obsid   target                  start time	int time        inst    ccd     grat    avg # of events/sec
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10643	Cas_A[S3,-120,-     	130:52497.441	2.1	ACIS-S	S4	NONE	190.948
10935	Cassiopeia_A        	306:81473.732	23.6	ACIS-S	S1	NONE	302.556
12020	Cassiopeia_A        	307:81510.306	23.0	ACIS-S	S1	NONE	300.159