$ http.get Authorization Angular Error

Send the request as long as I do it without the header, once I put the header I get an error

getMark : function(){
            var tokenId = 'tok ' + sesionesControl.get('token');
            //tokenId me regresa el token registrado...

            var config = {
                headers : {
                    'Authorization': tokenId
                }
            };

            $http.get('http://sitio.com/app/user',config)
                .success(function(data){
                    console.log(data);
                })
                .error(function(data){
                    console.log(data);
                });
        }

  

XMLHttpRequest can not load link . Response to   preflight request does not pass access control check: No   'Access-Control-Allow-Origin' header is present on the requested   resource. Origin ' link ' is therefore not allowed access.   The response had HTTP status code 404.

OPTIONS /app/user HTTP/1.1
Host: sitio.com
Connection: keep-alive
Access-Control-Request-Method: GET
Origin: http://localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.84 Safari/537.36
Access-Control-Request-Headers: authorization
Accept: */*
Referer: http://localhost/Angular/
Accept-Encoding: gzip, deflate, sdch
Accept-Language: es-ES,es;q=0.8,en;q=0.6

Thanks to those who answer:)

P.D. When sending using apps (Chrome extensions) like PostMan if you recognize