Acharyya, A.Adams, C. B.Bangale, P.Benbow, W.Buckley, J. H.Capasso, M.Dwarkadas, V. V.Errando, M.Falcone, A.Feng, Q.Finley, J. P.Foote, G. M.Fortson, L.Furniss, A.Gallagher, G.Gent, A.Hanlon, W. F.Hervet, O.Holder, J.Humensky, T. B.Jin, W.Kaaret, P.Kertzman, M.Kherlakian, M.Kieda, D.Kleiner, T. K.Kumar, S.Lang, M. J.Lundy, M.Maier, G.McGrath, C. E.Millis, J.Moriarty, P.Mukherjee, R.Nievas-Rosillo, M.O'Brien, S.Ong, R. A.Patel, S. R.Pfrang, K.Pohl, M.Pueschel, E.Quinn, J.Ragan, K.Reynolds, P. T.Ribeiro, D.Roache, E.Ryan, J. L.Sadeh, I.Santander, M.Sembroski, G. H.Shang, R.Splettstoesser, M.Tak, D.Tucci, J. V.Weinstein, A.Williams, D. A.VERITAS collaborationMetzger, B. D.Nicholl, M.Vurm, I.2025-05-232025-05-232023Acharyya, A., Adams, C. B., Bangale, P., Benbow, W., Buckley, J. H., Capasso, M., Dwarkadas, V. V., Errando, M., Falcone, A., Feng, Q., Finley, J. P., Foote, G. M., Fortson, L., Furniss, A., Gallagher, G., Gent, A., Hanlon, W. F., Hervet, O., Holder, J., … Vurm, I. (2023). VERITAS and Fermi-LAT Constraints on the Gamma-Ray Emission from Superluminous Supernovae SN2015bn and SN2017egm. The Astrophysical Journal, 945(1), 30. https://doi.org/10.3847/1538-4357/acb7e6https://hdl.handle.net/1805/48351Superluminous supernovae (SLSNe) are a rare class of stellar explosions with luminosities ∼ 10–100 times greater than ordinary core-collapse supernovae. One popular model to explain the enhanced optical output of hydrogen-poor (Type I) SLSNe invokes energy injection from a rapidly spinning magnetar. A prediction in this case is that high-energy gamma-rays, generated in the wind nebula of the magnetar, could escape through the expanding supernova ejecta at late times (months or more after optical peak). This paper presents a search for gamma-ray emission in the broad energy band from 100 MeV to 30 TeV from two Type I SLSNe, SN2015bn, and SN2017egm, using observations from Fermi-LAT and VERITAS. Although no gamma-ray emission was detected from either source, the derived upper limits approach the putative magnetar's spin-down luminosity. Prospects are explored for detecting very-high-energy (VHE; 100 GeV–100 TeV) emission from SLSNe-I with existing and planned facilities such as VERITAS and CTA.enAttribution 4.0 Internationalshocksgamma-raysparticle astrophysicssupernovaeArticle