A search for very high-energy flares from the microquasars GRS 1915+105, Circinus X-1, and V4641 Sgr using contemporaneous H.E.S.S. and RXTE observations

H.E.S.S. phase-I observations of the plane of the Milky Way

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Table 3

H.E.S.S. VHE γ-ray significances corresponding to hard and standard event selection regimes.

Target	Image Cuts	N_ON [events]	N_OFF [events]	α	Excess [events]	Significance [σ]
GRS 1915+105	Standard	471	7127	0.073	–51.6	–2.2
	Hard	36	783	0.060	–10.9	–1.6
Cir X-1	Standard	385	5959	0.068	–20.1	–1.0
	Hard	45	648	0.056	9.1	1.4
V4641 Sgr	Standard	161	2373	0.067	1.2	0.1
	Hard	11	275	0.055	–4.2	–1.11

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