Table 5

Estimated maximum VHE γ-ray luminosities of the target microquasars, which would still be consistent with a non-detection given the flux upper limits presented in Table 4.

Target Maximum distance estimate Ethresh Luminosity above Ethresh
[kpc] [GeV] [erg s−1]
GRS 1915+105 10.6 562 <2.3 × 1034
Cir X-1 10.2 562 <3.4 × 1034
V4641 Sgr 6.9 237 <2.5 × 1034

Notes. Source distances correspond to the largest estimate that was found in the literature (see Sect. 2). The energy threshold of Cherenkov telescope arrays increases with observational zenith angle.

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