Filter one Post Format via a Custom Loop.

gistfile1.aw

<?php

$args = array(
	'post_type'	=> 'post',
	'post_status' 	=> 'publish', 
	'order' 	=> 'DESC', 
	'tax_query' 	=> array(
		array(
		'taxonomy' => 'post_format',
		'field'    => 'slug',
		'terms'    => array( 'post-format-aside' )
        	)
    	)
);