TITLE: GCN CIRCULAR NUMBER: 2949 SUBJECT: Triangulation of Short Hard GRB050112 (large error box) DATE: 05/01/14 17:00:42 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 hard intense GRB 050112 was detected by Konus-Wind at 11:10:22.358 UT and Helicon-Coronas-F at 11:10:24.351 UT. It was also detected by INTEGRAL SPI-ACS. It consisted of two separate pulses, first of which was multipeaked and had a duration of ~0.150 s, the second contained a single peak and had a duration of ~0.080 s. The time separation between pulses was about 0.3 s. The total duration of the burst was about 0.52 s. We have triangulated it to Wind-Helicon annulus centered at RA(2000) = 297.993 deg, Decl(2000) = -16.680 deg, whose radius is 68.634 � 0.045 deg (3 sigma) and Wind-Integral annulus centered at RA(2000) = 300.904 deg, Decl(2000) = -18.663 deg, whose radius is 69.489 � 0.192 deg (3 sigma). These annuli intersect to form 2 error boxes, one of which may be eliminated by the Konus ecliptic latitude response. The resulting error box has an approximate area of ~1300 sq. arcmin. Its coordinates are: RA(2000) DEC(2000) ERROR BOX CENTER: 221.935 -42.778 ERROR BOX CORNER 1: 222.084 -40.378 ERROR BOX CORNER 2: 221.620 -46.583 ERROR BOX CORNER 3: 221.831 -45.150 ERROR BOX CORNER 4: 222.347 -38.905 As observed by Konus-Wind, the burst had a fluence ~1.0x10^-5 erg/cm2, a peak flux ~1.6x10^-4 erg/cm2 s (both in 20-5000 keV range), and a Ep ~700 keV