First all-flavor search for transient neutrino emission using 3-years of IceCube DeepCore data

• Published in: Journal of cosmology and astroparticle physics 2022-01, Vol.2022 (1), p.27
• Main Authors: Andeen, K., Anton, G., Bai, X., Barbano, A., Bay, R., Beatty, J.J., Bellenghi, C., Bradascio, F., Clark, B.A., Clark, K., Correa, P., Cowen, D.F., Dembinski, H., Dvorak, E., Evenson, P.A., Filimonov, K., Fischer, L., Franckowiak, A., Fritz, A., Fürst, P., Gallagher, J., Gerhardt, L., Goldschmidt, A., Gonzalez, J.G., Grant, D., Grégoire, T., Griffith, Z., Griswold, S., Gündüz, M., Halliday, R., Halve, L., Ha Minh, M., Hardin, J., Haungs, A., Helbing, K., Hoffman, K.D., In, S., Ishihara, A., Japaridze, G.S., Jeong, M., Joppe, R., Kappes, A., Kappesser, D., Karl, M., Karle, A., Kellermann, M., Kim, J., Kopper, C., Koskinen, D.J., Kurahashi, N., Kyriacou, A., Lanfranchi, J.L., Larson, M.J., Lauber, F., Leonard, K., Lucarelli, F., Meagher, K., Mockler, D., Naab, R., Nowicki, S.C., Olivas, A., O'Sullivan, E., Parker, G.K., Paudel, E.N., Pérez de los Heros, C., Pieloth, D., Porcelli, A., Przybylski, G.T., Raab, C., Rehman, A., Renschler, M., Reusch, S., Rhode, W., Richman, M., Rott, C., Sandroos, J., Sarkar, S., Schlunder, P., Schumacher, L., Seunarine, S., Silva, M., Soldin, D., Steuer, A., Tischbein, F., Tollefson, K., Toscano, S., Tosi, D., Tselengidou, M., Twagirayezu, J.P., Unland Elorrieta, M.A., Vandenbroucke, J., Verpoest, S., Walck, C., Watson, T.B., Weaver, C., Weldert, J., Wiebusch, C.H., Woschnagg, K., Wulff, J.
• Format: Article
• Language: English
• Subjects: Angular resolution; Emission; Emissions; Energy; Energy spectra; Flavors; gamma ray burst experiments; Muons; neutrino astronomy; neutrino experiments; Neutrinos; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Searching
• ISSN: 1475-7516; 1475-7516
• DOI: 10.1088/1475-7516/2022/01/027

Since the discovery of a flux of high-energy astrophysical neutrinos, searches for their origins have focused primarily at TeV-PeV energies. Compared to sub-TeV searches, high-energy searches benefit from an increase in the neutrino cross section, improved angular resolution on the neutrino direction, and a reduced background from atmospheric neutrinos and muons. However, the focus on high energy does not preclude the existence of sub-TeV neutrino emission where IceCube retains sensitivity. Here we present the first all-flavor search from IceCube for transient emission of low-energy neutrinos, focusing on the energy region of 5.6-100 GeV using three years of data obtained with the IceCube-DeepCore detector. We find no evidence of transient neutrino emission in the data, thus leading to a constraint on the volumetric rate of astrophysical transient sources in the range of ∼ 705-2301 Gpc -3 yr -1 for sources following a subphotospheric energy spectrum with a mean energy of 100 GeV and a bolometric energy of 10 52 erg.