    function distribute(address _gauge) public lock {
        require(isAlive[_gauge]); // killed gauges cannot distribute
        uint dayCalc = block.timestamp % (7 days);
        require((dayCalc < BRIBE_LAG) || (dayCalc > (DURATION + BRIBE_LAG)), "cannot claim during votes period");
        IMinter(minter).update_period();
        _updateFor(_gauge);
        uint _claimable = claimable[_gauge];
        if (_claimable > IGauge(_gauge).left(base) && _claimable / DURATION > 0) {
            claimable[_gauge] = 0;
            IGauge(_gauge).notifyRewardAmount(base, _claimable);
            emit DistributeReward(msg.sender, _gauge, _claimable);
            // distribute bribes & fees too
            IGauge(_gauge).deliverBribes();
        }
    }
