obsid   target                  start time      int time    inst    ccd     grat    drop rate(%)
-----------------------------------------------------------------------------------------------------------
13204	Crab                	15:00882.302		 4.6	ACIS-S	S1		NONE	27.0
13219	Cyg_X-1             	36:24894.392		12.1	ACIS-S	S6		HETG	44.6
13205	Crab                	47:61182.142		 4.6	ACIS-S	S1		NONE	26.7
13206	Crab                	74:22293.595		 4.6	ACIS-S	S1		NONE	26.8
13207	Crab                	102:51782.527		 4.6	ACIS-S	S1		NONE	26.5
13150	Crab_Nebula         	103:85213.355		 9.6	ACIS-S	S1		NONE	27.0
13151	Crab_Nebula         	104:52812.749		 9.6	ACIS-S	S1		NONE	27.1
13152	Crab_Nebula         	106:31962.834		 9.6	ACIS-S	S1		NONE	27.4
13153	Crab_Nebula         	111:84765.620		 9.6	ACIS-S	S1		NONE	27.6
13154	Crab_Nebula         	118:24462.232		 9.6	ACIS-S	S1		NONE	27.6
13208	Crab                	227:32921.356		 4.6	ACIS-S	S1		NONE	26.1
13209	Crab                	258:15424.000		 4.6	ACIS-S	S1		NONE	25.8
13210	Crab                	288:17929.481		 4.6	ACIS-S	S1		NONE	25.6
13750	Crab                	331:64998.697		 4.6	ACIS-S	S1		NONE	25.6