Multi-wavelength Observations of M87 During the 2017 Event Horizon Telescope Campaign

In 2017, the Event Horizon Telescope (EHT) Collaboration succeeded in capturing the first direct image of the center of the M87 galaxy. To support the physical interpretation and modeling, the EHT Collaboration partnered with several international facilities in space and on the ground, to arrange an extensive, quasi-simultaneous multi-wavelength (MWL) campaign. We release the processed data from MWL observations of M87 in easily downloadable formats, as a legacy product of the EHT 2017 campaign on M87. In the paper associated with this data release, The EHT MWL Science Working Group et al. (2021), we present the most complete simultaneous, MWL spectrum of the active nucleus to date, as well as discuss the complexity and caveats of combining data from different spatial scales into a single broadband spectrum. In addition to the MWL spectrum as the primary data product, we also release machine-readable versions of other tables presented in the Appendix of the paper, intermediate data products of the X-ray analysis, and sampled posteriors of X-ray and MWL model parameters. A brief description of MWL observations and data processing is provided within the repository with further details presented in the associated paper.Please cite both the paper and the repository if using these data products in your publication.