| Title: |
ASAS-SN follow-up of IceCube high-energy neutrino alerts |
| Authors: |
Necker, Jannis David; de Jaeger, Thomas; Neumann, Kyle; Jayasinghe, Tharindu; Holoien, T. W.-S.; Thompson, Todd A.; Holmbo, Simon; ASAS-SN Collaboration; Stein, Robert; Franckowiak, Anna; Shappee, Benjamin J.; Kowalski, Marek; Kochanek, Christopher S.; Stanek, Krzysztof Z.; Beacom, John F.; Desai, Dhvanil D. |
| Publication Year: |
2022 |
| Collection: |
DESY Publication Database (PUBDB) |
| Subject Terms: |
info:eu-repo/classification/ddc/520 |
| Subject Geographic: |
DE |
| Description: |
We report on the search for optical counterparts to IceCube neutrino alerts released between April 2016 and August 2021 with the All-Sky Automated Survey for SuperNovae (ASAS-SN). Despite the discovery of a diffuse astrophysical high-energy neutrino flux in 2013, the source of those neutrinos remains largely unknown. Since 2016, IceCube has published likely-astrophysical neutrinos as public realtime alerts. Through a combination of normal survey and triggered target-of-opportunity observations, ASAS-SN obtained images within 1 hour of the neutrino detection for 20% (11) of all observable IceCube alerts and within one day for another 57% (32). For all observable alerts, we obtained images within at least two weeks from the neutrino alert. ASAS-SN provides the only optical follow-up for about 17% of IceCube's neutrino alerts. We recover the two previously claimed counterparts to neutrino alerts, the flaring-blazar TXS 0506+056 and the tidal disruption event AT2019dsg. We investigate the light curves of previously-detected transients in the alert footprints, but do not identify any further candidate neutrino sources. We also analysed the optical light curves of Fermi 4FGL sources coincident with high-energy neutrino alerts, but do not identify any contemporaneous flaring activity. Finally, we derive constraints on the luminosity functions of neutrino sources for a range of assumed evolution models. |
| Document Type: |
report |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/arxiv/arXiv:2204.00500 |
| Availability: |
https://bib-pubdb1.desy.de/record/481507; https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2022-04410%22 |
| Rights: |
info:eu-repo/semantics/closedAccess |
| Accession Number: |
edsbas.BA0A0A05 |
| Database: |
BASE |