Period-72 OB Execution Times

There are (currently) 8 templates defined in the FEROS IP (version 1.12).

FEROS_ech_acq.seq Target acquisition
FEROS_ech_cal_DRS.seq DRS Initialisation control
FEROS_ech_cal_bias.seq BIAS CALIBRATION exposures
FEROS_ech_cal_dark.seq DARK CALIBRATION exposures
FEROS_ech_cal_flat.seq FlatField CALIBRATION exposures
FEROS_ech_cal_wave.seq Wavelength CALIBRATION exposures
FEROS_ech_obs_objcal.seq Object/Calibration mode SCIENCE exposures
FEROS_ech_obs_objsky.seq Object/Sky mode SCIENCE exposures

Target and Intialisation

FEROS_ech_acq.seq

   ExecTime = ~5mins
4mins as per SM instructions for special presets including acquisition onto fibre plus 1min to allow for GRAB of TCCD image.

FEROS_ech_cal_DRS.seq

   ExecTime = 5sec

Exposure OBs

For the OBs including science exposures the following are defined:

  1. ROT = ReadOut Time for each exposure, depends on ROM = ReadOutMode, which is one of 60kHz,1,high|225kHz,1,low|625kHz,1,med
    • ROT[60kHz,1,high] = 145sec
    • ROT[225kHz,1,low] = 42sec
    • ROT[625kHz,1,med] = 22sec
  2. IST = Instrument Setup Time: maximum is ~1min.
  3. UIT = User Integration Time
  4. NEXPO = Number of exposures.

FEROS_ech_cal_bias.seq

   ExecTime = NEXPO * ( ROT[ROM] )

FEROS_ech_cal_dark.seq

   ExecTime = NEXPO * ( UIT + ROT[ROM] )

FEROS_ech_cal_flat.seq

   ExecTime = IST + NEXPO * ( UIT + ROT[ROM] )

FEROS_ech_cal_wave.seq

   ExecTime = IST + NEXPO * ( UIT + ROT[ROM] )

FEROS_ech_obs_objcal.seq

   ExecTime = IST + NEXPO * ( UIT + ROT[ROM] )

FEROS_ech_obs_objsky.seq

   ExecTime = IST + NEXPO * ( UIT + ROT[ROM] )