INTEGRAL and XMM-Newton observations of GRB 040223

We present gamma-ray and X-ray analysis of GRB040223 observed by INTEGRAL and XMM-Newton. GRB 040223 has a peak flux of (1.6 ± 0.1) × 10^-8 ergs cm^-2 s^-1, a fluence of (4.4 ± 0.4) × 10^-7 ergs cm^-2 and a steep photon power law index of -2.3 ± 0.2, in the energy range 20-200 keV. The steep spectrum implies that it is an X-ray rich GRB with emission up to 200 keV and E_peak keV. The luminosity-lag relationship was used to obtain a redshift z=0.10^+0.04_-0.02. The isotropic energy radiated in γ-rays and X-ray luminosity after 10 hours are both orders of magnitude less than classical GRBs.