Changes between Version 6 and Version 7 of Hardware


Ignore:
Timestamp:
Oct 12, 2021, 2:42:29 PM (12 months ago)
Author:
holtz
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • Hardware

    v6 v7  
    2121QHY 600 installed in spring 2021, purchased from OPT (along with a QHY CFW-3 filter wheel). This is a CMOS camera that uses a Sony IMX 455 sensor, with 9576 x 6388 3.76 micron pixels. QHY software allows for 1x1 and 2x2 binning. Given the small pixels, the latter is used.
    2222
     23Camera needs to have a coma corrector, currently AstroTech Coma Corrector, in front of it, which pushes focus back. This results in an effective focal ratio of f/5.6 (f/5 without). This is designed so that the last optical element should be ~75mm from focal plane; currently is much closer (~40mm?).
     24
     25=== obsolete ===
     26
     27Previous camera was a QSI 583 science camera, connected with a Type A USB cable. The science CCD is usually set to a temperature of -20° C, but on very hot nights may not reach that temperature. Typical field of view is 18.4x13.8 arcminutes, with an unbinned plate scale of ~0.33"/pixel and an array size of 3326x2504 px. Available filters are B,V,R,I, and clear. Typical read noise is ~8 electrons. QSI583 has 5-slot filter wheel, offering B,V,R,I, and clear filters.
     28
     29The guide camera is a ​Starlight Xpress "Lodestar" autoguider, installed in the integrated port on the science camera. The guide camera points 17' south of the center of the science field. Guider has a plate scale of ~0.5"/pixel and a field of view of 6.14x4.85 arcminutes, with a pixel array size of 752x580 pixels. The guider is uncooled. ACP Scheduler does not attempt autoguiding for exposures shorter than 250 seconds. The guide camera requires several small spacers to make it parfocal with science camera, and is connected with a mini-USB cable.
     30
     31MaximDL: QSI Universal, SX Universal drivers.
     32
    2333== Guider ==
    2434
    25 Because of concerns of too much back focal distance with FLI centerline and offset guider, guider moved to 6" finder scope spring 2021. Use Starlight Xpress, purchased Starlight Xpress Ultrastar Pro from Starizona summer/fall 2021.
     35Because of concerns of too much back focal distance with FLI centerline and offset guider, guider moved to 6" finder scope spring 2021. Use Starlight Xpress, purchased Starlight Xpress Ultrastar Pro from Starizona summer/fall 2021, installed 10/21.
    2636
    2737