Gamma ray bursts may be blueshifted bundles of the relic radiation

A hypothesis is proposed that the gamma-ray bursts (GRBs) may arise by blueshifting the emission radiation of hydrogen and helium generated during the last scattering epoch. The blueshift mechanism is provided by such a Lema^itre – Tolman (L–T) model, in which the bang-time function $t_B(r)$ is not everywhere constant. Blueshift arises on $\mathit{\text{radial}}$ rays that are emitted over regions where $\text{dril}{t}_{B}r\mathrm{\ne }0$. The paper presents an L–T model adapted for this purpose and shows how it accounts for the observed properties of the GRBs, some properties are accounted for only qualitatively.