Changes between Version 1 and Version 2 of Hardware


Ignore:
Timestamp:
Oct 2, 2021, 7:27:45 AM (12 months ago)
Author:
holtz
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • Hardware

    v1 v2  
    22The telescope is a 24" (61cm) Boller and Chivens reflector, serial number 3480. It was delivered in early 1967. It is an equatorial mount, with the RA counterweights in the base and the declination counterweights attached to the rear of the tube.
    33[attachment:"UoR24in manual.pdf" Manual from similar University of Rochester telescope.] The original manual furnished with the NMSU telescope has been additionally scanned as a PDF.
    4 The telescope is designed to switch between a Cassegrain secondary mirror cell system, offering f/40 and f/75 focal ratios, and a Newtonian secondary mirror cell with a f/5 focal ratio. Ever since the renovation, the Newtonian mirror cell has been installed. Note that although the focal ratio with the Newtonian cell is f/5 we have a coma corrector mounted in front of the camera, giving an effective overall ratio of f/5.6.
     4The telescope is designed to switch between a Cassegrain secondary mirror cell system, offering f/40 and f/75 focal ratios, and a Newtonian secondary mirror cell with a f/5 focal ratio. Ever since the renovation, the Newtonian mirror cell has been installed. Note that although the focal ratio with the Newtonian cell is f/5 we have a coma corrector (2" Astrotech ATCC) mounted in front of the camera, giving an effective overall ratio of f/5.6.
    55Mounted on the side of the telescope is a 6" two-element refractor guide scope, which is currently unused- note that the instrumentation mounted at the Newtonian focus is directly in front of the guide scope, thus blocking the optical path.
    66
    77The telescope home position is at declination -40°, and 1 hour east of directly south. Telescope communication and control is via a [http://www.siderealtechnology.com/ Sidereal Technology Servo Controller II].
     8
     9
     10== Filters and filter wheel ==
     11
     1250mm round filters purchased from Custom Scientific fall 2020: SDSS ugriz, BVR (old style), Halpha filter. Diffusers D25 and D38 purchased from VIAVI (RPC photonics) spring 2021.
     13
     14Filter wheel is a Finger Lakes Instrumentation Centerline CL-1-14, purchased through Starizona summer/fall 2021. FLI software and Centerline software installed from FLI web site. This is a two-wheel filter wheel, with 7 slots (0-6) in each wheel. Installed ugriz, Halpha in slots 1-6 wheel0, BVR, D25, D38 in slots 1-5 wheel. After installation of filters, need to run FLIFilter.exe (seems different from FLIFilter App!) and Home filter wheel. ASCOM driver loaded from FLI (in Kepler ASCOM download). Not clear if indexing can be redone using FLIFilter.exe (see configuration window from menu). Default ordering is [06564321]/0, [0654321]/1, etc. for wheel0/wheel1. Only define useful combinations in MaxIM DL to keep menu from being too long (49 combinations).
     15
     16
     17== Guider ==
     18
     19Because 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.
     20
     21== Camera ==
     22
     23QHY 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.
    824
    925== Dome ==