9 results on '"Coleiro, Alexis"'
Search Results
2. Exploiting synergies between neutrino telescopes for the next galactic core-collapse supernova.
- Author
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Bendahman, Meriem, Buellet, Anne-Cécile, Bugli, Matteo, Coelho, Joao, Coleiro, Alexis, de Wasseige, Gwenhaël, El Hedri, Sonia, Foglizzo, Thierry, Franco, Davide, Goos, Isabel, Guilet, Jérôme, Kouchner, Antoine, Tayalati, Yahya, Tonazzo, Alessandra, and Volpe, Cristina
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NEUTRINOS ,ASTROPHYSICS ,TELESCOPES ,SUPERNOVAE ,RADIATION - Abstract
Observing and characterizing the next galactic core-collapse supernova will be a critical step for neutrino experiments. Extracting information about the supernova progenitors and neutrino properties within minutes after an observation will in particular be crucial in order to optimize analysis strategies at other observatories. Moreover, certain classes of progenitors, with strong magnetic fields, could give rise to gamma-ray bursts but have been underinvestigated to date. In this contribution we propose a strategy to combine results from next-generation neutrino experiments, focusing notably on the determination of the progenitor mass and the neutrino mass ordering. Additionally, we investigate the impact of strong magnetic fields on neutrino observations, and demonstrate the detectability of the associated effects in upcoming experiments. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
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3. Collaborative experience between scientific software projects using Agile Scrum development.
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Baxter, Amanda L., BenZvi, Segev Y., Bonivento, Walter, Brazier, Adam, Clark, Michael, Coleiro, Alexis, Collom, David, Colomer‐Molla, Marta, Cousins, Bryce, Delgado Orellana, Aliwen, Dornic, Damien, Ekimtcov, Vladislav, ElSayed, Shereen, Gallo Rosso, Andrea, Godwin, Patrick, Griswold, Spencer, Habig, Alec, Hill, Remington, Horiuchi, Shunsaku, and Howell, D. Andrew
- Subjects
SCRUM (Computer software development) ,COMPUTER software development ,COMPUTER software ,SCIENTIFIC computing ,SYSTEMS software ,SOFTWARE engineering - Abstract
Developing sustainable software for the scientific community requires expertise in software engineering and domain science. This can be challenging due to the unique needs of scientific software, the insufficient resources for software engineering practices in the scientific community, and the complexity of developing for evolving scientific contexts. While open‐source software can partially address these concerns, it can introduce complicating dependencies and delay development. These issues can be reduced if scientists and software developers collaborate. We present a case study wherein scientists from the SuperNova Early Warning System collaborated with software developers from the Scalable Cyberinfrastructure for Multi‐Messenger Astrophysics project. The collaboration addressed the difficulties of open‐source software development, but presented additional risks to each team. For the scientists, there was a concern of relying on external systems and lacking control in the development process. For the developers, there was a risk in supporting a user‐group while maintaining core development. These issues were mitigated by creating a second Agile Scrum framework in parallel with the developers' ongoing Agile Scrum process. This Agile collaboration promoted communication, ensured that the scientists had an active role in development, and allowed the developers to evaluate and implement the scientists' software requirements. The collaboration provided benefits for each group: the scientists actuated their development by using an existing platform, and the developers utilized the scientists' use‐case to improve their systems. This case study suggests that scientists and software developers can avoid scientific computing issues by collaborating and that Agile Scrum methods can address emergent concerns. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
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4. Athena synergies in the multi-messenger and transient universe.
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Piro, Luigi, Ahlers, Markus, Coleiro, Alexis, Colpi, Monica, de Oña Wilhelmi, Emma, Guainazzi, Matteo, Jonker, Peter G., Namara, Paul Mc, Nichols, David A., O'Brien, Paul, Troja, Eleonora, Vink, Jacco, Aird, James, Amati, Lorenzo, Anand, Shreya, Bozzo, Enrico, Carrera, Francisco J., Fabian, Andrew C., Fryer, Christopher, and Hall, Evan
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GAMMA ray bursts ,SUPERMASSIVE black holes ,BINARY black holes ,COSMIC rays ,GRAVITATIONAL waves ,UNIVERSE ,EARLY stars - Abstract
In this paper we explore the scientific synergies between Athena and some of the key multi-messenger facilities that should be operative concurrently with Athena. These facilities include LIGO A+, Advanced Virgo+ and future detectors for ground-based observation of gravitational waves (GW), LISA for space-based observations of GW, IceCube and KM3NeT for neutrino observations, and CTA for very high energy observations. These science themes encompass pressing issues in astrophysics, cosmology and fundamental physics such as: the central engine and jet physics in compact binary mergers, accretion processes and jet physics in Super-Massive Binary Black Holes (SMBBHs) and in compact stellar binaries, the equation of state of neutron stars, cosmic accelerators and the origin of Cosmic Rays (CRs), the origin of intermediate and high-Z elements in the Universe, the Cosmic distance scale and tests of General Relativity and the Standard Model. Observational strategies for implementing the identified science topics are also discussed. A significant part of the sources targeted by multi-messenger facilities is of transient nature. We have thus also discussed the synergy of Athena with wide-field high-energy facilities, taking THESEUS as a case study for transient discovery. This discussion covers all the Athena science goals that rely on follow-up observations of high-energy transients identified by external observatories, and includes also topics that are not based on multi-messenger observations, such as the search for missing baryons or the observation of early star populations and metal enrichment at the cosmic dawn with Gamma-Ray Bursts (GRBs). [ABSTRACT FROM AUTHOR]
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- 2022
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5. SNEWPY: A Data Pipeline from Supernova Simulations to Neutrino Signals.
- Author
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Baxter, Amanda L., BenZvi, Segev, Jaimes, Joahan Castaneda, Coleiro, Alexis, Molla, Marta Colomer, Dornic, Damien, Goldhagen, Tomer, Graf, Anne, Griswold, Spencer, Habig, Alec, Hill, Remington, Horiuchi, Shunsaku, Kneller, James P., Lang, Rafael F., Lincetto, Massimiliano, Migenda, Jost, Nakamura, Ko, O’Connor, Evan, Renshaw, Andrew, and Scholberg, Kate
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NEUTRINOS ,SUPERNOVAE ,NEUTRINO detectors ,SUPERGIANT stars ,SOLAR neutrinos ,NUCLEAR physics - Abstract
Current neutrino detectors will observe hundreds to thousands of neutrinos from Galactic supernovae, and future detectors will increase this yield by an order of magnitude or more. With such a data set comes the potential for a huge increase in our understanding of the explosions of massive stars, nuclear physics under extreme conditions, and the properties of the neutrino. However, there is currently a large gap between supernova simulations and the corresponding signals in neutrino detectors, which will make any comparison between theory and observation very difficult. SNEWPY is an open-source software package that bridges this gap. The SNEWPY code can interface with supernova simulation data to generate from the model either a time series of neutrino spectral fluences at Earth, or the total time-integrated spectral fluence. Data from several hundred simulations of core-collapse, thermonuclear, and pair-instability supernovae is included in the package. This output may then be used by an event generator such as sntools or an event rate calculator such as the SuperNova Observatories with General Long Baseline Experiment Simulator (SNOwGLoBES). Additional routines in the SNEWPY package automate the processing of the generated data through the SNOwGLoBES software and collate its output into the observable channels of each detector. In this paper we describe the contents of the package, the physics behind SNEWPY, the organization of the code, and provide examples of how to make use of its capabilities. [ABSTRACT FROM AUTHOR]
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- 2022
- Full Text
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6. Multimessenger observations of counterparts to IceCube-190331A.
- Author
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Krauß, Felicia, Calamari, Emily, Keivani, Azadeh, Coleiro, Alexis, Evans, Phil A, Fox, Derek B, Kennea, Jamie A, Mészáros, Peter, Murase, Kohta, Russell, Thomas D, Santander, Marcos, and Tohuvavohu, Aaron
- Subjects
ULTRA-high energy cosmic rays ,NEUTRINOS ,PARTICLE acceleration ,SOLAR neutrinos ,SPECTRAL energy distribution - Abstract
High-energy neutrinos are a promising tool for identifying astrophysical sources of high and ultra-high energy cosmic rays (UHECRs). Prospects of detecting neutrinos at high energies (≳TeV) from blazars have been boosted after the recent association of IceCube-170922A and TXS 0506+056. We investigate the high-energy neutrino, IceCube-190331A, a high-energy starting event (HESE) with a high likelihood of being astrophysical in origin. We initiated a Swift /XRT and UVOT tiling mosaic of the neutrino localization and followed up with ATCA radio observations, compiling a multiwavelength spectral energy distribution (SED) for the most likely source of origin. NuSTAR observations of the neutrino location and a nearby X-ray source were also performed. We find two promising counterpart in the 90 per cent confidence localization region and identify the brightest as the most likely counterpart. However, no Fermi /LAT γ-ray source and no prompt Swift /BAT source is consistent with the neutrino event. At this point, it is unclear whether any of the counterparts produced IceCube-190331A. We note that the Helix Nebula is also consistent with the position of the neutrino event and we calculate that associated particle acceleration processes cannot produce the required energies to generate a high-energy HESE neutrino. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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7. Follow-up of GW150914 and multi-messenger studies of transient astrophysical sources with the ANTARES neutrino telescope.
- Author
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Coleiro, Alexis
- Subjects
ASTROPHYSICAL radiation ,NEUTRINO detectors ,NEUTRINOS ,GRAVITATIONAL waves - Abstract
By constantly monitoring at least one complete hemisphere of the sky, neutrino telescopes are well designed to detect neutrinos emitted by transient astrophysical sources. In particular, the ANTARES telescope is currently the largest high-energy neutrino detector in the Northern Hemisphere. Searches for ANTARES neutrino candidates coincident with multi-wavelength and multi-messenger transient phenomena are performed by triggering optical, X-ray and radio observations immediately after the detection of an interesting ANTARES event and also by looking for neutrino emission spatially and temporally coincident with transient astrophysical events detected across the electromagnetic spectrum or with new messengers as gravitational-wave signals. The latest results of the multi-messenger analyses performed with ANTARES will be presented in this contribution. In particular, we will focus on the neutrino follow-up performed after the detection of the first gravitation-wave event, GW150914. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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8. Search for spatial and temporal collective effects in the ANTARES neutrino telescope data.
- Author
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Coleiro, Alexis, Gracia Ruiz, Rodrigo, and Kouchner, Antoine
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NEUTRINO detectors ,GALACTIC center ,ASTROPHYSICS ,MUONS ,STATISTICAL correlation - Abstract
We investigate potential collective effects in the spatial and temporal domains in ANTARES data sets. On the one hand, we apply a two-point correlation analysis to look for inhomogeneities in the arrival directions of the high energy muon neutrino candidates detected between 2007 and 2012. This enables us to provide constraints on models of a population of point sources too faint to be detected by a likelihood-based method. On the other hand, we perform a search for ANTARES neutrino events in temporal coincidence with IceCube High-Energy Starting Events located within 45° from the Galactic Center. This study, also based on a two-point correlation function, is sensitive to transient emission and does not a prior on either the burst timing structure or on the electromagnetic emission. Therefore, it provides an effective way to acquire information on the possible origin of the IceCube astrophysical signal from transient sources. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
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9. Demonstrator model of the warm front-end electronics for the ATHENA mission's X-IFU instrument.
- Author
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Gonzalez, Manuel, Prêle, Damien, Chen, Si, Ardellier-Desages, Florence, Givaudan, Alain, Courty, Bernard, Blin, Sylvie, Oger, Ronan, Monier, Guy, Colonges, Stephan, Pailot, Damien, Coleiro, Alexis, Varniere, Peggy, and Goldwurm, Andrea
- Published
- 2022
- Full Text
- View/download PDF
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