[vsnet-grb-info 4708] GRB070520B: NIR observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  6455
SUBJECT: GRB070520B: NIR observations
DATE:    07/05/22 20:18:56 GMT
FROM:    Paul Price at IfA,UH  <price at ifa.hawaii.edu>

T. Minezaki (IoA, Tokyo) and P.A. Price (IfA, Hawaii) report on behalf
of a larger collaboration:

We observed the position of GRB 070520B with the MAGNUM telescope + MIPS
dual-beam imager in R and J bands, at a mean observation time of 12.69
hours after the BAT trigger (GCN #6425).  We have only inspected the
J-band images, since other reports have covered the optical (GCN
##6442,6447).  We find no afterglow within the XRT error circle to a
limit of J = 20.1 mag.

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