E(B-V) report for trigger 831810 using XRT Position of (276.33142,-31.90808)
Reference is GCN_Circulars-22707-Fri,_11_May_2018_15:47:15_-0400
E(B-V) = 0.258

Bandpass A_lambda
(microns) (mag)
U (0.34) 1.404
B (0.44) 1.115
V (0.54) 0.857
R (0.65) 0.691
I (0.81) 0.501

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