{
  "bibcode": "2022GCN.31785....1B",
  "body": "M. Bizouard (OCA/Artemis), P-A. Duverne (IJCLAB), A. Iskandar (XAO),\nD. Datashvili (AbAO), M. Blazek (FZU), D. Turpin (CEA), T. Midavaine (KNC)\nS. Antier (OCA/Artemis), I. Tosta eMelo (INFN-LNS), X. F. Wang (TSU/BJP),\nJ. Zhu (BJP), X. Song (BJP), S. Karpov (FZU), A. Kann (IAA-CSIC),\nD. Marchais (KNC), A. Popowicz (KNC), A. Oksanen (KNC), M. Serrau (KNC),\nM. Freeberg (KNC),�� A. Klotz (IRAP-OMP), R. Kneip (KNC), E. Broens (KNC),\nO. Aguerre (KNC), report�� on behalf of the GRANDMA collaboration:\n\n\nThe GRANDMA telescope network responded to the alert of GRB 220319A \n(Page et al.\nGCN 31769). The first observations started 14 min after the BAT trigger \ntime.\nNo new object was detected within the XRT enhanced error region (Goad et \nal. GCN\n31771). The observations were��affected by the nearby full Moon and in \nsome cases\nalso by Sahara dust.\n\nIn the following table we report the preliminary photometry of our \nobservations.\nUpper limits are reported at the 3-sigma limit, in the AB system.\n\nT-T0 (hr)| MJD������ | Observatory| Filter| Upp.Mag.\n____________________________________________________\n0.23 |59657.746539| KNC-HAN������ |�� Lum���������� | 18.6\n0.94 |59657.775880| KNC-HAN������ |�� Lum���������� | 18.7\n1.38 |59657.794039| KNC-TJML���� |�� Clear������ | 15.7\n2.79 |59657.852604| KNC-T-BRO�� |�� Clear������ | 18.6\n2.89 |59657.856921| KNC-K26������ |�� Lumen������ | 18.2\n4.01 |59657.903715| KNC-T-CAT�� |�� Blue�������� | 19.4\n4.01 |59657.903715| KNC-T-CAT�� |�� Green������ | 19.5\n4.01 |59657.903715| KNC-T-CAT�� |�� Red���������� | 18.2\n5.47 |59657.964502| KNC-TJMS-PS|�� Lumen������ | 20.0\n5.62 |59657.970540| ALi-50�������� |�� Clear������ | 20.1\n7.22 |59658.037350| KNC-T-AGU�� |�� Lum���������� | 18.8\n10.85|59658.188623| C11FREE������ |�� Rc������������ | 18.7\n\nMost of these observations were performed in the context of the \nKilonova-Catcher\nprogramme (KNC), a professional-amateur collaboration within the GRANDMA\nproject, and in some��cases��using non-standard filters. The KNC \nimages��have been\nprocessed using��the MUPHOTEN��pipeline (Duverne et al. 2021) and \nphotometry was\nperformed using field��stars��from the PanSTARRS catalogue��as��reference.\n\nGRANDMA is a worldwide coordinated telescope network \n(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)\nis the citizen science program of GRANDMA \n(http://kilonovacatcher.in2p3.fr/).",
  "circularId": 31785,
  "createdOn": 1648132192000,
  "email": "marieanne.bizouard@oca.eu",
  "subject": "GRB 220319A: GRANDMA observations",
  "submitter": "Marie Anne Bizouard at ARTEMIS/CNRS  <marieanne.bizouard@oca.eu>",
  "eventId": "GRB 220319A"
}