Improved IPN triangulation of GRB 240411A

Using the BepiColombo (MGNS) data we have improved the previous IPN error box (Svinkin et al., GCN 36090). The coordinates of the updated 3 sigma error box are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 248.823 (16h 35m 17s) +43.618 (+43d 37' 03") Corners: 248.867 (16h 35m 28s) +43.236 (+43d 14' 08") 248.814 (16h 35m 15s) +43.972 (+43d 58' 19") 248.777 (16h 35m 07s) +43.999 (+43d 59' 57") 248.831 (16h 35m 20s) +43.263 (+43d 15' 47") --------------------------------------------- The error box area is 65 sq. arcmin, and its maximum dimension is 46 arcmin (the minimum one is 1 arcmin). The Sun distance was 111 deg. This box may be further improved. Updated triangulation map and HEALPix FITS files are posted at http://www.ioffe.ru/LEA/GRBs/GRB240411_T06302/IPN/