (Gordon 2024). We translated the extinction curves to our reference filter system. In the left and centre panels, the J-band extinction value and its uncertainty were obtained by interpolating our extinction curve. Uncertainties are not available for Damineli et al. (2016) and are therefore not shown.