LT12D LT12P LT12D LT12P Z-34-22 Bi-Energy Prior to SN 1734 Z-34-22 Bi-Energy Prior to SN 1734 Z-34-22 IC Prior to SN 781 Z-34-22 IC Prior to SN 781 Z-34-22 IC SN 781 to Present Z-34-22 IC SN 781 to P