How do i query splunk for latest and earliest time based on epoch time rather than human readable time?

[tikoonikhil]

I have a field called as "impact_time" which has human readable dates in it. Now i want to query splunk for a range of impact_time. The only problem is that the earliest and latest time that i have is in epoch format. How do i make splunk query based on the epoch time range that i am passing?

[inventsekar]

you can use epoch times for earliest and latest

index=bar sourcetype=foo earliest=1350538170 latest=1350538870 | more search commands