A Search for Time-dependent Astrophysical Neutrino Emission with IceCube Data from 2012 to 2017
Abstract High-energy neutrinos are unique messengers of the high-energy universe, tracing the processes of cosmic ray acceleration. This paper presents analyses focusing on time-dependent neutrino point-source searches. A scan of the whole sky, making no prior assumption about source candidates, is...
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| Format: | Article |
| Language: | English |
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American Astronomical Society
2022
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| Online Access: | https://hdl.handle.net/1721.1/141654 |
| _version_ | 1826196350163746816 |
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| author | Conrad, Janet |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Conrad, Janet |
| author_sort | Conrad, Janet |
| collection | MIT |
| description | Abstract
High-energy neutrinos are unique messengers of the high-energy universe, tracing the processes of cosmic ray acceleration. This paper presents analyses focusing on time-dependent neutrino point-source searches. A scan of the whole sky, making no prior assumption about source candidates, is performed, looking for a space and time clustering of high-energy neutrinos in data collected by the IceCube Neutrino Observatory between 2012 and 2017. No statistically significant evidence for a time-dependent neutrino signal is found with this search during this period, as all results are consistent with the background expectation. Within this study period, the blazar 3C 279, showed strong variability, inducing a very prominent gamma-ray flare observed in 2015 June. This event motivated a dedicated study of the blazar, which consists of searching for a time-dependent neutrino signal correlated with the gamma-ray emission. No evidence for a time-dependent signal is found. Hence, an upper limit on the neutrino fluence is derived, allowing us to constrain a hadronic emission model. |
| first_indexed | 2024-09-23T10:25:30Z |
| format | Article |
| id | mit-1721.1/141654 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:25:30Z |
| publishDate | 2022 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | mit-1721.1/1416542023-04-11T20:22:10Z A Search for Time-dependent Astrophysical Neutrino Emission with IceCube Data from 2012 to 2017 Conrad, Janet Massachusetts Institute of Technology. Department of Physics Abstract High-energy neutrinos are unique messengers of the high-energy universe, tracing the processes of cosmic ray acceleration. This paper presents analyses focusing on time-dependent neutrino point-source searches. A scan of the whole sky, making no prior assumption about source candidates, is performed, looking for a space and time clustering of high-energy neutrinos in data collected by the IceCube Neutrino Observatory between 2012 and 2017. No statistically significant evidence for a time-dependent neutrino signal is found with this search during this period, as all results are consistent with the background expectation. Within this study period, the blazar 3C 279, showed strong variability, inducing a very prominent gamma-ray flare observed in 2015 June. This event motivated a dedicated study of the blazar, which consists of searching for a time-dependent neutrino signal correlated with the gamma-ray emission. No evidence for a time-dependent signal is found. Hence, an upper limit on the neutrino fluence is derived, allowing us to constrain a hadronic emission model. 2022-04-04T17:20:33Z 2022-04-04T17:20:33Z 2021 2022-04-04T17:13:25Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/141654 Conrad, Janet. 2021. "A Search for Time-dependent Astrophysical Neutrino Emission with IceCube Data from 2012 to 2017." Astrophysical Journal, 911 (1). en 10.3847/1538-4357/ABE7E6 Astrophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Astronomical Society The American Astronomical Society |
| spellingShingle | Conrad, Janet A Search for Time-dependent Astrophysical Neutrino Emission with IceCube Data from 2012 to 2017 |
| title | A Search for Time-dependent Astrophysical Neutrino Emission with IceCube Data from 2012 to 2017 |
| title_full | A Search for Time-dependent Astrophysical Neutrino Emission with IceCube Data from 2012 to 2017 |
| title_fullStr | A Search for Time-dependent Astrophysical Neutrino Emission with IceCube Data from 2012 to 2017 |
| title_full_unstemmed | A Search for Time-dependent Astrophysical Neutrino Emission with IceCube Data from 2012 to 2017 |
| title_short | A Search for Time-dependent Astrophysical Neutrino Emission with IceCube Data from 2012 to 2017 |
| title_sort | search for time dependent astrophysical neutrino emission with icecube data from 2012 to 2017 |
| url | https://hdl.handle.net/1721.1/141654 |
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