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RSAA runs its research telescopes within the Mount Stromlo Observatory and Siding Spring Observatories.
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Wide-Field Spectrograph (WiFeS)
WiFeS can be an integral-field, or imaging, spectrograph, which means that a spectrum is recorded by it from each pixel associated with the area this is certainly imaged. WiFeS ended up being created and built at RSAA and set up in the 2.3m telescope in might 2009. The style attracts 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 manufactured by RSAA when it comes to Gemini Observatory.
WiFeS is made to deliver as much simultaneous spectra as feasible over a consistent area for the sky, each covering since wide a spectral range as you possibly can. It runs over the full wavelength range that is optical. Two split digital cameras are acclimatized to record the spectra, each optimised for a part that is particular of wavelength range. More info about spectroscopy and exactly how WiFeS works can be seen within this article WiFeS therefore the art that is fine of.
WiFeS will be useful for a range that is wide of applications, including:
- Findings of enigmatic, really remote Gamma-Ray Bursts
- Studies of old movie stars within our Galaxy that will offer information regarding exactly exactly how it had been put together
- Studies of mass being ejected from young movie movie stars which are nevertheless being formed and tend to be much like our Sun, to know just just how planets form
- Dimensions of this interior motions in galaxies to find black colored holes within their cores and dark matter in their exterior parts
- Studies regarding the motions of gas 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 digital camera
- Pixel size: 15 microns
- Pixel scale: 1 arcsec (slitlet width) x 0.5 arcsec (spatial sampling along slitlets)
Information for observers
WiFeS is just a double-beam, image-slicing, integral-field spectrograph that records optical spectra more than find a bride a contiguous 25 arcsec x 38 arcsec industry of view. This spatial field is divided in to twenty-five 1 arcsec wide “slitlets” with 0.5 arcsec sampling across the 38 arcsec lengths.
Each for the digital cameras for the blue and red stations are designed with a x that is 4k pixel CCD detector. The spectrum of the tool runs from 330 to 920nm. This range could be seen in a solitary publicity of each and every of the red and blue digital digital digital cameras utilizing the low-resolution grating setup (R=3000) plus in two exposures utilizing the pair of four high-resolution gratings (R=7000).
Specs
- 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 cameras that are blue
- Pixel size: 15 microns
- Pixel scale: 1 arcsec (slitlet width) x 0.5 arcsec (spatial sampling along slitlets)
The documents displayed on the right hand side of the page and you might also find useful the following site for more information about the specifications and use of the WiFeS instrument, please download
WiFeS gratings
| Grating | Ruling thickness (lines/mm) | Blaze wavelength (micron) | resolution coverage that is simultaneousnm) | 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 |
Efficiency
Begin to see the book Dopita et al. (2009) for detailed information regarding the performance associated with tool.
Measured throughput
The calculated throughput that is final of tool (and telescope) are plotted below for every grating (except that U7000).