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vatt:instrumentation_and_computers [2021/03/31 12:23]
paul [VATT CCD Spectrograph - VATTSpec] 		vatt:instrumentation_and_computers [2021/03/31 21:22]
paul [VATT CCD Spectrograph - VATTSpec]
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 ===== VATT CCD Imager - Vatt4k ===== ===== VATT CCD Imager - Vatt4k =====
  
-- A replacement STA0500A back illuminated 4K CCD, ITL serial number 8301, was installed March 2017, and updated 26 January 2018. +  * [[vatt:vatt4k|VATT4k]]
-- It is similar to the September 2007 one, including its QE. +
-- Pixels: 4096x4096, 15x15 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.+
    
  
 ===== Galway Ultra Fast Imager - GUFI ===== ===== 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. +  * 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. +  * Field of view on VATT, 3 arcmin with current focal reducer. 
-- On loan from NUI Galway, currently until June 2011. +  * 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.+  * Consult Richard Boyle for technical details, and see the [[http://astro.nuigalway.ie/astro/research/cool_stars_brown_dwarfs_exoplanets/|NUI Galway "Brown Dwarfs and Substellar Objects" group]].
    
  
 ===== VATT CCD Spectrograph - VATTSpec ===== ===== VATT CCD Spectrograph - VATTSpec =====
  
-[[vatt:vatt4k|VATT4k]]+  * [[vatt:vattspec|VATT Spectrograph]] 
 +===== Instrument Interface (a.k.a. the Guider Box) =====
  
-- This optical region spectrograph has AR coated refractive optics, with a beam size at its camera of 125 mm, giving ... +  * provides interface to derotator for all the above instruments, as well as offset and slit-viewing guidingwith guide cameras  
-- slit length: 30 arcsec +  * effective back focal distance, from guide box to focal surface, is 2.000". 
-- wavelength range: 360 - 950 nm +  * contains two filter wheels, each holding four 3.48" square filters. Adapters to accommodate 2" and 3" square filters are available. 
-- spectral coverage: 100 nm at 0.1 nm resolution +  * UBVRI, uvby, Vilnius, Sloan, ECAS, and Order Blocking filters are currently provided. 
-- spectral resolutions: 0.1, 0.2, and 0.4 nm with 1 arcsec wide slit +  * integrating sphere with continuum and calibration lamps.
-- 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). +
-  +
- +
-===== 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.+
vatt/instrumentation_and_computers.txt · Last modified: 2021/03/31 21:23 by paul

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