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EEV7

On 31/1/2002 we have done wide-slit observations with camera 2 of flux-standard star HD93521. These on-blaze results are for AirMass=1, and do not include slit losses. Exposure times for a U=B=V=R=I=8 star in typical observing conditions reaching S/N=100 per pixel at the blaze in the extracted unbinned spectrum are given as well (for the case of no slit losses).

AB magnitude: the magnitude of a star giving 1 e-/Å/s.
Efficiency: ratio of detected and emitted stellar flux (with flux in energy/s/Hz/area).

wavelength AB magnitude NOT+SOFIN+EEV7 efficiency expo time for
S/N=100 and m=8
Dispersion
Å/pixel
3500 12.3 0.1% 8300s (450000 e-/Å) 0.022
3600 12.6 0.1% 6700s (450000 e-/Å) 0.022
4000 13.5 0.3% 2600s (380000 e-/Å) 0.026
4500 14.0 0.6% 1500s (370000 e-/Å) 0.027
5000 14.4 1.1% 820s (310000 e-/Å) 0.032
5500 15.0 1.9% 440s (280000 e-/Å) 0.035
5800 15.1 2.2% 380s (260000 e-/Å) 0.038
6500 15.1 2.6% 340s (240000 e-/Å) 0.042
7500 15.0 2.6% 360s (210000 e-/Å) 0.048
8000 14.5 1.8% 500s (190000 e-/Å) 0.053
8500 14.0 1.2% 750s (180000 e-/Å) 0.056
9000 13.7 1.0% 900s (170000 e-/Å) 0.059


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