TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2835 SUBJECT: Triangulation of short GRB 041116 (large error box) DATE: 04/11/17 16:58:37 GMT FROM: Dmitry Frederiks at Ioffe Institute S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks on behalf of Konus-Wind and Helicon/Coronas-F teams, T. Cline on behalf of the Konus-Wind team, and A. Rau, A. von Kienlin, G. Lichti on behalf of the INTEGRAL SPI-ACS GRB team report: A short GRB 041116 was detected by Konus-Wind at 14:42:41.383 UT and Helicon-Coronas-F at 14:42:41.245 UT. It was also detected by INTEGRAL SPI-ACS. It had a duration ~0.5 s as observed by Konus-Wind and Helicon-Coronas-F. A weak precusor is seen in the Integral SPI-ACS light curve ~0.5s before main peak, which was missed by Helicon and Konus. The total duration of the burst including precursor is about 1.2 s. We have triangulated it to Wind-Helicon annulus centered at RA(2000) = 74.438 deg, Decl(2000) = 23.927 deg, whose radius is 82.326 +/- 0.801 deg (3 sigma) and Helicon-Integral annulus centered at RA(2000) = 53.372 deg, Decl(2000) = -27.483 deg, whose radius is 87.01 +/- 5.32 deg (3 sigma). These annuli intersect to form 2 error boxes, one of which may be eliminated by the Konus ecliptic latitude response and Helicon occultation by Eearth. The resulting error box has an approximate area of 14 sq. deg. Its coordinates are: RA(2000) DEC(2000) ERROR BOX CENTER: 341.482 25.719 ERROR BOX CORNER 1: 344.755 20.592 ERROR BOX CORNER 2: 339.175 32.526 ERROR BOX CORNER 3: 337.980 30.844 ERROR BOX CORNER 4: 343.629 18.975