Skip to main content

Content

Callout

Warning: if you plan to use the new quad filter inverse sensitivities to calibrate your data, please contact the WFC3 helpdesk first.

End callout

2020 Inverse Sensitivities

The quad filters' inverse sensitivities were re-calculated by using the new CALSPEC white dwarf models and the increased Vega reference flux (Bohlin et al. 2020). See ISR 2021-04 for more details.

Filter PHOTPLAM ABMAG VEGAMAG STMAG PHOTFLAM ERR_PHOTFLAM
  Å Mag Mag Mag erg cm-2 Å-1 e-1 erg cm-2 Å-1 e-1
FQ232N 2438 20.412 18.803 18.650 1.2587E-16 7.4676E-19
FQ243N 2479.22 20.738 19.108 19.015 9.0301E-17 9.5288E-18
FQ378N 3792.43 22.751 22.292 21.953 6.0299E-18 3.8173E-19
FQ387N 3873.66 21.340 21.274 20.588 2.0928E-17 2.8522E-19
FQ422N 4219.23 22.673 22.927 22.107 5.1880E-18 5.3523E-20
FQ436N 4367.17 21.630 21.678 21.139 1.2684E-17 3.1092E-19
FQ437N 4371.04 21.268 21.394 20.779 1.7282E-17 5.5396E-19
FQ492N 4933.46 22.868 22.938 22.641 3.1887E-18 1.5797E-20
FQ508N 5091.05 22.881 22.958 22.723 2.9976E-18 1.5032E-19
FQ575N 5757.69 20.530 20.471 20.639 2.0246E-17 7.3602E-19
FQ619N 6198.52 21.940 21.799 22.210 4.7187E-18 6.4863E-20
FQ634N 6349.21 21.958 21.781 22.279 4.4312E-18 7.6042E-20
FQ672N 6716.39 20.395 20.159 20.838 1.5193E-17 1.6124E-18
FQ674N 6730.69 20.692 20.454 21.141 1.6657E-17 6.8407E-18
FQ727N 7275.24 21.581 21.247 22.198 4.7367E-18 2.6141E-19
FQ750N 7502.5 21.502 21.131 22.186 4.6196E-18 2.9526E-19
FQ889N 8892.14 21.057 20.536 22.110 5.0706E-18 5.8733E-19
FQ906N 9057.76 20.951 20.431 22.044 5.3340E-18 2.4683E-19
FQ924N 9247.58 20.753 20.158 21.891 6.3554E-18 2.9059E-18
FQ937N 9372.41 20.648 20.167 21.815 7.2367E-18 4.2433E-19

 

Last Updated: 08/21/2025

HST Help Desk


Please contact the HST Help Desk with any questions.