Events for admin user login/logout in magento?

Is there any events for admin user login and logout in magento?

I found some events for customer login but not for Admin user login

<events>
         <customer_login>
           <observers>
              <scommerce_customer_login><!--User Defined Unique Name-->
                 <class>scommerce_login/observer</class>
                 <method>checkLoginStatus</method>             
              </scommerce_customer_login>
           </observers>
         </customer_login>
      </events>

For how to get the admin users login events?

This is working as expected

<events>
            <admin_session_user_login_success>
                <observers>
                    <Ss_Supportticket_model_observer>
                        <!-- The model to be instantiated -->
                        <class>Ss_Supportticket_model_observer</class>
                        <!-- The method of the class to be called -->
                        <method>saveUserLoginSession</method>
                        <!-- The type of class to instantiate -->
                        <type>singleton</type>
                    </Ss_Supportticket_model_observer>
                </observers>
            </admin_session_user_login_success>
            <!-- <controller_action_predispatch> -->
            <controller_action_predispatch_adminhtml_index_logout>
                <observers>
                    <Ss_Supportticket_model_observer>
                        <!-- The model to be instantiated -->
                        <class>Ss_Supportticket_model_observer</class>
                        <!-- The method of the class to be called -->
                        <method>saveUserLogoutSession</method>
                        <!-- The type of class to instantiate -->
                        <type>singleton</type>
                    </Ss_Supportticket_model_observer>
                </observers>
            </controller_action_predispatch_adminhtml_index_logout>
            <!-- </controller_action_predispatch> -->
        </events>