TITLE: GCN CIRCULAR NUMBER: 10025 SUBJECT: GRB 090815: a faint long GRB localized by INTEGRAL DATE: 09/10/16 13:22:55 GMT FROM: Carlo Ferrigno at IAAT/ISDC C. Ferrigno (ISDC, Versoix/IAAT, Tuebingen), D.Gotz (CEA-Saclay), S.Mereghetti, A.Paizis (IASF-Milano), E. Bozzo, M. Beck (ISDC, Versoix), and J.Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report: A faint long GRB with duration of about 100 s has been detected by IBAS in IBIS/ISGRI data at 23:00:17 UTC on August 15th. No automatic alert has been issued because the trigger was at low significance. Interactive off-line analysis has allowed to confirm the GRB nature of the trigger. The refined coordinates (J2000) are: RA: 306.13 [degrees] DEC: -6.17 [degrees] with an uncertainty of 3 arcmin (90% c.l.). The soft spectrum of the GRB (only detected in the 20-40 keV energy range) and the long, slowly rising light curve may indicate a highly redshifted burst. Follow-up observations at other wavelengths are encouraged. The light curve of the GRB will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html This message can be cited. -- \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ Carlo Ferrigno Institut für Astronomie und Astrophysik Tübingen (IAAT) and ISDC Data Centre for Astrophysics Chemin d'Écogia 16 CH-1290 Versoix Switzerland Office +41.22.3792178 mobile (IT) +39.333.3599421 mobile (CH) +41.78.9210855 E-mail: Carlo.Ferrigno@unige.ch Home Page: http://www.ifc.inaf.it/~ferrigno/ ///////////////////////////////////////////////