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ALFOSC photometric zero point monitoring

    Setup:

  • ALFOSC
  • "standard" filters (U#7, B#74, V#75, R#76, i#12)

    Weather

  • no clouds   if you are not sure if it is photometric, go ahead, the reductions will show you if it was photometric or not

Instructions:

    TCS:

  • pick a low-airmass star from the catalogue (+-1.5 hours from meridian), and preset to it (e.g. tcs.guide-object A_F11 )
  • make sure you are auto guiding

  • alternatively load /catalogue/alphot.cat , preset to the object and make sure you are auto guiding

    ALFOSC:

  • resetxy (if needed)
  • choose filter and set appropriate TCS focus-offset
  • check that all the other wheels are on open position
  • expose and check, using 'QuickExam', that the peak counts of all the stars are around 30-350 kADU or so
  • do all five filters
  • NOTE!   No calibration frames are needed

Data analysis:

  • add a comment in the end-of-night report, so I (TP) can process the data.

Back to top Last modified: 08-Mar-2012