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Search for sources of astrophysical neutrinos using seven years of IceCube cascade events

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Abstract
Low-background searches for astrophysical neutrino sources anywhere in the sky can be performed using cascade events induced by neutrinos of all flavors interacting in IceCube with energies as low as similar to 1 TeV. Previously we showed that, even with just two years of data, the resulting sensitivity to sources in the southern sky is competitive with IceCube and ANTARES analyses using muon tracks induced by charge current muon neutrino interactions-especially if the neutrino emission follows a soft energy spectrum or originates from an extended angular region. Here, we extend that work by adding five more years of data, significantly improving the cascade angular resolution, and including tests for point-like or diffuse Galactic emission to which this data set is particularly well suited. For many of the signal candidates considered, this analysis is the most sensitive of any experiment to date. No significant clustering was observed, and thus many of the resulting constraints are the most stringent to date. In this paper we will describe the improvements introduced in this analysis and discuss our results in the context of other recent work in neutrino astronomy.
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IceCube

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MLA
Aartsen, M. G., et al. “Search for Sources of Astrophysical Neutrinos Using Seven Years of IceCube Cascade Events.” ASTROPHYSICAL JOURNAL, vol. 886, no. 1, 2019, doi:10.3847/1538-4357/ab4ae2.
APA
Aartsen, M. G., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., … Zoecklein, M. (2019). Search for sources of astrophysical neutrinos using seven years of IceCube cascade events. ASTROPHYSICAL JOURNAL, 886(1). https://doi.org/10.3847/1538-4357/ab4ae2
Chicago author-date
Aartsen, M. G., M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, C. Alispach, et al. 2019. “Search for Sources of Astrophysical Neutrinos Using Seven Years of IceCube Cascade Events.” ASTROPHYSICAL JOURNAL 886 (1). https://doi.org/10.3847/1538-4357/ab4ae2.
Chicago author-date (all authors)
Aartsen, M. G., M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, C. Alispach, K. Andeen, T. Anderson, I. Ansseau, G. Anton, C. Arguelles, J. Auffenberg, S. Axani, P. Backes, H. Bagherpour, X. Bai, A. Balagopal, A. Barbano, S. W. Barwick, B. Bastian, V. Baum, S. Baur, R. Bay, J. J. Beatty, K.-H. Becker, J. Becker Tjus, S. BenZvi, D. Berley, E. Bernardini, D. Z. Besson, G. Binder, D. Bindig, E. Blaufuss, S. Blot, C. Bohm, M. Boerner, S. Boeser, O. Botner, J. Boettcher, E. Bourbeau, J. Bourbeau, F. Bradascio, J. Braun, S. Bron, J. Brostean-Kaiser, A. Burgman, J. Buscher, R. S. Busse, T. Carver, C. Chen, E. Cheung, D. Chirkin, K. Clark, L. Classen, A. Coleman, G. H. Collin, J. M. Conrad, P. Coppin, P. Correa, D. F. Cowen, R. Cross, P. Dave, J. P. A. M. de Andre, C. De Clercq, J. J. DeLaunay, H. Dembinski, K. Deoskar, Sam De Ridder, P. Desiati, K. D. de Vries, G. de Wasseige, M. de With, T. DeYoung, A. Diaz, J. C. Diaz-Velez, H. Dujmovic, M. Dunkman, E. Dvorak, B. Eberhardt, T. Ehrhardt, P. Eller, R. Engel, P. A. Evenson, S. Fahey, A. R. Fazely, J. Felde, K. Filimonov, C. Finley, A. Franckowiak, E. Friedman, A. Fritz, T. K. Gaisser, J. Gallagher, E. Ganster, S. Garrappa, L. Gerhardt, K. Ghorbani, T. Glauch, T. Gluesenkamp, A. Goldschmidt, J. G. Gonzalez, D. Grant, Z. Griffith, M. Guender, M. Guenduez, C. Haack, A. Hallgren, L. Halve, F. Halzen, K. Hanson, A. Haungs, D. Hebecker, D. Heereman, P. Heix, K. Helbing, R. Hellauer, F. Henningsen, S. Hickford, J. Hignight, G. C. Hill, K. D. Hoffman, R. Hoffmann, T. Hoinka, B. Hokanson-Fasig, K. Hoshina, F. Huang, M. Huber, T. Huber, K. Hultqvist, M. Huennefeld, R. Hussain, S. In, N. Iovine, A. Ishihara, G. S. Japaridze, M. Jeong, K. Jero, B. J. P. Jones, F. Jonske, R. Joppe, D. Kang, W. Kang, A. Kappes, D. Kappesser, T. Karg, M. Karl, A. Karle, U. Katz, M. Kauer, J. L. Kelley, A. Kheirandish, J. Kim, T. Kintscher, J. Kiryluk, T. Kittler, S. R. Klein, R. Koirala, H. Kolanoski, L. Koepke, C. Kopper, S. Kopper, D. J. Koskinen, M. Kowalski, K. Krings, G. Krueckl, N. Kulacz, N. Kurahashi, A. Kyriacou, Mathieu Labare, J. L. Lanfranchi, M. J. Larson, F. Lauber, J. P. Lazar, K. Leonard, A. Leszczynska, M. Leuermann, Q. R. Liu, E. Lohfink, C. J. Lozano Mariscal, L. Lu, F. Lucarelli, J. Luenemann, W. Luszczak, Y. Lyu, W. Y. Ma, J. Madsen, G. Maggi, K. B. M. Mahn, Y. Makino, P. Mallik, K. Mallot, S. Mancina, I. C. Maris, R. Maruyama, K. Mase, R. Maunu, F. McNally, K. Meagher, M. Medici, A. Medina, M. Meier, S. Meighen-Berger, T. Menne, G. Merino, T. Meures, J. Micallef, G. Momente, T. Montaruli, R. W. Moore, R. Morse, M. Moulai, P. Muth, R. Nagai, U. Naumann, G. Neer, H. Niederhausen, S. C. Nowicki, D. R. Nygren, A. Obertacke Pollmann, M. Oehler, A. Olivas, A. O’Murchadha, E. O’Sullivan, T. Palczewski, H. Pandya, V. Pankova, D., N. Park, P. Peiffer, C. Perez de los Heros, S. Philippen, D. Pieloth, E. Pinat, A. Pizzuto, M. Plum, Alessio Porcelli, P. B. Price, G. T. Przybylski, C. Raab, A. Raissi, M. Rameez, L. Rauch, K. Rawlins, I. C. Rea, R. Reimann, B. Relethford, M. Renschler, G. Renzi, E. Resconi, W. Rhode, M. Richman, S. Robertson, M. Rongen, C. Rott, T. Ruhe, Dirk Ryckbosch, D. Rysewyk, I. Safa, S. E. Sanchez Herrera, A. Sandrock, J. Sandroos, M. Santander, S. Sarkar, K. Satalecka, M. Schaufel, H. Schieler, P. Schlunder, T. Schmidt, A. Schneider, J. Schneider, F. G. Schroeder, L. Schumacher, S. Sclafani, D. Seckel, S. Seunarine, S. Shefali, M. Silva, R. Snihur, J. Soedingrekso, D. Soldin, M. Song, G. M. Spiczak, C. Spiering, J. Stachurska, M. Stamatikos, T. Stanev, R. Stein, P. Steinmueller, J. Stettner, A. Steuer, T. Stezelberger, R. G. Stokstad, A. Stoessl, N. L. Strotjohann, T. Stuerwald, T. Stuttard, G. W. Sullivan, I. Taboada, F. Tenholt, S. Ter-Antonyan, A. Terliuk, S. Tilav, L. Tomankova, C. Tonnis, S. Toscano, D. Tosi, A. Trettin, M. Tselengidou, C. F. Tung, A. Turcati, R. Turcotte, C. F. Turley, B. Ty, E. Unger, M. A. Unland Elorrieta, M. Usner, J. Vandenbroucke, Ward Van Driessche, D. van Eijk, N. van Eijndhoven, Sander Vanheule, J. van Santen, Matthias Vraeghe, C. Walck, A. Wallace, M. Wallraff, N. Wandkowsky, T. B. Watson, C. Weaver, A. Weindl, M. J. Weiss, J. Weldert, C. Wendt, J. Werthebach, B. J. Whelan, N. Whitehorn, K. Wiebe, C. H. Wiebusch, L. Wille, D. R. Williams, L. Wills, M. Wolf, J. Wood, T. R. Wood, K. Woschnagg, G. Wrede, D. L. Xu, X. W. Xu, Y. Xu, J. P. Yanez, G. Yodh, S. Yoshida, T. Yuan, and M. Zoecklein. 2019. “Search for Sources of Astrophysical Neutrinos Using Seven Years of IceCube Cascade Events.” ASTROPHYSICAL JOURNAL 886 (1). doi:10.3847/1538-4357/ab4ae2.
Vancouver
1.
Aartsen MG, Ackermann M, Adams J, Aguilar JA, Ahlers M, Ahrens M, et al. Search for sources of astrophysical neutrinos using seven years of IceCube cascade events. ASTROPHYSICAL JOURNAL. 2019;886(1).
IEEE
[1]
M. G. Aartsen et al., “Search for sources of astrophysical neutrinos using seven years of IceCube cascade events,” ASTROPHYSICAL JOURNAL, vol. 886, no. 1, 2019.
@article{8668163,
  abstract     = {Low-background searches for astrophysical neutrino sources anywhere in the sky can be performed using cascade events induced by neutrinos of all flavors interacting in IceCube with energies as low as similar to 1 TeV. Previously we showed that, even with just two years of data, the resulting sensitivity to sources in the southern sky is competitive with IceCube and ANTARES analyses using muon tracks induced by charge current muon neutrino interactions-especially if the neutrino emission follows a soft energy spectrum or originates from an extended angular region. Here, we extend that work by adding five more years of data, significantly improving the cascade angular resolution, and including tests for point-like or diffuse Galactic emission to which this data set is particularly well suited. For many of the signal candidates considered, this analysis is the most sensitive of any experiment to date. No significant clustering was observed, and thus many of the resulting constraints are the most stringent to date. In this paper we will describe the improvements introduced in this analysis and discuss our results in the context of other recent work in neutrino astronomy.},
  articleno    = {12},
  author       = {Aartsen, M. G. and Ackermann, M. and Adams, J. and Aguilar, J. A. and Ahlers, M. and Ahrens, M. and Alispach, C. and Andeen, K. and Anderson, T. and Ansseau, I. and Anton, G. and Arguelles, C. and Auffenberg, J. and Axani, S. and Backes, P. and Bagherpour, H. and Bai, X. and Balagopal, A. and Barbano, A. and Barwick, S. W. and Bastian, B. and Baum, V. and Baur, S. and Bay, R. and Beatty, J. J. and Becker, K.-H. and Becker Tjus, J. and BenZvi, S. and Berley, D. and Bernardini, E. and Besson, D. Z. and Binder, G. and Bindig, D. and Blaufuss, E. and Blot, S. and Bohm, C. and Boerner, M. and Boeser, S. and Botner, O. and Boettcher, J. and Bourbeau, E. and Bourbeau, J. and Bradascio, F. and Braun, J. and Bron, S. and Brostean-Kaiser, J. and Burgman, A. and Buscher, J. and Busse, R. S. and Carver, T. and Chen, C. and Cheung, E. and Chirkin, D. and Clark, K. and Classen, L. and Coleman, A. and Collin, G. H. and Conrad, J. M. and Coppin, P. and Correa, P. and Cowen, D. F. and Cross, R. and Dave, P. and de Andre, J. P. A. M. and De Clercq, C. and DeLaunay, J. J. and Dembinski, H. and Deoskar, K. and De Ridder, Sam and Desiati, P. and de Vries, K. D. and de Wasseige, G. and de With, M. and DeYoung, T. and Diaz, A. and Diaz-Velez, J. C. and Dujmovic, H. and Dunkman, M. and Dvorak, E. and Eberhardt, B. and Ehrhardt, T. and Eller, P. and Engel, R. and Evenson, P. A. and Fahey, S. and Fazely, A. R. and Felde, J. and Filimonov, K. and Finley, C. and Franckowiak, A. and Friedman, E. and Fritz, A. and Gaisser, T. K. and Gallagher, J. and Ganster, E. and Garrappa, S. and Gerhardt, L. and Ghorbani, K. and Glauch, T. and Gluesenkamp, T. and Goldschmidt, A. and Gonzalez, J. G. and Grant, D. and Griffith, Z. and Guender, M. and Guenduez, M. and Haack, C. and Hallgren, A. and Halve, L. and Halzen, F. and Hanson, K. and Haungs, A. and Hebecker, D. and Heereman, D. and Heix, P. and Helbing, K. and Hellauer, R. and Henningsen, F. and Hickford, S. and Hignight, J. and Hill, G. C. and Hoffman, K. D. and Hoffmann, R. and Hoinka, T. and Hokanson-Fasig, B. and Hoshina, K. and Huang, F. and Huber, M. and Huber, T. and Hultqvist, K. and Huennefeld, M. and Hussain, R. and In, S. and Iovine, N. and Ishihara, A. and Japaridze, G. S. and Jeong, M. and Jero, K. and Jones, B. J. P. and Jonske, F. and Joppe, R. and Kang, D. and Kang, W. and Kappes, A. and Kappesser, D. and Karg, T. and Karl, M. and Karle, A. and Katz, U. and Kauer, M. and Kelley, J. L. and Kheirandish, A. and Kim, J. and Kintscher, T. and Kiryluk, J. and Kittler, T. and Klein, S. R. and Koirala, R. and Kolanoski, H. and Koepke, L. and Kopper, C. and Kopper, S. and Koskinen, D. J. and Kowalski, M. and Krings, K. and Krueckl, G. and Kulacz, N. and Kurahashi, N. and Kyriacou, A. and Labare, Mathieu and Lanfranchi, J. L. and Larson, M. J. and Lauber, F. and Lazar, J. P. and Leonard, K. and Leszczynska, A. and Leuermann, M. and Liu, Q. R. and Lohfink, E. and Mariscal, C. J. Lozano and Lu, L. and Lucarelli, F. and Luenemann, J. and Luszczak, W. and Lyu, Y. and Ma, W. Y. and Madsen, J. and Maggi, G. and Mahn, K. B. M. and Makino, Y. and Mallik, P. and Mallot, K. and Mancina, S. and Maris, I. C. and Maruyama, R. and Mase, K. and Maunu, R. and McNally, F. and Meagher, K. and Medici, M. and Medina, A. and Meier, M. and Meighen-Berger, S. and Menne, T. and Merino, G. and Meures, T. and Micallef, J. and Momente, G. and Montaruli, T. and Moore, R. W. and Morse, R. and Moulai, M. and Muth, P. and Nagai, R. and Naumann, U. and Neer, G. and Niederhausen, H. and Nowicki, S. C. and Nygren, D. R. and Pollmann, A. Obertacke and Oehler, M. and Olivas, A. and O'Murchadha, A. and O'Sullivan, E. and Palczewski, T. and Pandya, H. and Pankova, D., V. and Park, N. and Peiffer, P. and de los Heros, C. Perez and Philippen, S. and Pieloth, D. and Pinat, E. and Pizzuto, A. and Plum, M. and Porcelli, Alessio and Price, P. B. and Przybylski, G. T. and Raab, C. and Raissi, A. and Rameez, M. and Rauch, L. and Rawlins, K. and Rea, I. C. and Reimann, R. and Relethford, B. and Renschler, M. and Renzi, G. and Resconi, E. and Rhode, W. and Richman, M. and Robertson, S. and Rongen, M. and Rott, C. and Ruhe, T. and Ryckbosch, Dirk and Rysewyk, D. and Safa, I. and Herrera, S. E. Sanchez and Sandrock, A. and Sandroos, J. and Santander, M. and Sarkar, S. and Satalecka, K. and Schaufel, M. and Schieler, H. and Schlunder, P. and Schmidt, T. and Schneider, A. and Schneider, J. and Schroeder, F. G. and Schumacher, L. and Sclafani, S. and Seckel, D. and Seunarine, S. and Shefali, S. and Silva, M. and Snihur, R. and Soedingrekso, J. and Soldin, D. and Song, M. and Spiczak, G. M. and Spiering, C. and Stachurska, J. and Stamatikos, M. and Stanev, T. and Stein, R. and Steinmueller, P. and Stettner, J. and Steuer, A. and Stezelberger, T. and Stokstad, R. G. and Stoessl, A. and Strotjohann, N. L. and Stuerwald, T. and Stuttard, T. and Sullivan, G. W. and Taboada, I. and Tenholt, F. and Ter-Antonyan, S. and Terliuk, A. and Tilav, S. and Tomankova, L. and Tonnis, C. and Toscano, S. and Tosi, D. and Trettin, A. and Tselengidou, M. and Tung, C. F. and Turcati, A. and Turcotte, R. and Turley, C. F. and Ty, B. and Unger, E. and Elorrieta, M. A. Unland and Usner, M. and Vandenbroucke, J. and Van Driessche, Ward and van Eijk, D. and van Eijndhoven, N. and Vanheule, Sander and van Santen, J. and Vraeghe, Matthias and Walck, C. and Wallace, A. and Wallraff, M. and Wandkowsky, N. and Watson, T. B. and Weaver, C. and Weindl, A. and Weiss, M. J. and Weldert, J. and Wendt, C. and Werthebach, J. and Whelan, B. J. and Whitehorn, N. and Wiebe, K. and Wiebusch, C. H. and Wille, L. and Williams, D. R. and Wills, L. and Wolf, M. and Wood, J. and Wood, T. R. and Woschnagg, K. and Wrede, G. and Xu, D. L. and Xu, X. W. and Xu, Y. and Yanez, J. P. and Yodh, G. and Yoshida, S. and Yuan, T. and Zoecklein, M.},
  issn         = {0004-637X},
  journal      = {ASTROPHYSICAL JOURNAL},
  keywords     = {IceCube},
  language     = {eng},
  number       = {1},
  pages        = {13},
  title        = {Search for sources of astrophysical neutrinos using seven years of IceCube cascade events},
  url          = {http://dx.doi.org/10.3847/1538-4357/ab4ae2},
  volume       = {886},
  year         = {2019},
}

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