Pulsating stars in NGC 6231
We identified 32 variable stars in the field of the cluster out of which 21 are confirmed members and twelve are newly detected variable stars. Ten stars were classified as Slowly Pulsating B (SPB) stars in NGC 6231 out of which seven are new discoveries. We also analyzed six previously reported beta Cephei variables in more detail. One of them may be a hybrid beta Cephei/SPB pulsator.