SIMBAD references

High energy emission has been discovered serendipitously by the BeppoSAX/PDS telescope in the ∼1.3° field of view around the Piccinotti source H0917-074. A re-pointing of BeppoSAX/NFI has allowed the association of this emission with the Seyfert 2 galaxy MCG-1-24-12 which lies within the original HEAO1/A2 error box of H0917-074. This is the first PDS serendipitous discovery of a Seyfert 2 galaxy and the first detection of MCG-1-24-12 in the X-ray domain. The measured 2-10keV flux of MCG-1-24-12 is ∼1x10^–11erg/cm²/s compatible with the Piccinotti HEAO-1/A2 observation. This is a factor of ∼6 greater than that observed from EXO0917.3-0722, originally suggested as the counterpart of the Piccinotti source. The 2-10keV spectrum of MCG-1-24-12 shows the presence of Fe K_α emission together with an absorption feature at ∼8.7keV. At high energies, the Seyfert 2 still dominates and the observed 20-100keV flux is ∼4x10^–11erg/cm²/s.