[vsnet-grb-info 22982] GRB 190613B: FRAM-Auger afterglow detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  25081
SUBJECT: GRB 190613B: FRAM-Auger afterglow detection
DATE:    19/07/17 11:48:38 GMT
FROM:    Martin Jelinek at Astro.Inst-AVCR,Ondrejov  <martin.jelinek at asu.cas.cz>

Martin Jelinek, Jan Strobl (ASU CAS Ondrejov, CZ),
Martin Masek, Petr Janecek, Sergey Karpov, Jakub Jurysek,
Jan Ebr, Ronan Cunniffe, Petr Travnicek and Michael Prouza
(Institute of Physics, Prague, CZ)

report:

The 30cm robotic telescope FRAM-Auger in Malargüe
(Argentina) reacted robotically to the Swift/BAT and
Fermi/GBM alert of GRB190613B (D'Ai et al., GCNC 24807;
Bissaldi et al., GCNC 24814), starting with a series of
20s unfiltered images at 10:47:33.45 UT, i.e. 31.4s
post trigger.

We detect the source reported by Marshall et al. (GCN
24817), Zheng & Filipenko (GCN 24818), Hu et al. (GCNC
24826), de Ugarte Postigo (GCNC 24825) and other teams
at a 5 x 20s combined image taken between 79s and 202s
after the initial trigger. The brightness of the object
was r'(AB) = 15.6 +- 0.2, as calibrated against APASS
Catalogue.