D. Xu (DARK/NBI), T. Kruehler (ESO), N. Tanvir (U. Leicester), F.
Taddia, C. Fremling (Stockholm U.) report on behalf of a larger
We observed the optical afterglow of GRB 140419A (Marshall et al., GCN
16118; Zheng et al., GCN 16119; Kuin et al., GCN 16123) using the 2.5
Nordic Optical Telescope equipped with ALFOSC. We obtained 4x300s,
3x300s, 4x200s frames in the SDSS g-, r-, and i-filters, respectively,
with floating clouds, starting at 23:10 UT on 2014-04-20 .
Photometry is calibrated with nearby SDSS stars, and results are as follows:
Tmid-T0(hr) Mag MagErr
43.54 23.16 0.15
Compared with previous measurements (e.g., from RATIR and KAIT), the
afterglow may be decaying more quickly.