{
  "bibcode": "2014GCN.16193....1M",
  "body": "D. Malesani (DARK/NBI), T. Kruehler (ESO Santiago), A. de Ugarte Postigo \n(IAA/CSIC and DARK/NBI), H. Dahle (Univ. Oslo), E. Soto (CUA), report on \nbehalf of a larger collaboration:\n\nWe observed the optical afterglow of GRB 140430A (Siegel et al., GCN \n16190; Melandri et al., GCN 16192) with the Nordic Optical Telescope \nequipped with ALFOSC. We took a single 100-s image in the R filter \nstarting at 22:00 UT (86.5 min after the GRB). The optical afterglow is \nwell detected at coordinates (J2000):\n\nRA = 06:51:44.61\nDec = +23:01:25.1\n\nwith an uncertainty of 0.3\". Assuming R = 15.13 for the USNO star at RA \n= 06:51:41.3, Dec = +23:01:44.0, we measure for the optical afterglow a \nmagnitude R = 18.78 +- 0.02 (statistical error only).\n\nA 1800-s spectrum was acquired starting at 22:11 UT, at airmass 2.2-2.8, \ncovering the wavelength range 3200-9100 AA. From a preliminary analysis, \nno absorption or emission features are seen in the spectrum. From the \nlack of a DLA feature down to ~4000 AA, we can set a redshift limit z < 2.3.",
  "circularId": 16193,
  "createdOn": 1398901385000,
  "email": "malesani@dark-cosmology.dk",
  "subject": "GRB 140430A: NOT optical observations",
  "submitter": "Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst  <malesani@dark-cosmology.dk>",
  "eventId": "GRB 140430A"
}