{
  "bibcode": "2020GCN.27779....1F",
  "body": "W. Fong, K. Paterson (Northwestern) and E. Berger (Harvard) report:\n\n\"We searched the location of the short GRB 200522A (GCN 27778; Evans et al.) in the SDSS DR12 and PS1-3Pi surveys at the XRT afterglow candidate position. The current XRT position fully encompasses a catalogued galaxy in both SDSS and PS1-3Pi, with a position of RA = 0:22:43.717, Dec = -0:16:57.52 (Alam et al. 2015, Chambers et al. 2016). This galaxy has SDSS magnitudes* of u = 22.55, g = 22.11, r = 21.17, i = 20.87, z = 20.69 mag. The SDSS photometric redshift estimate is z_phot = 0.4 +/- 0.1.\n\nAdopting r=21.17 mag and the XRT positional uncertainty, we estimate a probability of chance coincidence of ~0.01. If the association to this galaxy is correct, pending the precise position of the GRB afterglow, this would place GRB 200522A in lower 35% of the Swift short GRB redshift distribution (c.f., Fong et al. 2017, Gompertz et al. 2020).\n\nFollow-up, where possible, is highly encouraged.\"\n\n\n* Information pulled from SDSS: http://skyserver.sdss.org/DR12//en/tools/explore/summary.aspx?id=1237663783662977850",
  "circularId": 27779,
  "createdOn": 1590156354000,
  "email": "wfong@northwestern.edu",
  "subject": "GRB 200522A: Coincident catalogued galaxy at z~0.4",
  "submitter": "Wen-fai Fong at Northwestern U  <wfong@northwestern.edu>",
  "eventId": "GRB 200522A"
}