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3 results on '"Gravitational Wave counterparts"'

1. Identifying gravitational wave counterparts with near-infrared image subtraction : automating the detection of GW counterparts for VISTA

Author

Rosetti, Skye Sonja

Subjects
Gravitational Wave Counterparts, Near-infrared Image, Automation, Detection, VISTA, Astronomy, thesis
Abstract

The field of gravitational wave observational astronomy has only just begun, with the first binary black hole merger detected in 2015 and the first electromagnetic counterpart associated to a GW event being found in 2017. With the recent introduction of new entries into the detector network (e.g. Virgo, KAGRA), the planned expansion of the network (e.g. LISA) and with frequent improvements being made to existing detectors, the number of GW detections is set to increase in the coming years. This will encourage additional electromagnetic follow-up, particularly in the infra-red in the search for kilonovae. This thesis is framed around the primary motivation for this work - to automate the process of investigating near-infrared follow up images obtained from the VISTA telescope. This involves both the identification of potential transient objects which might be associated with an event, and the photometric analysis of known kilonova detections. To demonstrate the effectiveness of this work, the automated pipeline is tested against data obtained within the localisation regions of GW170814, GW190814 and GW200114. A revised estimate is also produced for GW170817 photometry which is in accordance with previous studies. Overall, the IGNIS (Identifying Gravitational wave counterparts with near Infrared Image Subtraction) pipeline is proven to be almost as effective as manually searching for transient objects to depths of mAB = 20.5 - 22, with automated detection improved on longer exposures (240s+). This work estimates VISTA-associated false positive rates at 0.048-0.06 objects per tile (one object found per 16.7-20.8 deg2).

Published
2022
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2. Quantum gravity with THESEUS.

Author

Burderi, L., Sanna, A., Di Salvo, T., Riggio, A., Iaria, R., Gambino, A. F., Manca, A., Anitra, A., Mazzola, S. M., and Marino, A.

Subjects
*PLANCK'S energy, *GAMMA ray bursts, *REDSHIFT, *QUANTUM theory, *QUANTUM gravity, *LORENTZ invariance, *MONTE Carlo method, *COSMOLOGICAL distances
Abstract

In this paper we explore the possibility to search for a dispersion law for light propagation in vacuo with a sample of Gamma-Ray Bursts detected by the THESEUS satellite. Within Quantum Gravity theories, different models for space-time quantization predict relative discrepancies of the speed of photons w.r.t. the speed of light that (in a series expansion) depend on a given power of the ratio of the photon energy to the Planck energy. This ratio is as small as 10− 23 for photons in the soft γ −ray band (100 keV). The dominant effect is determined by the first significant term of this expansion. If the first order in this expansion is relevant, these theories imply a Lorentz Invariance Violation (LIV hereafter) and are generally dubbed LIV-theories. Therefore, to detect this effect, light must propagate over enormous distances and the experiment must have extraordinary sensitivity. Gamma-Ray Bursts, occurring at cosmological distances, could be used to detect this tiny signature of space-time granularity. Once the photons of a Gamma-Ray Burst are emitted at a given (cosmological) distance, they arrive on the detector with relative delays that linearly depends on the energy differences and on the distance travelled, that, given a set of cosmological parameters, is a unique function of the redshift. The strong temporal variability of the Gamma-Ray Bursts light-curves allows, with different techniques (e.g. cross-correlations), to compute these delays by comparing light-curves of Gamma-Ray Bursts for which the redshift is known, in adjacent energy bands covering a sufficiently wide energy range. In this way, LIV-theories can be effectively constrained. THESEUS offers the opportunity to collect a homogeneous set of GRBs for which the redshift is known, with a signal to background ratio sufficient to compute delays through cross correlation techniques, and covering an energy band (from few keV to few MeV) wide enough to produce significant delays. In this article we explore the possibility to constrain LIV-theories with THESEUS by means of Monte Carlo simulations. In summary, within the nominal duration of 3 years, THESEUS could constrain (or detect) Quantum Gravity Lorentz Invariance Violation effects at al level of 17 times the Planck Length (1.6 × 10− 33 cm); if the mission is extended up to 7 years, this constrain is improved down to a level of 11 times the Planck Length. [ABSTRACT FROM AUTHOR]

Published
2021
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3. GrailQuest and HERMES: hunting for gravitational wave electromagnetic counterparts and probing space-time quantum foam

Author

F. Scala, Silvia Piranomonte, Yupeng Xu, Piero Malcovati, Samuel Pliego-Caballero, Angelo Francesco Gambino, Chiara Ferruglio, Fabrizio Fiore, M. Rapisarda, Giovanni Della Casa, G. Zanotti, Andrea Vacchi, Stefano Silvestrini, Lorenzo Amati, Simone Pirrotta, Giuseppe Bertuccio, Alessandro Maselli, András Pál, M. Fiorini, Salvatore Capozziello, D. Milankovich, Mile Karlica, Irina Rashevskaya, A. Anitra, Marco Grassi, Barbara Negri, Filippo Frontera, Margherita Piccinin, Alexander Rashevsky, Daniele Ottolina, Simonetta Puccetti, N. Zampa, Claudio Labanti, A. Guzmán, Borja Lopez Fernandez, Luciano Burderi, E. Demenev, Ugo Lo Cicero, G. Dilillo, C. Guidorzi, Andrea Santangelo, P. Nogara, Giovanni La Rosa, A. Pasquale, Masanori Ohno, Marco Barbera, Roberto Bertaccin, Alessandro Riggio, Norbert Werner, Melania Del Santo, Raffaele Piazzolla, Jakub Ripa, F. Mele, Filippo Ambrosino, Massimo Della Valle, Michele Bechini, Ivan Troisi, J. Prinetto, Tian-Xiang Chen, Marco Feroci, Jiewei Cao, C. Tenzer, Lingjun Wang, M. Citossi, Giancarlo Ghirlanda, Lara Nava, Pierluigi Bellutti, David Selcan, Francesco Russo, A. Monge, Pavel Efremov, Silvia Zane, F. Ceraudo, Uros Kostic, Giuseppe Sottile, Andrea Sanna, Fabrizio Ferrandi, M. Perri, A. Gomboc, R. Iaria, G. Sciarrone, Marco Cinelli, Y. Evangelista, Giuseppe Pucacco, Na Gao, Tiziana Di Salvo, M. Gandola, Tomaz Rotovnik, Enrico Costa, Dejan Gacnik, Gábor Galgóczi, Gianluigi Zampa, Mariafelicia De Laurentis, Paolo Lunghi, Michele Fiorito, Arianna Manca, Riccardo Campana, F. Fuschino, Andrea Colagrossi, Aurora Clerici, S. Curzel, Alessandro Papitto, Fabrizio Amarilli, E. Virgilli, Gianluca Morgante, Giovanni Amelino-Camelia, Burderi, Luciano, Di Salvo, Tiziana, Riggio, Alessandro, Gambino, Angelo Francesco, Sanna, Andrea, Fiore, Fabrizio, Amarilli, Fabrizio, Amati, Lorenzo, Ambrosino, Filippo, Amelino-Camelia, Giovanni, Anitra, Alessio, Barbera, Marco, Bechini, Michele, Bellutti, Paolo, Bertaccin, Roberto, Bertuccio, Giuseppe, Campana, Riccardo, Cao, Jiewei, Capozziello, Salvatore, Ceraudo, Francesco, Chen, Tianxiang, Cinelli, Marco, Citossi, Marco, Clerici, Aurora, Colagrossi, Andrea, Costa, Enrico, Curzel, Serena, De Laurentis, Mariafelicia, Della Casa, Giovanni, Della Valle, Massimo, Demenev, Evgeny, Del Santo, Melania, Dilillo, Giuseppe, Efremov, Pavel, Evangelista, Yuri, Feroci, Marco, Ferruglio, Chiara, Ferrandi, Fabrizio, Fiorini, Mauro, Fiorito, Michele, Frontera, Filippo, Fuschino, Fabio, Gacnik, Dejan, Galgoczi, Gabor, Gao, Na, Gandola, Massimo, Ghirlanda, Giancarlo, Gamboc, Andreja, Grassi, Marco, Guidorzi, Cristiano, Guzman, Alejandro, Iaria, Rosario, Karlica, Mile, Kostic, Uro, Labanti, Claudio, La Rosa, Giovanni, Lo Cicero, Ugo, Lopez Fernandez, Borja, Lunghi, Paolo, Malcovati, Piero, Maselli, Alessandro, Manca, Arianna, Mele, Filippo, Milankovich, Dorottya, Monge, Angel, Morgante, Gianluca, Nava, Lara, Negri, Barbara, Nogara, Paolo, Ohno, Masanori, Ottolina, Daniele, Pasquale, Andrea, Pal, Andra, Perri, Matteo, Piccinin, Margherita, Piazzolla, Raffaele, Pirrotta, Simone, Pliego-Caballero, Samuel, Prinetto, Jacopo, Pucacco, Giuseppe, Puccetti, Simonetta, Rapisarda, Massimo, Rashevskaya, Irina, Rashevsky, Alexander, Ripa, Jakub, Russo, Francesco, Papitto, Alessandro, Piranomonte, Silvia, Santangelo, Andrea, Scala, Francesca, Sciarrone, Giulia, Selcan, David, Silvestrini, Stefano, Sottile, Giuseppe, Rotovnik, Tomaz, Tenzer, Christoph, Troisi, Ivan, Vacchi, Andrea, Virgilli, Enrico, Werner, Norbert, Wang, Lingjun, Xu, Yupeng, Zampa, Gianluigi, Zampa, Nicola, Zane, Silvia, Zanotti, Giovanni, ITA, GBR, DEU, ESP, CZE, CHN, SVN, HUN, den Herder J-WA, Nikzad, S, Nakazawa, K, Burderi L., Di Salvo T., Sanna A., Fiore F., Riggio A., Gambino A.F., Amarilli F., Amati L., Ambrosino F., Amelino-Camelia G., Anitra A., Barbera M., Bechini M., Bellutti P., Bertacin R., Bertuccio G., Campana R., Cao J., Capozziello S., Ceraudo F., Chen T., Cinelli M., Citossi M., Clerici A., Colagrossi A., Costa E., Curzel S., De Laurentis M., Della Casa G., Demenev E., Del Santo M., Della Valle M., Dilillo G., Efremov P., Evangelista Y., Feroci M., Feruglio C., Ferrandi F., Fiorini M., Fiorito M., Frontera F., Fuschino F., Gacnik D., Galgoczi G., Gao N., Gandola M., Ghirlanda G., Gomboc A., Grassi M., Guidorzi C., Guzman A., Iaria R., Karlica M., Kostic U., Labanti C., La Rosa G., Lo Cicero U., Lopez Fernandez B., Lunghi P., Malcovati P., Maselli A., Manca A., Mele F., Milankovich D., Monge A., Morgante G., Nava L., Negri B., Nogara P., Ohno M., Ottolina D., Pasquale A., Pal A., Perri M., Piccinin M., Piazzolla R., Pirrotta S., Pliego-Caballero S., Prinetto J., Pucacco G., Puccetti S., Rapisarda M., Rashevskaya I., Rashevski A., Ripa J., Russo F., Papitto A., Piranomonte S., Santangelo A., Scala F., Sciarrone G., Selcan D., Silvestrini S., Sottile G., Rotovnik T., Tenzer C., Troisi I., Vacchi A., Virgilli E., Werner N., Wang L., Xu Y., Zampa G., Zampa N., Zane S., and Zanotti G.

Subjects
Physics, CubeSats, Gamma-Ray Bursts, Photon, Gravitational Wave counterparts, 010308 nuclear & particles physics, Gravitational wave, Space time, Quantum gravity, Astronomy, Triangulation (social science), 01 natural sciences, Settore FIS/05 - Astronomia E Astrofisica, All-sky monitor, Observatory, X-rays, 0103 physical sciences, Nano-satellites, Temporal triangulation, Gamma-ray burst, Quantum foam, 010303 astronomy & astrophysics
Abstract

GrailQuest (Gamma-ray Astronomy International Laboratory for Quantum Exploration of Space-Time) is an ambitious astrophysical mission concept that uses a fleet of small satellites whose main objective is to search for a dispersion law for light propagation in vacuo. Within Quantum Gravity theories, different models for space-time quantization predict relative discrepancies of the speed of photons w.r.t. the speed of light that depend on the ratio of the photon energy to the Planck energy. This ratio is as small as 10-23 for photons in the γ- ray band (100 keV). Therefore, to detect this effect, light must propagate over enormous distances and the experiment must have extraordinary sensitivity. Gamma-Ray Bursts, occurring at cosmological distances, could be used to detect this tiny signature of space-time granularity. This can be obtained by coherently combine a huge number of small instruments distributed in space to act as a single detector of unprecedented effective area. This is the first example of high-energy distributed astronomy: a new concept of modular observatory of huge overall collecting area consisting in a fleet of small satellites in low orbits, with sub-microsecond time resolution and wide energy band (keV-MeV). The enormous number of collected photons will allow to effectively search these energy dependent delays. Moreover, GrailQuest will allow to perform temporal triangulation of impulsive events with arc-second positional accuracies: an extraordinary sensitive X-ray/Gamma all-sky monitor crucial for hunting the elusive electromagnetic counterparts of Gravitational Waves, that will play a paramount role in the future of Multi-messenger Astronomy. A pathfinder of GrailQuest is already under development through the HERMES (High Energy Rapid Modular Ensemble of Satellites) project: a fleet of six 3U cube-sats to be launched by the end of 2022.

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