{
  "bibcode": "2022GCN.32795....1R",
  "body": "Y. Rajabov, T. Sadibekova (UBAI), Y. Tillayev (UBAI, NUUz),\nC. Rinner, Z. Benkhaldoun (OUCA), X. F. Wang (THU/BJP),\nJ. Zhu (BJP), X. Y. Zeng (CGTU), L. T. Wang, A. Iskandar (XAO),\nA. M. Fouad, A. Takey A. Shokry, M. Soliman (NRIAG), P. Hello,\nT. Hussenot (IJCLAB), M. Boer, A. de Ugarte Postigo, S. Antier (OCA/Artemis)\nD. A. Kann (Goethe Univ.), E. Burns (LSU), A. Simon, A. Baransky\n(Kyiv Univ), L. Abe, Ph. Bendjoya, J.-P. Rivet (Lagrange-OCA),\nD. Vernet (Galilee-OCA), S. Brunier (KNC), R. Inasaridze, R. Natsvlishvili,\nN. Kochiashvili (AbAO), S.Beradze, V. Aivazyan, G. Kapanadze, O.Burkhonov,\nJ. G. Ducoin (IAP), S.Ehgamberdiev (UBAI, NUUz), A. Klotz (OMP/IRAP),\nI. Tosta e Melo (INFN-LNS) report on behalf of GRANDMA collaboration:\n\nThe GRANDMA telescope network responded to the alert of the ultra-bright\nGRB 221009A (Swift detection: Dichiara et al., GCN 32632; Fermi\nGBM detection: Veres et al., GCN 32636).\n\nThe first observations started 2.30 h after the Fermi/GBM trigger time\nwith TAROT-TRE without filter.\n\nBelow, we report select observations. We also report our 5-sigma upper\nlimits. Magnitudes are given in the AB system.\n\nT-T0 (day)| MJD���� | Obser.���� |Exposure| Filter | Mag +/- err |Upp.Lim. (AB)\n___________________________________________________________________________\n1.069 |59862.622720|UBAI-ST| 6x180s |R-Bessel| 18.3�� +/- 0.1 | 19.2\n1.136 |59862.689664| KAO���� | 11x100s| sdssr�� | 18.57 +/- 0.05| 20.5\n1.134 |59862.687523| KAO���� | 2x120s | sdssg�� | 20.43 +/- 0.2 | 19.8\n1.154 |59862.707801| KAO���� | 9x80s�� | sdssi�� | 17.56 +/- 0.05| 20.3\n1.166 |59862.719039| KAO���� | 2x120s | sdssz�� | 16.93 +/- 0.05| 19.7\n1.223 |59862.776151|Lisnyky| 10x30s |R-Bessel| 18.15 +/- 0.1 | 19.6\n1.258 |59862.811817| MOSS�� | 20x60s | clear�� | 18.5�� +/- 0.1 | 20.3\n1.301 |59862.854179|C2PU-O | 2x300s | sdssr�� | 18.96 +/- 0.1 | 20\n3.027 |59864.580925| SNOVA | 10x150s| clear�� |�������������� -���������� | 19.7\n3.047 |59864.600648|UBAI-ST| 5x240s |R-Bessel| 19.85�� +/- 0.1| 19.3\n4.191 |59865.743981| KAO���� | 21x110s| sdssz�� | 18.8���� +/- 0.1| 19.7\n\nThese detections and limits are consistent with the detections and limits\npreviously reported in Lipunov et al., GCN 32634; Perley, GCN 32638;\nBroens, GCN 32640; Hu et al., GCN 32644; Belkin et al., GCN 32645; GCN 32769\n; Wet et al., GCN 32646; Xu et al., GCN 32647; de Ugarte Postigo et al., GCN\n32648; Odeh, GCN 32649; GCN 32666; Brivio et al., GCN 32652; Kuin et al.,\nGCN 32656; Paek et al., GCN 32659; Kumar et al., GCN 32662; Romanov, GCN\n32664; 32679; Chen et al., GCN 32667; Vidal et al., GCN 32669; Kim et al.,\nGCN 32670; Groot et al., GCN 32678; Castro-Tirado et al., GCN 32686;\nWatson et al., GCN 32692; Strausbaugh et al. GCN 32693; Butler et al., GCN\n32705; Vinko et al., GCN 32709; Mao et al., GCN 32727; Zaznobin et al.,\nGCN 32729; Sasada et al., GCN 32730; Strausbaugh & Cucchiara, GCN 32738;\nO'Connor et al., GCN 32739; GCN 32750; Bikmaev et al., GCN 32743; GCN\n32752; Rastinejad & Fong, GCN 32749; Schneider et al., GCN 32753;\nD���Avanzo et al., GCN 32755; Huber et al., GCN 32758; Shrestha et al.,\nGCN 32759; 32771; Izzo et al., GCN 32765.\n\nThe observations were contaminated by the nearly full Moon.\n\nFurther analysis are ongoing in GRANDMA especially on\nTAROT, ShAO-T60, AbAO-T70 and C2PU-O.\n\nThe KAO, UBAI-ST have been calibrated using nearby\nstars from the Pan-STARRS catalog in sdss r, g, i and z, measured with\nSTDpipe (Karpov 2022). Lisnyky-AZT has been calibrated using field\nstars from the PanSTARRS-DR1 catalog, measured with the MUPHOTEN pipeline\n(Duverne et al. 2022). MOSS and SNOVA data have been calibrated with\nGaia DR2.\n\nWe advocate a joint multi-wavelength publication for this event and we are\nhappy to collaborate with teams that have the same spirit,\nto be able to explore the best astrophysical scenario.\n\nGRANDMA is a worldwide telescope network (grandma.ijclab.in2p3.fr)\ndevoted to the observation of transients in the context of multi-messenger\nastrophysics (Antier et al. 2020 MNRAS 497, 5518). Kilonova-Catcher (KNC) is\nthe citizen science program of GRANDMA (http://kilonovacatcher.in2p3.fr/).",
  "circularId": 32795,
  "createdOn": 1666107166000,
  "email": "sarah.antier@oca.eu",
  "subject": "GRB 221009A: GRANDMA observations",
  "submitter": "Sarah Antier at OCA  <sarah.antier@oca.eu>",
  "eventId": "GRB 221009A"
}