[vsnet-grb-info 15513] GRB 140907A: Discovery Channel Telescope observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16802
SUBJECT: GRB 140907A: Discovery Channel Telescope observations
DATE:    14/09/09 03:26:20 GMT
FROM:    Antonino Cucchiara at NASA/GSFC  <antonino.cucchiara at nasa.gov>

A. Cucchiara (NASA-GSFC),S.B. Cenko (NASA-GSFC), J. Capone (UMD), 
V. Toy (UMD),   E. Troja (NASA-GSFC), A. Kutyrev (NASA-GSFC), S. Veilleux
(UMD), and S. Gezari (UMD) report on behalf of a larger collaboration:

"On September 08.37UT (approximately 16.5h after the discovery) we observed 
the optical counterpart of GRB 140907A (Krimm et al. GCN 16788, Xu et al. 
GCN 16789, Kuin et al. GCN 16791) with the Large Monolithic Imager (LMI) on 
the 4.3m  Discovery Channel Telescope (DCT) at Happy Jack, AZ. We observed in 
g', r', and i' bands for a total of 6, 6 and 4 minutes respectively.

Using a set of stars from the APASS catalogue we derived the following 
magnitude for the afterglow:

g' = 21.54 +- 0.17
r' = 20.92 +- 0.15
i' = 20.42 +- 0.16

We thank the DCT staff, in particular S. Strosahl and H. Larson for 
their support in performing these observations."