{
  "bibcode": "2009GCN..8925....1G",
  "body": "S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, P.\nOleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind\nteam,\n\nK. Yamaoka, M. Ohno, Y. Fukazawa, T. Takahashi, M. Tashiro, Y. Terada,\nT. Murakami, K. Makishima, and Y. Hanabata on behalf of the Suzaku-WAM team,\n\nV. Connaughton, and M. Briggs on behalf of the Fermi GBM team,\n\nA. von Kienlin, G. Lichti, and A. Rau, and K. Hurley on behalf of the\nINTEGRAL SPI-ACS team report:\n\nKonus-Wind, INTEGRAL-SPI-ACS, and Suzaku-WAM observed the bright short\nhard GRB 090227B at about 18:31:00 UT (corresponding to the Fermi/GBM\ntrigger 257452263 / 090227772: Guiriec, GCN 8921).\n\nThe burst light curve shows a single pulse with a duration of ~0.2 sec.\n\nTriangulation gives a Konus-WAM annulus centered at RA(2000)=336.619\n(22h 26m 29s) Dec(2000)=-16.013 (-16d 00' 46\"), whose radius is 56.968\n�0.097 deg (3 sigma), and a Konus-SPI-ACS annulus centered at\nRA(2000)=337.423 (22h 29m 42s) Dec(2000)= -19.538 (-19d 32' 16\"), whose\nradius is  59.273 � 0.224 deg (3sigma). These annuli intersect at\ngrazing incidence to form two long error boxes, one of which may be\neliminated by the GBM location (Guiriec, GCN 8921).\nThe resulting error box has the coordinates:\n-----------------------------------------------------\n       RA(2000), deg              Dec(2000), deg\n-----------------------------------------------------\nCenter:\n    13.499 (00h 54m 00s)   +28.401 (+28d 24' 05\")\nCorners:\n    8.168 (00h 32m 40s)   +32.167 (+32d 10' 02\")\n   11.644 (00h 46m 34s)   +30.005 (+30d 00' 20\")\n   17.745 (01h 10m 59s)   +24.579 (+24d 34' 44\")\n   15.181 (01h 00m 43s)   +26.796 (+26d 47' 46\")\n-----------------------------------------------------\n\nThe error box area is 1.531 sq. deg.\n\nThis error box may be improved.\n\nWe have also derived a Konus-GBM annulus for the burst which is fully \nconsistent with the Konus-WAM annulus.\n\nThe GBM location is consistent with the IPN box.\nThe center of the GBM location lies 1.830 deg from the Konus-WAM annulus\nand 4.041 deg from the center of the box.\nYou can find the GBM confidence contours overplotted on the IPN box at \nthe IPN triangulation map. The contours should be considered as \npreliminary and we expect the GBM localization code will be\nrefined. No systematic error has been added.\n\nThe Konus-Wind light curve of this GRB and IPN triangulation map is\navailable at http://www.ioffe.ru/LEA/GRBs/GRB090227_T66659/",
  "circularId": 8925,
  "createdOn": 1236094118000,
  "email": "val@mail.ioffe.ru",
  "subject": "IPN localization of short bright GRB 090227B",
  "submitter": "Valentin Pal'shin at Ioffe Inst  <val@mail.ioffe.ru>",
  "eventId": "GRB 090227B"
}