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

• VATT4k
• A replacement STA0500A back illuminated 4K CCD, ITL serial number 8301, was installed March 2017, and updated 26 January 2018.
• It is similar to the September 2007 one, including its QE.
• Pixels: 4096×4096, 15×15 microns
• Gain:1.9 e/DN
• Full well: ADC limited (65k DN) = ~120,000 electrons unbinned
• Noise: ~3.9 electrons
• Photon Transfer Curve
• Gain Curve
• 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.

• 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 “Brown Dwarfs and Substellar Objects” group.

• VATT Spectrograph
• 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, with very nice cosmetics.

   ITL Serial Number 8228
   2688x512 pixels, 15x15 microns
   Detector operating temperature -110C
   Gain: 1.3 e/DN with setting 10; 2.6 e/DN with setting 5
   Full well, both gains: ADC limited (65k DN) = 85,000 or 170,000 electrons
   Noise: 3.4 electrons (3.2 in overscan region)
   QE Curve

• 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).

• provides interface to derotator for all the above instruments, as well as offset and slit-viewing guidingwith guide cameras
• 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.