TITLE: GCN CIRCULAR NUMBER: 44884 SUBJECT: IPN triangulation of GRB 260601B / EP260601a DATE: 26/06/09 12:41:20 GMT FROM: Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru> D. Svinkin, D. Frederiks, A. Lysenko, A. Ridnaia, and T. Cline on behalf of the Konus-Wind team, Chen-Wei Wang (IHEP), Shao-Lin Xiong (IHEP), Shuang-Nan Zhang (IHEP) on behalf of the Insight-HXMT team, Zheng-Hang Yu, Chen-Wei Wang, Shao-Lin Xiong, Chao Zheng, Cheng-Kui Li (IHEP) on behalf of GECAM team, E. Burns on behalf of the IPN, S. Sugita, A. Yoshida, T. Sakamoto, Y. Kawakubo (AGU), K. Yamaoka (Nagoya U), S. Nakahira (JAXA), Y. Asaoka (ICRR), S. Torii, Y. Akaike, K. Kobayashi (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U), N. Cannady (GSFC), M. L. Cherry (LSU), S. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena) on behalf of the CALET collaboration, A. Arya (IITB), G. Waratkar (Caltech/IITB), V. Bhalerao (IITB) on behalf of AstroSat/CZTI team, report: The long-duration GRB 260601B (GECAM-B detection: Yu et al., GCN 44767; NuSTAR-ACS detection: Waratkar et al., GCN 44771; CALET-GBM detection: Sugita et al., GCN 44773; Insight-HXMT detection: Wang et al., GCN 44785; Glowbug detection: Cheung et al., GCN 44801; Konus-Wind detection: Ridnaia et al., GCN 44806; AstroSat-CZTI detection: Arya et al., GCN 44839) was detected by GECAM-B, NuSTAR (ACS), CALET (GBM trigger 1464376270), Insight-HXMT (HE), Glowbug, AstroSat (CZTI), and Konus-Wind, at about 69168 s UT (19:12:48). We have triangulated it to the 3 sigma IPN localization region whose area is 55 sq. deg, and its maximum dimension is 39 deg (the minimum one is 1.3 deg). The fast X-ray transient EP260601a (Yang et al., GCN 44766) is inside the IPN localization strengthen the association of the transient and GRB 260601B. A triangulation map and HEALPix FITS files are posted at http://www.ioffe.ru/LEA/GRBs/GRB260601_T69173/IPN/ The HEALPix triangulation map is the multi-order HEALPix in units of probability density. View this GCN Circular online at https://gcn.nasa.gov/circulars/44884. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...