The bhairavas are decended from tatpurusha mukha of lord siva and they are, kala bhairava, martanada bhairava,kshetra bhairva, satru samhara bhairava, vatuka bhaivara, swarna akarshana bhairava ruru bhairava.
Kaarteeka masa Krishna paksha ashtami and margaseersha sukla paksha is termed as bhairava ashtami. On this day we have to worship bhairava. We should not take any food in the morning and after sun set do puja to bhairava and through out the night we should either read or hear about the stories and pravachanms ofbhairava without sleeping. This will begets us one year protection from akaala mrutyu and victory over enemies.