Differences

This shows you the differences between two versions of the page.

--- vatt:vattspec [2018/03/19 20:41]
paul
+++ vatt:vattspec [2021/03/31 21:24] (current)
paul
@@ Line 1: / Line 1: @@
 ====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.
-===Documentation===
+  STA0520A CCD
-*[[http://www.vovatt.org/media/pdf/VATTSpec-Instructions.pdf|General Instructions]]
+×512 pixels, 15 microns
-*[[http://www.vovatt.org/media/pdf/VATTSpec-Guider-Notes.pdf|Instructions on Guiding]]
+  ITL Serial Number 8228
+  Detector operating temperature -110C
+  Gain = 1.3 e/DN with setting 10
+  Gain = 2.6 e/DN with setting 5
+  For both gains the full well is ADC limited (65k DN), so this is 85,000 or 170,000 electrons.
+  Noise is 3.4 electrons (3.2 in overscan region)
+  * [[VATT:vatt-vattspec_efficiency|efficiency]]: determined by Mark Wagner for telescope plus spectrograph
+  * further details are under the {{ :vatt:vattspec-instructions.pdf|General Instructions}} for use of the VATT Spectrograph.
+  * bandpass [[vatt:filters|filters]] available: S8612 (red blocking); GG-400, GG-475, OG-550 (cut-offs to the blue in nm).
+===Documentation===
+  * {{ :vatt:vattspec-instructions.pdf |General Instructions}}
+  * {{ :vatt:vattspec-guider-notes.pdf |Instructions on Guiding}}
 ===Maintenance===
- *Argon Calibration Lamp was replaced on 4/26/2013.
+  * Argon Calibration Lamp was replaced on 4/26/2013.
-   Note: There is some concern the lamps are burning out faster than they should.
+  * Note: There is some concern the lamps are burning out faster than they should.
+===Chip QE Curve===
+{{:vatt:qe_vattspec.png|}}

MOON

User Tools

Site Tools

Differences

Page Tools