Erratum: Search for dark matter gamma-ray emission from the Andromeda Galaxy with the High-Altitude Water Cherenkov Observatory Erratum: Search for dark matter gamma-ray emission from the Andromeda Galaxy with the High-Altitude Water Cherenkov Observatory

The Andromeda Galaxy (M31) is a nearby (similar to 780 kpc) galaxy similar to our own Milky Way. Observational evidence suggests that it resides in a large halo of dark matter (DM), making it a good target for DM searches. We present a search for gamma rays from M31 using 1017 days of data from the High Altitude Water Cherenkov (HAWC) Observatory. With its wide fi eld of view and constant monitoring, HAWC is well-suited to search for DM in extended targets like M31. No DM annihilation or decay signal was detected for DM masses from 1 to 100TeV in the b (b) over bar, t (t) over bar, tau(+)tau(-), mu(+)mu(-), and W+W- channels. Therefore we present limits on those processes. Our limits nicely complement the existing body of DM limits from other targets and instruments. Speci fi cally the DM decay limits from our benchmark model are the most constraining for DM masses from 25TeV to 100TeV in the b (b) over bar and t (t) over bar channels. In addition to DM-speci fi c limits, we also calculate general gamma-ray flux limits for M31 in 5 energy bins from 1TeV to 100TeV.