TITLE:   GCN CIRCULAR
NUMBER:  43559
SUBJECT: IPN triangulation of GRB 260127B (short)
DATE:    26/01/29 18:13:36 GMT
FROM:    Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>

A. Ridnaia, D. Frederiks, A. Lysenko, D. Svinkin,
and T. Cline on behalf of the Konus-Wind team,

and

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

The short-duration GRB 260127B
(Fermi-GBM detection: The Fermi GBM team, GCN 43533)
was detected by Fermi (GBM trigger 791236957) and Konus-Wind
at about 72153 s UT (20:02:33).

We have triangulated it to a Konus-GBM annulus centered at
RA(2000)=104.669 deg (06h 58m 40s)  Dec(2000)=+21.845 deg (+21d 50' 41"),
whose radius is 72.490 +/- 0.104 deg (3 sigma).

The annulus combined with the Fermi-GBM final position (GCN 43533;
glg_healpix_all_bn260127835_v00) gives ~6.8 sq. deg (3 sigma) localization region.

The the optical source detected by GOTO (GOTO26aih/AT2026bnn, GCN 43538)
is outside the IPN annulus.

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB260127_T72154/IPN/