The short-wavelength channel contains 1 extra wide, 5 wide-band (R~4), 4 medium (R~10), and 3 narrow-band (R~100) filters, while the long-wavelength channel contains 1 extra wide, 3 wide, 8 medium, 4 narrow-band filters as shown in the table below. Most filters are in the filter wheels; they are used with a pupil-stop placed in the CLEAR pupil wheel element. The few filters in the pupil wheels include their individual pupil stops and are paired with an appropriate blocking filter in the filter wheel.
The figure and table below show the total system throughput, henceforth referred to as Photon-to-Electron Conversion Efficiency (PCE), for all NIRCam filters. The PCE includes the effects of the Optical Telescope Element (OTE), NIRCam optical train, filters, and detector QE. It does not include losses due to the pupil stop. For filters in the pupil wheels, the PCE also includes the effects of the appropriate blocking filter in the filter wheel. Note that throughputs of individual components, most notably the OTE, are not finalized and subject to small changes.
For all filters, these values are the mean of the module A and module B PCE. Note that there is a non-negligible difference in the detector QE at the longest wavelengths in the Longwave Channel. In addition, several filters, most notably F480M, show differences in throughput between the module A and module B versions. In the future, separate module A and module B calculations will be possible using synphot.
Click filter name in the table below to download a copy of the PCE table (W2=Extra Wide, W=Wide, M=Medium, N=Narrow). Values are current as of Dec 2015.
|Short Wavelength Filters|
|Use||Long Wavelength Filters|
|Download all filters.|
|F150W2||F187N, F212N, and DHS Blocking Filter||F322W2||Background Min. Primarily used with grisms. Blocking filter for F323N.|
|F070W||General Purpose||F277W||General Purpose|
|F090W||General Purpose||F356W||General Purpose|
|F115W||General Purpose||F444W||General Purpose. Blcoking filter for F405N, F466N, F470N.|
|F150W||General Purpose||F250M||CH4, Continuum|
|F200W||General Purpose||F300M||Water Ice|
|F140M||Cool Stars, H2O, CH4||F335M||PAH, CH4|
|F162M||Cool Stars, Off-band for H2O||F360M||Brown Dwarfs, Planets, Continuum|
|F182M||Cool Stars, H2O, CH4||F410M||Brown Dwarfs, Planets, H2O, CH4|
|F210M||H2O, CH4||F430M||CO2, N2|
|F187N||Pa-alpha||F480M||Brown Dwarfs, Planets, Continuum|