TITLE: GCN CIRCULAR NUMBER: 29511 SUBJECT: IPN triangulation of GRB 210212B (consistent with ZTF21aakruew/AT2021cwd) DATE: 21/02/15 18:35:45 GMT FROM: Dmitry Svinkin at Ioffe Institute D. Svinkin, S. Golenetskii, D. Frederiks, A. Ridnaia, A. Lysenko, and T. Cline on behalf of the Konus-Wind team, K. Hurley, on behalf of the IPN, A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, and S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu on behalf of the Swift-BAT team, report: The long-duration GRB 210212B has been detected by Konus-Wind, in the waiting mode, INTEGRAL (SPI-ACS), and Swift (BAT), so far, at about 9477 s UT (02:37:57). The burst was likely outside the coded field of view of the BAT. We have triangulated it to a preliminary, error box whose coordinates are: --------------------------------- RA(2000), deg Dec(2000), deg --------------------------------- Corners: 159.26 +24.95 100.54 +38.07 96.30 +19.08 163.83 +2.39 --------------------------------- This box may be improved. The optical transient ZTF21aakruew/AT2021cwd (Yao et al., GCN Circ. 29508) is inside the box, lending support to the association of the transient and the burst. A triangulation map is posted at http://www.ioffe.ru/LEA/GRBs/GRB210212_T09477/IPN/ The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.