The Vatican Advanced Technology Telescope

VATT Instrumentation and Computers

Current instruments and computing equipment available at the Vatican Advanced Technology Telescope are:

VATT CCD Imager - Vatt4k
- A replacement STA0500A back illuminated 4K CCD was installed March 2017, and updated 8 October 2017.
- It is similar to the September 2007 one, including its QE. The full well is limited by the ADC (65,000 DN), so this is about 117,000 electrons unbinned. Noise is about 3.9 e rms. Gain =1.8 e/DN.
- Pixels: 4096x4096 15x15 microns
- FOV: 12.5 arcmin square
- pixel scale: 0.188 arcsec/pixel
- wavelength range: 300 - 1000 nm, peak 96% at 450 nm
- Preamplifiers added October 2008 inside the dewar. These give faster readout and lower noise.
- Full technical details for replacement CCD, serial number 8301, will be updated at the Imaging Technology Laboratory site under VATT systems


Galway Ultra Fast Imager - GUFI
- This L3CCD system, based on an Andor iXon back-illuminated CCD camera, gives a readout time of only 2ms, extremely high time resolutions of up to 400 images a second (subframed), and very low light level sensitivity.
- Field of view on VATT, 3 arcmin with current focal reducer.
- On loan from NUI Galway, currently until June 2011.
- Consult Richard Boyle for technical details, and see the NUI Galway Cool Stars, Brown Dwarfs and Exoplanets group.


VATT CCD Spectrograph - VATTSpec
- This optical region spectrograph has AR coated refractive optics, with a beam size at its camera of 125 mm, giving ...
- slit length: 30 arcsec
- wavelength range: 360 - 950 nm
- spectral coverage: 100 nm at 0.1 nm resolution
- spectral resolutions: 0.1, 0.2, and 0.4 nm with 1 arcsec wide slit
- detector: back illuminated, low noise CCD STA0520A CCD, with very nice cosmetics
     2688x512 pixels
     See details of this UA ITL Serial Number 8228 CCD
- efficiency: determined by Mark Wagner for telescope plus spectrograph
- further details are under the Instructions for use of the VATT Spectrograph.
- bandpass filters available: S8612 (red blocking); GG-400, GG-475, OG-550 (cut-offs to the blue in nm).


Offset and slit-viewing guide box with CCD guide camera
- provides interface to derotator for all the above instruments.
- effective back focal distance, from guide box to focal surface, is 2.000".
- contains two filter wheels, each holding four 3.48" square filters. Adapters to accommodate 2" and 3" square filters are available.
- UBVRI, uvby, Vilnius,  Sloan, ECAS, and Order Blocking filters are currently provided.
- integrating sphere with continuum and calibration lamps.


Contact Us

Richard P. Boyle, S.J.
VATT Telescope Scientist

Tel: +1 (0)520 621 3230


Christopher J. Corbally, S.J.
President of the National Committee to IAU

Tel: +1 (0)520 621 3225


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