{
  "bibcode": "2016GCN.19421....1S",
  "body": "S. Schmidl, D. A. Kann, U. Laux (all TLS Tautenburg), S. Schulze (PUC), S.\nKlose, and A. Nicuesa Guelbenzu (both TLS Tautenburg) report:\n\nWe observed the location of the afterglow of the bright Fermi LAT/GBM\n(Longo et al., GCN 19403, Roberts et al., GCN 19411) GRB 160509A,\nlocalized in the X-rays by Kennea (GCN 19407) and Kennea et al. (GCN\n19408), in the optical/NIR by Levan et al. (GCN 19411) and Cenko et al.\n(GCN 19416), as well as in the radio band by Alexander et al. (GCN 19414),\nwith the 1.34m Schmidt telescope of the Thueringer Landessternwarte\nTautenburg, in good conditions.\n\nWe obtained a total of 26 x 600 s images in the Rc band, starting at\n20:46:04 UT, 11.78 hrs after the GRB. The total stack has an integration\ntime of 15600 s, centered 0.583 days after the GRB.\n\nAt the afterglow position, we detect an extended source. Comparing to the\nhigher resolution DCT image (Cenko & Tanvir, priv. comm.), there is a\nnearby source which is somewhat blended with the afterglow in our image.\nTherefore, we use a small aperature to measure the afterglow magnitude. \nUsing four comparison stars in the surroundings, whose SDSS magnitudes\nwere transformed to the Rc band using the transformation equations of\nLupton (2005), we obtained a magnitude of:\n\nRc = 23.6 +/- 0.3 mag.\n\nThis is in good agreement with the detections derived by Levan et al. and\nCenko et al. after transforming their results from AB to Vega mags.\n\nThe magnitude is not corrected for the Galactic extinction along the line\nof sight of E(B-V) = 0.25 mag (Schlafly & Finkbeiner 2011).\n\nUsing the prompt emission results of Konus-Wind (Frederiks et al., GCN\n19417) and the redshift z = 1.17 (Tanvir et al., GCN 19419), we derive a\nbolometric (1 keV - 10 MeV in the source frame) isotropic energy release\nof (8.56 +/- 1.1)E53 erg, and a E_peak,rest = 625 keV. The isotropic\nenergy release is very similar to that of GRB 130427A, and we note the\nlight curve also shows similarities.\n\nPS.: We also wish to point out that this GRB occurred on the 11th\nanniversary of the first ever detected short-GRB X-ray afterglow, that of\nGRB 050509B (Gehrels et al. 2005).\n\n[GCN OPS NOTE(10may16):  Per author's request, In the last paragraph,\n\"050509A\" was corrected to \"050509B\".]",
  "circularId": 19421,
  "createdOn": 1462915969000,
  "email": "schmidl@tls-tautenburg.de",
  "subject": "GRB 160509A: TLS Tautenburg Afterglow Detection",
  "submitter": "Sebastian Schmidl at TLS Tautenburg  <schmidl@tls-tautenburg.de>",
  "eventId": "GRB 160509A"
}