{
  "bibcode": "2019GCN.24684....1K",
  "body": "D. A. Kann, L. Izzo (both HETH/IAA-CSIC), A. de Ugarte Postigo \n(HETH/IAA-CSIC, DARK/NBI), M. Blazek, C. C. Thoene, K. Bensch (all \nHETH/IAA-CSIC), and V. Casanova (IAA-CSIC) report:\n\nWe observed the afterglow position (Lipunov et al., GCN 24680) of the \nextremely bright GRB 190530A (GBM detection and localization: Fermi GBM \nteam, GCN 24676, Biltzinger et al., GCN 24677; Fermi-LAT localization: \nLongo et al., GCN 24679; Agile-MCAL/GRID detections: Lucarelli et al., \nGCN 24678, Verecchia et al., GCN 24683) with the 1.5-m telescope of the \nSierra Nevada Observatory (OSN), Spain. The afterglow is well-detected.\n\nWe measure the following AB magnitude:\n\nRc = 17.63  +- 0.10 mag at 0.437314 days after the GRB.\n\nThe magnitude were derived against 1 nearby star from the SDSS catalog, \nusing the transformation equations of Lupton (2005), and transformed \nback into AB mag.\n\nWe note this is an exceedingly bright afterglow, further follow-up is \nencouraged despite the bad visibility.",
  "circularId": 24684,
  "createdOn": 1559253486000,
  "email": "kann@iaa.es",
  "subject": "GRB 190530A: Bright afterglow confirmed by OSN",
  "submitter": "Alexander Kann at IAA-CSIC  <kann@iaa.es>",
  "eventId": "GRB 190530A"
}