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catsHTM: A Tool for Fast Accessing and Cross-matching Large Astronomical Catalogs

Soumagnac, Maayane T.; Ofek, Eran O.

Fast access to large catalogs is required for some astronomical applications. Here we introduce the catsHTM tool, consisting of several large catalogs reformatted into HDF5-based file format, which can be downloaded and used locally. To allow fast access, the catalogs are partitioned into hierarchical triangular meshes and stored in HDF5 files. Se…