{
  "bibcode": "2021GCN.30188....1F",
  "body": "S.Y. Fu, Z.P. Zhu, D. Xu, X. Liu (NAOC) report on behalf of a larger \ncollaboration:\n\nWe checked the archives of Legacy Survey (LS), PanSTAR, and SDSS for GRB \n210610B (Page et al., GCN 30170). From the LS, the GRB optical afterglow \n(e.g., Page et al., GCN 30170) is positionally located in a bright \nnucleus, which lies in the south-eastern part of an extended source in \nthe direction of NorthWest-SouthEast.\n\nThe source has the multi-band photometric magnitudes g = 22.97, r = \n22.87, z = 22.57, and a redshift z_ph = 0.96 +/- 0.44 from LS, and also \nPSF magnitudes g = 24.32 +/- 0.5 , r = 23.09 +/- 0.12, i = 24.33 +/- \n0.47, z = 23.61 +/- 0.69 from PanSTAR. The source is marginally detected \nby SDSS, and we measure its magnitude r ~22.8. The r-band magnitudes \nfrom three surveys are basically consistent with each other, considering \ndifference of photometric methods. The LS's z_ph = 0.96 +/- 0.44 is also \nconsistent with the spectroscopic tentative redshift z=1.13 of the GRB \noptical afterglow from the NOT (Fynbo et al., GCN 30182).\n\nWe thus think the source is likely the host galaxy of the GRB.",
  "circularId": 30188,
  "createdOn": 1623383228000,
  "email": "dxu@nao.cas.cn",
  "subject": "GRB 210610B: Photometry and phot-redshift from Legacy Survey, PanSTAR, and SDSS",
  "submitter": "Dong Xu at NAOC/CAS  <dxu@nao.cas.cn>",
  "eventId": "GRB 210610B"
}