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Onkar Rekhi

Onkar Rekhi

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  1. We will follow SBIG ST4 Manual: Quick Start Guide (pgs 4-7; https://drive.google.com/file/d/1eZHGE03GMtdPJj9Op_cJs9yjb29Hh9o2/view?usp=share_link)
  2. After plugging in Guider CCD to ST4, it showed "99 0 0"
  3. Cardboard box is covering light baffle
  4. Connor and Shrey are trying to find a set of settings that gives ANY other value for the readout, other than "99 0 0"
    1. EA (Exposure Adjust) was set to its lowest value (0.1s)
    2. b (Boost Factor) was set to its lowest value (1)
    3. BA (Brightness Adjustment) was set to its normal value (A), which only collects data from one pixel
      1. As opposed to "F" which sums the pixel value along with its eight neighbors
  5. Connor and Shrey took a Dark Frame, and then switched back to "Find and Focus".
  6. The display then showed "0 0 0"
    1. This makes sense since the Dark Frame is subtracted from the value
  7. Moved on to step 5 of the start up guide.
    1. opened shutters, mirrors, and uncovered baffle
    2. pressed "find and focus" per guide instructions
    3. slewed to capella, eye balling it confirmed its probably capella
    4. values still "0, 0, 0"
  8. restarting, NEW PLAN
    1. removed ccd, installed on-axis camera to confirm we are pointing at capella as a test star
    2. removed on-axis camera, installed ccd
    3. closed dome, darkened dome, covered baffle with box
    4. beginning step 1 of quick start guide (again)
  9. ATTEMPT 2
    1. step 1: ccd installed and powered, currently reading "99, 0, 0"
    2. step 2: beginning calibration, waiting two minutes
    3. step 3: still at "99, 0, 0"
    4. step 4: taking dark frame, dropped to "0,0,0"
    5. step 5: "find and focus" pressed, removed box, opening shutters, already slewed to capella
      1. still seeing "0,0,0"
      2. next steps?
    6. deviating from the manual, going to try and adjust EA to the maximum value and see if we can get anything besides 0
      1. roy raised a point, if the max value is 99 and we are using the value as the dark value, no matter what we get we could just be subtracting 99 and getting 0 for every capture we take
      2. SUCCESS? we got a value of 99
      3. display refreshes every 20 seconds
    7. reduced EA to 1 second
      1. still getting 99
    8. reduced EA to 0.1 seconds
      1. getting 99???
      2. this may be because when we change certain settings, we need to take a new dark frame
    9. changing EA to 20 seconds, shutting hatch, taking another dark frame


ToDo

Notes

  1. We don't know where the adapters are for the planetary camera ↔ GAM-lite
  2. Second DC monitor is not on. Primary monitor is flickering.
  3. There is no set of caps/coverings for filter wheel. We feel weird leaving it in a rando
  4. There are concerns over the lower shutter overdriving after closing, but still driving until upper shutter closes
  5. Might have located MEADE telescope cover

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