National Aeronautics and Space Administration

HEAO-1 Software:
Standard Background Table for A2 Detectors

Time (Day of 1977)		232-285	390-410	485-500	583-588
HED1	DS1	6.075	6.07	5.968	6.042
	2	10.775	10.76	10.643	10.812
	3	1.655	1.63	1.551	2.182
	4	2.275	2.27	2.167	1.182
	SUM	20.78	20.73	20.329	20.598
HED2	DS1		9.98	9.722	9.877
	2		16.33	16.079	16.43
	3		2.57	2.469	2.431
	4		3.29	3.207	3.137
	SUM	32.29	32.17	31.477	31.875
MED	DS1	4.60	4.73	4.687	4.99
	2	2.66	2.71	2.655	2.873
	3	2.15	2.17	2.193	2.265
	4	1.25	1.23	1.202	1.281
	SUM	10.62	10.84	10.737	11.409
HED3	DS1	7.155	7.13	7.024	6.744
	2	4.415	4.41	4.305	4.139
	3	2.02	1.97	1.906	1.833
	4	1.68	1.64	1.570	1.517
	SUM	15.27	15.15	14.805	14.233

The user should choose the set of background values which are closest in time to the user’s input. Add or subtract the desired discovery scalar background values according to necessity.