Searching for Extragalactic TeV Sources

We search for very-high-energy emission from extragalactic sources using six years of data from the High Altitude Water Cherenkov (HAWC) observatory. We use a published prescription to define a list of candidates from relatively nearby extragalactic radio-emitting X-ray sources. If no significant excess is found in the HAWC data, we determine flux upper limits at TeV energies using different empirical functions to extrapolate the spectra. We also use our analysis to constrain the physical parameters of the sources (e.g., energy cutoff, spectral index, etc.). We identify and present possible interesting candidates for further studies.