2. 4 meter 3 mirror anastigmat telescope utilizing the nro telescope components


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2.4 meter 3 mirror anastigmat telescope utilizing the NRO telescope components.

  • 2.4 meter 3 mirror anastigmat telescope utilizing the NRO telescope components.

  • Dichroic splitting of the optical paths to produce 4 fields of view, each of which images 0.25 sq. degrees.

  • WNEW contains 8 filters in two sets of four that can be viewed simultaneously.

  • The plate scale is 0.11” per pixel.

  • WNEW also contains 8 grisms for low resolution spectroscopy



Four fold dichroic multiplexing optimizes the very large field of view to maximize the scientific return.

  • Four fold dichroic multiplexing optimizes the very large field of view to maximize the scientific return.

  • WNEW is based on a previously funded Origins Probe study, the Galaxy Evolution Probe, with a very well studied and mature design.

  • WNEW achieves all of the WFIRST DRM science in approximately 1/3 of the time in twice as many filters.

  • The WNEW capabilities enable science significantly beyond the scope of WFIRST.





Each array of detectors has two filters and two grisms to provide 8 photometric bands.

  • Each array of detectors has two filters and two grisms to provide 8 photometric bands.

  • Each dichroic assembly has two dichroics.











WNEW can implement all of the WFIRST DRM2 programs in less time with twice as many photometric bands.

  • WNEW can implement all of the WFIRST DRM2 programs in less time with twice as many photometric bands.

  • The 8 WNEW photometric bands greatly enhances the scientific productivity of the WFIRST DRM2 programs.

  • The reduced time to implement the DRM2 programs provides extra time for innovative programs not envisioned for WFIRST.



Survey of 3400 sq. degrees to ABmag=26

  • Survey of 3400 sq. degrees to ABmag=26

    • WFIRST: 429 days for 4 filters
    • WNEW: 122 days for 8 filters
  • Survey of 3400 sq.deg R=600 ABmag=22.5 per pixel

    • WFIRST: 284 days
    • WNEW: 61 days
  • Survey of Gal. Plane 1240 sq. deg. ABmag =25.1

    • WFIRST: 160 days for 4 filters
    • WNEW: 15 days for 8 filters


Monitor >2 sq. degrees for J=20.5 star with S/N=100 for 250 total days.

  • Monitor >2 sq. degrees for J=20.5 star with S/N=100 for 250 total days.

  • Cadence < 15 Minutes

  • Time for WNEW to reach S/N=100 for J=20.5 in 4 filters is 224 seconds = 3.75 minutes.

  • Better than 0.4” resolution

  • WNEW has 0.11” pixels

  • Automatic color information in at least 4 bands



WNEW easily meets all of the WFIRST DRM requirements in far less time than WFIRST.

  • WNEW easily meets all of the WFIRST DRM requirements in far less time than WFIRST.

  • WNEW easily meets all of the WFIRST DRM requirements in twice as many filters than WFIRST

  • WNEW can exceed all of the WFIRST DRM requirements and still have time for additional science goals.



Very deep imaging in 4 fields of 1 square degree for 1 year.





The WNEW concept was developed during two funded studies as an origins probe. As such it has a very mature design.

  • The WNEW concept was developed during two funded studies as an origins probe. As such it has a very mature design.

  • WNEW simplifies the original concept by retaining only infrared bands and restricting the focal plane to a single detector type.

  • Many components already have preliminary or in some cases a mature design.







Four focal planes utilizing 16 H4RG detectors (4kx4k) each.

  • Four focal planes utilizing 16 H4RG detectors (4kx4k) each.



In drift away or L2 orbit the mirrors

  • In drift away or L2 orbit the mirrors

  • instrument and detector systems are

  • radiatively cooled with no cryogenics

  • required.

  • Data transmission requires only 5 hours

  • of DSN reception per day on a moderate size receiver equivalent to the Univ. of AZ 12m dish on Kitt Peak.



WNEW provides a greatly enhanced platform for carrying out the proposed WFIRST science program at higher sensitivity, in less time and with twice as many photometric bands.

  • WNEW provides a greatly enhanced platform for carrying out the proposed WFIRST science program at higher sensitivity, in less time and with twice as many photometric bands.

  • WNEW provides new science capabilities to go beyond the proposed WFIRST program.

  • WNEW could start tomorrow.




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