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GCN Circular 16802

Subject
GRB 140907A: Discovery Channel Telescope observations
Date
2014-09-09T03:26:20Z (10 years ago)
From
Antonino Cucchiara at NASA/GSFC <antonino.cucchiara@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."
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