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RE23/CTA-LST Papers

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2024-11-27
16:20
First TeV upper limits on the 0.1s short bursts of magnetar SGR 1935+2154 with the CTAO LST−1 /RE23/CTA-LST Collaboration
Aims. We report on the observations of the Soft Gamma Repeater (SGR) 1935+2154 performed with the Large-Sized Telescope prototype (LST−1) of the Cherenkov Telescope Array Observatory (CTAO) during periods of high-energy (HE) activity from the source. [...]
CERN-RE23-2024-007.- Geneva : CERN, 2024 SGR1935_paper_v1: PDF;

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2024-11-27
16:14
GRB 221009A: Observations with LST-1 of CTAO and implications for structured jets in long gamma-ray bursts /RE23/CTA-LST Collaboration
GRB 221009A was the brightest gamma-ray burst (GRB) observed to date. Extensive coverage of its afterglow emission across the electromagnetic spectrum was performed, providing the first strong evidence of a jet with nontrivial angular structure in a long GRB. [...]
CERN-RE23-2024-006.- Geneva : CERN, 2024 BOAT_v0: PDF;

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2024-11-07
09:59
Constraining the TeV gamma-ray emission of SN 2024bch: a possible type IIn-L from a RSG progenitor /RE23/CTA-LST collaboration
We present very-high-energy, optical photometry and spectroscopic observations of SN 2024bch. We use gamma-ray observations performed with the first CTAO Large-Sized Telescope (LST-1) and optical observations with the Liverpool Telescope (LT), combined with data from public repositories to evaluate general properties of the event and of the progenitor star. [...]
CERN-RE23-2024-005.- Geneva : CERN, 2024 SN2024bch_v1: PDF; SN2024bch_v2: PDF;

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2024-10-30
19:03
Detection of the Geminga pulsar at energies down to 20 GeV with the LST-1 of CTAO /RE23/CTA-LST collaboration
Context. Geminga is the third gamma-ray pulsar detected at a significance level above 5σ by Imaging Atmospheric Cherenkov Telescopes (IACTs) after the Crab and the Vela pulsars. [...]
CERN-RE23-2024-004.- Geneva : CERN, 2024 Fulltext: PDF; Geminga_paper_v3: PDF; Geminga_paper_v4: PDF; Version 1 of the LST Geminga paper: PDF; Version 2 of the LST Geminga paper: PDF;

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2024-06-14
16:30
Test results of the optical calibration system for the Large Sized Telescope camera /RE23/CTA-LST collaboration
In 2018 the Large Sized Telescope (LST-1) prototype, designed to be the lowest energy detector for the Cherenkov Telescope Array Observatory, was inaugurated at the Observatorio de Roque de Los Muchachos in La Palma, Canary Island and today three more are under construction, LST2–4 . The LST camera, with 1855 photomultipliers (PMTs), requires precise and regular calibration. [...]
CERN-RE23-2024-003.- Geneva : CERN, 2024 Calibox_paper_Iori_v1: PDF; Calibox_paper_iori_v2: PDF;

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2024-05-28
19:22
Comparative study of unsupervised domain adaptation techniques applied to gamma-ray astronomy with the CTAO Large Sized Telescope-1 /RE23/CTA-LST Collaboration
Deep unsupervised domain adaptation is a widespread set of methods that leverages the knowledge of a labelled source domain to train a model to perform well on a related unlabelled target domain. They fall within the scope of the multitask learning paradigm, which aims to merge multiple single-task models into a unified architecture. [...]
CERN-RE23-2024-002.- Geneva : CERN, 2024 CVIU_2024_v0: PDF;

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2024-03-08
12:11
RS Ophiuchi: the first galactic transient detected with the LST-1 /RE23/CTA-LST collaboration
Context. The recurrent nova RS Ophiuchi (RS Oph) underwent a nova explosion in August 2021. [...]
CERN-RE23-2024-001.- Geneva : CERN, 2024 RS_Oph_LST_V101: PDF; RS_Oph_LST_v20: PDF;

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2023-11-13
09:13
Measurement of the atmospheric absorption profile with isotropic background events /RE23/CTA-LST collaboration
Atmospheric Cherenkov telescopes rely on the Earth’s atmosphere as part of the detector. The presence of clouds affects obser- vations and can introduce biases if not corrected for. [...]
CERN-RE23-2023-006.- Geneva : CERN, 2023 Felix_Comments_v02: TXT; Proton_Draft_v02: PDF; Proton_clouds_v03_to_v04: PDF; Proton_clouds_v04: PDF; internal_reviewers_proton_cloud: PDF;

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2023-10-27
09:21
A detailed study of the Very-High-Energy Crab Pulsar emission with the LST-1 telescope /RE23/CTA-LST collaboration
Context. There are currently three pulsars firmly detected by Imaging Atmospheric Cherenkov Telescopes (IACTs), two of them reaching the TeV range, challenging standard models of high energy emission of pulsars. [...]
CERN-RE23-2023-005.- Geneva : CERN, 2023 CrabPulsar_paper_LST1_v3: PDF; CrabPulsar_paper_LST1_v4: PDF; CrabPulsar_paper_LST1_v5: PDF; CrabPulsar_paper_LST1_v6: PDF; CrabPulsar_paper_LST1_v6_commentsDM: PDF; CrabPulsar_paper_LST1_v7: PDF; CrabPulsar_paper_LST1_v8: PDF; CrabPulsar_paper_LST1_v8-1: PDF; CrabPulsar_paper_LST1_v9: PDF; CrabPulsar_paper_LST1_v12: PDF; CrabPulsar_paper_LST1_v13_2: PDF; Crab_Pulsar_v0: PDF; Crab_Pulsar_v1: PDF; Crab_Pulsar_v2: PDF; GC_Response_v0: PDF; V0_GC_Comments: PDF; additional_figure_1: PNG; additional_figure_2: PNG; additional_figure_3: PNG; additional_figure_4: PNG; additional_figure_5: PNG; additional_figure_6: PNG; fwhm_energy_corr: PDF;

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2023-09-26
09:16
A new method for space-time reconstruction of images of gamma-ray telescopes applied to the LST-1 of CTA / Emery, Gabriel (Universite de Geneve (CH)) /RE23/CTA-LST collaboration
Context. Imaging Atmospheric Cherenkov Telescopes (IACTs) are used to observe Very High Energy photons from the ground. [...]
CERN-RE23-2023-004.- Geneva : CERN, 2023 Fulltext: PDF; LHfit_paper_AjP_preprint2_style_v3: PDF; LHfit_paper_AjP_preprint2_style_v4: PDF; LHfit_paper_AjP_preprint2_style_v5: PDF; LHfit_paper_AjP_preprint2_style_v6: PDF; LHfit_paper_AjP_preprint2_style_v8: PDF; LST LH Fit v1: PDF; LST_LH_Fit_v2: PDF;

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