EID       Date      UT       Exposure  Cont  Bkgd
(start)  (sec)     (DN)  (DN)
swp01407  24/04/78  08:21:37   6599.75   65   30
swp02394  25/08/78  03:22:46  22799.84  166   76
swp03133  24/10/78  23:08:51  21599.71  182   80
swp04454  02/03/79  13:17:20  28799.54  210   91
swp04757  26/03/79  05:24:16  17999.74  133   60
swp07147  14/11/79  21:03:28  24299.80  171   66
swp09954  30/08/80  02:46:27  25199.69  155   73
swp13427  07/03/81  14:52:49  17999.74  119   46
swp16576  19/03/82  11:11:15  25679.74  170   69
swp21211  01/10/83  18:25:22  12119.52   90   42
swp29326  29/09/86  01:30:35   7199.82   76   39
swp30928  07/05/87  12:57:40   6899.58   61   31
swp45438  26/08/92  07:04:35   6419.53   58   26