C. Stachie
A5000870118- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Geophysics and Gravity Measurements
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- High-pressure geophysics and materials
- Astronomical Observations and Instrumentation
- Atomic and Subatomic Physics Research
- Magnetic confinement fusion research
- Cold Atom Physics and Bose-Einstein Condensates
- Radio Astronomy Observations and Technology
- Seismic Waves and Analysis
- Geophysics and Sensor Technology
- Statistical and numerical algorithms
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Earthquake Detection and Analysis
- Mechanical and Optical Resonators
- Advanced Frequency and Time Standards
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Seismology and Earthquake Studies
- Adaptive optics and wavefront sensing
- Dark Matter and Cosmic Phenomena
Observatoire de la Côte d’Azur
2019-2024
Université Côte d'Azur
2019-2024
Centre National de la Recherche Scientifique
2019-2023
Groupe Artémis (France)
2022
ABSTRACT GRANDMA (Global Rapid Advanced Network Devoted to the Multi-messenger Addicts) is a network of 25 telescopes different sizes, including both photometric and spectroscopic facilities. The aims coordinate follow-up observations gravitational-wave (GW) candidate alerts, especially those with large localization uncertainties, reduce delay between initial detection optical confirmation. In this paper, we detail GRANDMA’s observational performance during LIGO/Advanced Virgo Observing Run...
We present the Global Rapid Advanced Network Devoted to Multi-messenger Addicts (GRANDMA). The network consists of 21 telescopes with both photometric and spectroscopic facilities. They are connected together thanks a dedicated infrastructure. aims at coordinating observations large sky position estimates transient events enhance their follow-up reduce delay between initial detection optical confirmation. GRANDMA program mainly focuses on gravitational-wave alerts find characterise...
We present our follow-up observations with GRANDMA of transient sources revealed by the Zwicky Transient Facility (ZTF). Over a period six months, all ZTF triggers were examined in real time dedicated science module implemented Fink broker, which will be used for data processing Vera C. Rubin Observatory. In this article, we three selection methods to identify kilonova candidates. Out more than 35 million candidates, hundred have passed criteria. Six then followed-up (by both professional...
ABSTRACT The large sky localization regions offered by the gravitational-wave interferometers require efficient follow-up of many counterpart candidates identified wide field-of-view telescopes. Given restricted telescope time, creation prioritized lists becomes mandatory. Towards this end, we use astrorapid, a multiband photometric light-curve classifier, to differentiate between kilonovae, supernovae, and other possible transients. We demonstrate our method on observations real events. In...
Searches for gravitational-wave counterparts have been going in earnest since GW170817 and the discovery of AT2017gfo. Since then, lack detection other optical connected to binary neutron star or black hole - candidates has highlighted need a better discrimination criterion support this effort. At moment, low-latency alerts contain preliminary information about properties and, hence, on whether detected might an electromagnetic counterpart. The current alert method is classifier that...
Presented is the description of a new and general method used to search for γ-ray counterparts gravitational-wave (GW) triggers. This specifically applied single GW detector Advanced LIGO data from observing runs O1 O2 were analyzed, thus each trigger comes either LIGO-Livingston or LIGO-Hanford interferometer. For trigger, Fermi Gamma-ray burst monitor searched most significant subthreshold signal counterpart selected. Then, methodology defined in order establish which GW-γ-ray pairs are...
Abstract GW170817 is the only gravitational-wave event for which a confirmed γ -ray counterpart, GRB 170817A, has been detected. Here, we present method to search another type of signal, burst precursor, associated with compact binary merger. If emitted shortly before coalescence, high-energy electromagnetic (EM) flash travels through highly dynamical and relativistic environment, created by two objects orbiting each other. Thus, EM signal arriving at an Earth observer could somewhat...
GRANDMA is an international project that coordinates telescope observations of transient sources with large localization uncertainties. Such include gravitational wave events, gamma-ray bursts and neutrino events. currently 25 telescopes (70 scientists), the aim optimizing imaging strategy to maximize probability identifying optical counterpart a source. This paper describes motivation for project, organizational structure, methodology initial results.
Abstract GW170817–GRB 170817A provided the first observation of gravitational waves from a neutron star merger with associated transient counterparts across entire electromagnetic spectrum. This discovery demonstrated long-hypothesized association between short gamma-ray bursts and mergers. More joint detections are needed to explore relation parameters inferred wave properties burst signal. We developed multimessenger analysis LIGO, Virgo, Fermi/GBM data designed for detecting weak...