TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5521 SUBJECT: GRB 060904A: pseudo-z from spectral parameters of the prompt emission DATE: 06/09/04 16:07:09 GMT FROM: Alexandre Pelangeon at LATT,OMP,Toulouse A. Pelangeon & J-L. Atteia (LATT-OMP) report: We have used the spectral parameters of GRB 060904A provided by Golenetskii et al. (GCNC 5518) to compute the spectral pseudo-redshift** of this burst detected by SWIFT-BAT (trigger #227996: Grupe et al., GCNC 5502; Krimm et al., GCN 5516). We find a pseudo-redshift pz= 1.84 ± 0.85 We thank V. Pal'shin for providing the fluence of this GRB during the main pulse (from T0 to T0+16.64 s, KONUS time). ** cf. http://www.ast.obs-mip.fr/grb/pz