Bulletin of the American Physical Society
APS April Meeting 2023
Volume 68, Number 6
Minneapolis, Minnesota (Apr 15-18)
Virtual (Apr 24-26); Time Zone: Central Time
Session D13: Neutrino Astronomy I |
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Sponsoring Units: DAP Chair: Stephanie Wissel, Pennsylvania State University Room: Marquette IV - 2nd Floor |
Saturday, April 15, 2023 3:45PM - 3:57PM |
D13.00001: The First Catalog of IceCube Neutrino Alerts Mehr U Nisa
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Saturday, April 15, 2023 3:57PM - 4:09PM |
D13.00002: Particle Shower Simulations for IceCube Emre B Yildizci, Lu Lu, Tianlu Yuan The events detected by the IceCube Neutrino Observatory have two main topologies: cascades and tracks. Cascades are particle showers, and historically, due to their short extension (on the order of meters) relative to the spacing between optical modules, the main focus for cascade events has been on measuring the total light yield as a proxy for energy, rather than their spatial features. However, as our understanding of the medium improves and we broaden our spectrum of event selection techniques, IceCube becomes more sensitive to various subtle features of cascades, especially with high energy events. These features include the electromagnetic or hadronic origin of the shower, its charm content, longitudinal and transverse profiles, and the muonic component. We present detailed shower simulations generated by tailored software using up-to-date hadronic interaction models and discuss the results and potential applications. |
Saturday, April 15, 2023 4:09PM - 4:21PM |
D13.00003: Searches for neutrino emission from GRB 221009A with the IceCube Neutrino Observatory Jessie Thwaites, Rachel Procter-Murphy, Bennett Brinson, Nora Valtonen-Mattila, Karlijn Kruiswijk Gamma-ray bursts are a promising source of hadronic acceleration and have been the target of many neutrino searches. However, thus far no significant detection of neutrinos from a GRB has been observed. The detection of the brightest GRB ever observed, GRB 221009A, provides a unique opportunity for investigation of GRBs as neutrino sources. GRB 221009A provides the strongest constraints ever on neutrino emission from a single GRB due to its high luminosity, low redshift, and advantageous declination for follow-up with the IceCube Neutrino Observatory. In this talk, we will discuss results of both realtime and offline neutrino searches from GRB 221009A with IceCube across a wide range of timescales and from MeV to PeV energies. |
Saturday, April 15, 2023 4:21PM - 4:33PM |
D13.00004: Measurement of the low energy (sub-100 TeV) astrophysical diffuse flux in IceCube Manuel Silva
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Saturday, April 15, 2023 4:33PM - 4:45PM |
D13.00005: A Search for Neutrinos from the Galactic Plane with IceCube Stephen J Sclafani IceCube has discovered a flux of astrophysical neutrinos and presented evidence for the first neutrino sources, a flaring blazar known as TXS 0506+056 and the active galaxy NGC 1068. However, the sources responsible for the majority of the astrophysical neutrino flux remain elusive. Within our Galaxy, high energy neutrinos can be produced when cosmic rays interact at their acceleration sites and during propagation through the interstellar medium. The Galactic plane has therefore long been hypothesized as a neutrino source. |
Saturday, April 15, 2023 4:45PM - 4:57PM |
D13.00006: TXS 0506+056 with Updated IceCube Data William Luszczak Past results from the IceCube Collaboration have suggested that the blazar TXS 0506+056 is a potential source of astrophysical neutrinos. However, in the years since there have been numerous updates to event processing and reconstruction, as well as improvements to the statistical methods used to search for astrophysical neutrino sources. These improvements in combination with additional years of data have resulted in the identification of NGC 1068 as a second neutrino source candidate. This talk will re-examine neutrino emission from TXS 0506+056 using many of the techniques that were developed as part of the analysis of NGC 1068. Using these improved techniques, we calculate a new significance and flux fit for the 2014 TXS 0506+056 "untriggered" neutrino flare candidate that was originally identified in the 2017 IceCube analysis. |
Saturday, April 15, 2023 4:57PM - 5:09PM |
D13.00007: Enhanced Starting Track Realtime Stream for IceCube Jesse Osborn IceCube Realtime Alerts allow for a quick follow-up to likely astrophysical neutrino events by searching for multi-messenger counterparts. The Enhanced Starting Track Realtime Stream (ESTReS) is a realtime extension of the Enhanced Starting Track Event Selection (ESTES), a high astrophysical purity muon-neutrino sample recently used by IceCube to measure the astrophysical diffuse flux. A set of computationally cheap cuts allows us to run a fast filter in seconds. This online filter passes about 100 events per day which are sent to Madison, WI via satellite where the full ESTES event selection is applied within minutes. Events that pass the final set of cuts (ESTReS + ESTES) will be sent out as realtime alerts to the broader astrophysical community. ESTReS's unique contribution to the current realtime alerts will be events in the southern sky in the 5 TeV - 100 TeV range. We expect 4 events per year. In this talk I will report the status of the ESTReS alert stream in the context of IceCube realtime program. |
Saturday, April 15, 2023 5:09PM - 5:21PM |
D13.00008: IceCube-Gen2, the Window to the Extreme Universe Lu Lu The IceCube Neutrino Observatory, located at the South Pole, has been in full operation with over 99.5% uptime for over a decade and has made breakthrough discoveries in neutrino astrophysics. It has detected the first steady and transient extragalactic neutrino sources. However, the origins of the majority of the diffuse flux are still to be resolved. IceCube-Gen2 has been proposed to expand the optical volume of IceCube by at least a factor of 8, which would significantly improve the discovery potential of source classes due to the larger effective volume and better angular resolution. In this talk, we will report on the science cases for IceCube-Gen2 and provide updates on the project. |
Saturday, April 15, 2023 5:21PM - 5:33PM |
D13.00009: Design of Optical Module Candidates for IceCube-Gen2 Yuya Makino IceCube-Gen2 is a high energy extension of IceCube, the world's largest neutrino telescope at the South Pole, that expands the high energy neutrino sensitivity by an order of magnitude for the next decades of neutrino astronomy. The IceCube-Gen2 optical array has a planned fiducial volume of 7.9 km^3, 8 times larger than that of IceCube, and will deploy 9,600 modules in 120 new strings with 240 m spacing. Two newly developed optical module types increase IceCube's current sensitivity per module by a factor of three by integrating 16 and 18 newly developed four-inch PMTs, respectively, in specially designed 12.5-inch diameter pressure vessels. In this talk, we will introduce the unique design of the new optical module, and review the current status of development and the details of the expected performance. |
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