GRB 120815A afterglow spectra (Kruehler+, 2013)

Flux-calibrated VLT/X-shooter medium resolution spectrum of the GRB 120815A afterglow. Spectroscopic observations of the GRB 120815A afterglow in the wavelength range between 3000 and 24800Å commenced on 2012-08-15 at 03:55 UT (6.06ks after the BAT trigger) with the cross-dispersed echelle spectrograph Xshooter mounted at ESO's Very Large Telescope (VLT) UT2. They consisted of four nodded exposures in the sequence ABBA with exposure times of 600s each, taken simultaneously in X-shooter's ultraviolet/blue (UVB - 3150-5900Å), visible (VIS - 5600-10080Å) and near-infrared (NIR - 10200-24080Å) arms with R~6000, 10400, 6200 for the UVB/VIS and NIR arm, respectively. J/A+A/557/A18