GCN Circular 36829

D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko,
on behalf of the IPN,

A. Goldstein, M. S. Briggs, C. Wilson-Hodge,
and E. Burns on behalf of the Fermi GBM team,

E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,

S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu
on behalf of the Swift-BAT team, report:

The short-duration GRB 240628B
was detected by Fermi (GBM trigger 741296200), Swift (BAT),
and INTEGRAL (SPI-ACS) at about 70596 s UT (19:36:36).
The burst was outside the coded field of view of the BAT.

We have triangulated it to the following annuli:
---------------------------------------------------
annulus          R.A.     Dec.     R     dR (3sigma)
                (deg)    (deg)   (deg)     (deg)
---------------------------------------------------
GBM-SPI-ACS     30.342 -81.135  79.219   1.517
GBM-BAT        268.041  11.906  43.493  43.493
---------------------------------------------------
The annuli intersect to form a long arc which was partially Earth occulted for Fermi.

The area of the preliminary 3-sigma IPN localization
is 224.5 sq. deg, and its maximum dimension is 70.7 deg
(the minimum one is 3 deg).

This localization may be improved.

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB240628_T70595/IPN/
The HEALPix triangulation map is the multi-order HEALPix in units of probability density.