TITLE:   GCN CIRCULAR
NUMBER:  45726
SUBJECT: Konus-Wind detection of GRB 260921A (correction to GCN 45722)
DATE:    26/09/24 15:34:09 GMT
FROM:    Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>

Anna Ridnaia reports on behalf of the Konus-Wind Team:

The rest-frame peak energy values of GRB 260921A plotted
in the Amati and Yonetoku diagrams, mentioned in the KW GCN 45722,
were erroneously twice-corrected for the redshift z=1.3

With the correct values of rest-frame Ep, reported  in the text
of  GCN 45722, GRB 260921A  is consistent with 90% prediction bands
of the 'Amati' relation and 68% prediction bands of 'Yonetoku' relation
for the sample of >300 long KW GRBs with known redshifts
(Tsvetkova et al., 2017; Tsvetkova et al., 2021), see the corrected plot
at http://www.ioffe.ru/LEA/GRBs/GRB260921_T34147/GRB260921A_rest_frame_corr.pdf

We apologize for this mistake.