<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def pixel_coord(self):
 """ Return the coordinates of the source in the cutout reference frame. @return: """

        return self.get_pixel_coordinates(self.reading.pix_coord, self.reading.get_ccd_num())