The GRANDMA network in preparation for the fourth gravitational-wave observing run

S. Agayeva , V. Aivazyan , S. Alishov , M. Almualla , C. Andrade , S. Antier (1) , J.-M. Bai , A. Baransky , S. Basa (2) , P. Bendjoya (3) , Z. Benkhaldoun , S. Beradze , D. Berezin , U. Bhardwaj , M. Blazek , O. Burkhonov , E. Burns , S. Caudill , N. Christensen (1) , F. Colas (4) , A. Coleiro (5) , W. Corradi , M.W. Coughlin , T. Culino (1) , D. Darson (6) , D. Datashvili , G. de Wasseige , T. Dietrich , F. Dolon (7) , D. Dornic (8) , J. Dubouil (4) , J.-G. Ducoin (9) , P.-A. Duverne (10) , A. Esamdin , A. Fouad , F. Guo , V. Godunova , P. Gokuldass , N. Guessoum , E. Gurbanov , R. Hainich , E. Hasanov , P. Hello (10) , T. Hussenot-Desenonges (10) , R. Inasaridze , A. Iskandar , E.E.O. Ishida (11) , N. Ismailov , T. Jegou Du Laz (10) , D.A. Kann , G. Kapanadze , S. Karpov , R.W. Kiendrebeogo (1) , A. Klotz (12, 13) , N. Kochiashvili , A. Kaeouach , J.-P. Kneib , W. Kou , K. Kruiswijk , S. Lombardo (2) , M. Lamoureux , N. Leroy (10) , A. Le van Su (7) , J. Mao , M. Mašek , T. Midavaine (5) , A. Möller , D. Morris , R. Natsvlishvili , F. Navarete , S. Nissanke , K. Noonan , K. Noysena , N.B. Orange , J. Peloton (10) , M. Pilloix (1) , T. Pradier (14) , M. Prouza , G. Raaijmakers , Y. Rajabov , J.-P. Rivet (3) , Y. Romanyuk , L. Rousselot , F. Rünger , V. Rupchandani , T. Sadibekova (15) , N. Sasaki , A. Simon , K. Smith , O. Sokoliuk , X. Song , A. Takey , Y. Tillayev , I. Tosta E. Melo , D. Turpin (15) , A. de Ugarte Postigo (1) , M. Vardosanidze , X.F. Wang , D. Vernet (16) , Z. Vidadi , J. Zhu , Y. Zhu

1 ARTEMIS - Astrophysique Relativiste Théories Expériences Métrologie Instrumentation Signaux
2 LAM - Laboratoire d'Astrophysique de Marseille
3 LAGRANGE - Joseph Louis LAGRANGE
4 IMCCE - Institut de Mécanique Céleste et de Calcul des Ephémérides
5 APC (UMR_7164) - AstroParticule et Cosmologie
6 ENS-PSL - École normale supérieure - Paris
7 OSU PYTHEAS - Institut Pythéas
8 CPPM - Centre de Physique des Particules de Marseille
9 IAP - Institut d'Astrophysique de Paris
10 IJCLab - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
11 LPC - Laboratoire de Physique de Clermont
12 IRAP - Institut de recherche en astrophysique et planétologie
13 UT3 - Université Toulouse III - Paul Sabatier
14 IPHC - Institut Pluridisciplinaire Hubert Curien
15 AIM (UMR7158 / UMR_E_9005 / UM_112) - Astrophysique Interprétation Modélisation
16 OCA - Observatoire de la Côte d'Azur

GRANDMA is a world-wide collaboration with the primary scientific goal of studying gravitational-wave sources, discovering their electromagnetic counterparts and characterizing their emission. GRANDMA involves astronomers, astrophysicists, gravitational-wave physicists, and theorists. GRANDMA is now a truly global network of telescopes, with (so far) 30 telescopes in both hemispheres. It incorporates a citizen science programme (Kilonova-Catcher) which constitutes an opportunity to spread the interest in time-domain astronomy. The telescope network is an heterogeneous set of already-existing observing facilities that operate coordinated as a single observatory. Within the network there are wide-field imagers that can observe large areas of the sky to search for optical counterparts, narrow-field instruments that do targeted searches within a predefined list of host-galaxy candidates, and larger telescopes that are devoted to characterization and follow-up of the identified counterparts. Here we present an overview of GRANDMA after the third observing run of the LIGO/VIRGO gravitational-wave observatories in $2019-2020$ and its ongoing preparation for the forthcoming fourth observational campaign (O4). Additionally, we review the potential of GRANDMA for the discovery and follow-up of other types of astronomical transients.

Mots clés: detector: network; gravitational radiation; observatory; electromagnetic; LIGO; VIRGO; optical

Domaines: Instrumentations et Détecteurs [physics.ins-det]; Astrophysique [astro-ph]

S. Agayeva, V. Aivazyan, S. Alishov, M. Almualla, C. Andrade, et al.. The GRANDMA network in preparation for the fourth gravitational-wave observing run. SPIE Astronomical Telescopes + Instrumentation 2022, Jul 2022, Montréal, Canada. pp.121861H, ⟨10.1117/12.2630240⟩. ⟨hal-03759750⟩