GCN Circular 22058
Subject
GROND observations of GRB 171027A: correction
Date
2017-10-27T11:49:56Z (7 years ago)
From
Patricia Schady at MPE/Swift <pschady@mpe.mpg.de>
P. Schady (MPE) reports:
The upper limits reported in GCN #22056 were in fact calibrated against
GROND zeropoints. The 3-sigma upper limits (AB) calibrated against
PanSTARRS are in fact:
g' > 22.2
r' > 22.2
i' > 21.2
z' > 21.0
The reported magnitudes are not corrected for the expected Galactic
foreground extinction corresponding to a reddening of E_(B-V)=0.12 mag in
the direction of the burst (Schlafly & Finkbeiner 2011).