This dataset supports the manuscript titled “Hypersoft X-ray Sources: A New Class of Luminous Cosmic Emitters”, submitted to a Journal on September 4, 2025. To reproduce the figures and access the source catalogs used in the study: Download and extract all ZIP folders into a single directory, along with the Jupyter Notebook "hypersoft_master.ipynb." Within the same directory, create a new folder named source_analysis. Move all galaxy-specific folders (e.g., M31, NGC3379, etc.) into this folder. Ensure that the CIAO (Chandra Interactive Analysis of Observations) software package is installed on your system. We recommend launching the Jupyter Notebook directly from within a CIAO environment. Follow the embedded instructions in the notebook to execute the full analysis workflow. A master catalog, hss_master_cat.fits, is provided. It includes: HSS coordinates Source counts X-ray fluxes and luminosities Bolometric luminosities Identified counterparts Phase transitions The metadata file embeded in the catalog (also printed in the end of the notebook) describes each column in detail. Running the complete notebook will also generate the master catalog in both FITS and CSV formats. Follow the embedded instructions in the notebook. The "plots" folder contains sample outputs for reference—these will be overwritten when you run the notebook. For any questions or technical issues, please contact the corresponding author.