Estimated NIRISS Imaging Sensitivity (S/N = 10 in 10000 seconds)
Based on the Bohlin Vega model spectrum from
http://www.stsci.edu/hst/observatory/cdbs/calspec.html.
Filter Central Sensitivity magnitude
Wavelength
(microns) (nJy)
-----------------------------------------------------
F090W 0.90 11.28 28.28
F115W 1.15 11.22 28.06
F140M 1.40 14.80 27.43
F150W 1.50 9.19 27.83
F158M 1.59 12.88 27.39
F200W 1.99 7.81 27.54
F277W 2.77 6.63 27.09
F356W 3.60 6.89 26.56
F380M 3.80 18.74 25.34
F430M 4.27 28.32 24.65
F444W 4.44 12.29 25.49
F480M 4.81 36.85 24.14
-----------------------------------------------------
Magnitudes are estimated by scaling from the Vega model
spectrum, which is assumed to have m=0.03 in all filters.
The sensitivity values in nJy are for a Vega-like spectrum
and would be somewhat different if the source spectrum had
a different shape. The values are quoted for the central
wavelength of each filter.
