Presolar Grain Database - Graphite

The Presolar Grain Database (PGD) contains the vast majority of isotope data (published and unpublished) on presolar grains and was first released as a collection of spreadsheets in 2009. It has been a helpful tool used by many researchers in cosmochemistry and astrophysics. However, over the years, accumulated errors compromised major parts of the PGD. After a fresh start in 2019, it was rebuilt from the ground up and has been frequently updated. Here, we provide the PGD for graphite. The PGD is provided in two formats: (1) as Microsoft Excel (.xlsx) file, containing the main database as one large spreadsheet and additional information on extra spreadsheets, (2) as comma-separated ASCII (.csv) file containing the main database. The PGD is also available for silicon carbide (SiC) grains at the DOI 10.5281/zenodo.8187219.