Research class of Astronomy & Astrophysics. Basic requirements

Research class of Astronomy & Astrophysics. Basic requirements

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Advanced Instrumentation and Technology Centre

AITC supports the growth of the next generation of instruments for astronomy and room technology.


RSAA runs its research telescopes into the Mount Stromlo Observatory and Siding Spring Observatories.

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Wide-Field Spectrograph (WiFeS)

WiFeS is definitely an integral-field, or imaging, spectrograph, which means that it records a range from each pixel associated with area that is imaged. WiFeS ended up being created and built at RSAA and set up in the telescope that is 2.3m might 2009. The look draws upon the history of both the RSAA’s Dual-Beam Spectrograph (DBS), additionally the image-slicer that is concentric regarding the Near-infrared Integral-Field Spectrograph (NIFS) which was produced by RSAA when it comes to Gemini Observatory.

WiFeS was created to deliver as much spectra that is simultaneous feasible over a continuing area regarding the sky, each covering since wide a spectral range as you can. It runs throughout the complete optical wavelength range. Two split digital digital cameras are acclimatized to record the spectra, each optimised for a particular section of this wavelength range. Extra information about spectroscopy and just how WiFeS works can be seen when you look at the content WiFeS while the art work of spectroscopy.

WiFeS will be employed for a broad selection of medical applications, including:

  • Findings of enigmatic, really gamma-Ray that is distant
  • Studies of old movie movie stars within our Galaxy that will offer details about exactly just just how it had been put together
  • Studies of mass being ejected from young movie movie stars being nevertheless being created and are usually much like our Sun, to comprehend just just exactly how planets form
  • Dimensions regarding the interior motions in galaxies to look for black colored holes within their cores and matter that is dark their external components
  • Studies regarding the motions of gasoline around remote quasars and radio galaxies.

Fundamental specs

  • Field of view: 38 x 25 arcsec (25 slitlets which are 1 arcsec wide and 38 arcsec long)
  • Wavelength protection: 330 – 900 nm
  • Detectors: 4096 x 4096 pixel Fairchild Imaging CCD in each camera
  • Pixel size: 15 microns
  • Pixel scale: 1 arcsec (slitlet width) x 0.5 arcsec (spatial sampling along slitlets)

Information for observers

WiFeS is really a double-beam, image-slicing, integral-field spectrograph that records optical spectra more than a contiguous 25 arcsec x 38 arcsec industry of view. This spatial industry is divided in to twenty-five 1 arcsec wide “slitlets” with 0.5 arcsec sampling over the 38 arcsec lengths.

Each regarding the digital cameras for the blue and red stations are designed with a x that is 4k pixel CCD detector. The range that is spectral of tool expands from 330 to 920nm. This range may be seen in a single exposure of every of the red and blue digital cameras with the low-resolution grating configuration (R=3000) as well as in two exposures utilizing the group of four high-resolution gratings (R=7000).


  • Nasmyth focus, tool de-rotator
  • Concentric image-slicing IFU
  • Field of view: 38 x 25 arcsec (25 slitlets which are 1 arcsec wide and 38 arcsec long)
  • Wavelength protection: 330 – 920 nm
  • Detectors: 4096×4096 pixel Fairchild Imaging CCDs (red and blue cameras)
  • Pixel size: 15 microns
  • Pixel scale: 1 arcsec (slitlet width) x 0.5 arcsec (spatial sampling along slitlets)

To find out more in regards to the specs and make use of of this WiFeS instrument, please down load the documents presented regarding the right hand part associated with web page and also you may additionally find useful the next website:

WiFeS gratings

Grating Ruling thickness (lines/mm) Blaze wavelength (micron) quality Simultaneous coverage (nm) Wavelength period (nm) Wave. Offset (pix) Y offset
U7000 1948 0.385 7000 0.109 0.329 0.438 0 0
B7000 1530 0.49 7000 0.14 0.418 0.558 0 0
R7000 1210 0.62 7000 0.177 0.529 0.706 0 0
I7000 937 0.8 7000 0.229 0.683 0.91 0 0
B3000 708 0.468 3000 0.27 0.32 0.59 0 0
R3000 398 0.742 3000 0.45 0.53 0.98 0 0


Begin to see the book Dopita et al. (2009) for detailed information on the performance of this tool.

Measured throughput

The calculated throughput that is final of tool (and telescope) are plotted below for each grating (except that U7000).