As far as we are aware, there is nothing outside of the minds of conscious entities which refers to morality - I dont think we can assert there exists an objective morality (independent of people's minds), however we can probably construct a range of various objective frameworks for the evaluation of outcomes and behaviours with their primary focus being the determination of moralistic association - it does however require that certain assumptions are used in the construction of the heuristics which inform the construction of the frameworks.
That said, I fail to see the argument where belief in the supernatural would usually provide an objective metric for morality, in most cases theistic and deistic frameworks involve the use of a subjective metric for morality (god's subjectivity). That said, there are times where some mechanism (rather than metric) is used, an unconscious force independent of influence from any consciousness (even god's cannot alter it) only THIS could be suggested to be a truly objective morality (and thus this truly objective morality could even be impartially applied to gods).
That is a bit of a mouthful so to attempt to put it more succinctly:
>> I think if we make assumptions about what constitutes morality (a subjective process), it is possible to create (mainly) objective understandings of morality.
>> The only truly objective morality would be free from the influence of any conscious entity and most examinations of morality are based on precisely the reverse.
