CAFOS: Flat Fields

  • To take Dome Flat Fields (screen): "Flatf. Pos." from the Telescope's GUI + "ffl" script:
  • The values given here can change if the ffl lamps age or are changed.


July 2021


FilterImagingImage bin2x2PolarimeterPolar+mask2
U300W 10s300W 2.5s300W 10s1000W 35s
B50W 13s50W 3s50W 15s1000W 1.6s
V50W 3s10W 15s50W 3s50W 6s
R10W 10s10W 2.7s10W 12s50W 1.5s
I10W 4s10W 1s10W 5.3s50W 1s
No filter5W 5s5W 1.5s10W 2.7s10W 6s
SDSS_r10W 15s10W 4sW sW s
SDSS_i10W 5s10W 1.5sW sW s
SDSS_g10W 2.5s10W 23sW s50W 5.5s
SDSS_u300W 9s300W 2.5sW sW s
657/11 Ha50W 6s50W 1.5sW sW s
658/5 Ha50W 18sW sW sW s
501/9 OIII300W 2.5sW sW sW s


Errors are shown as follows:

- Message or description
- Cause or periodicity, if known
- Solution

- Ice.ConnectionLostException error=0
Extremely random and frequent
Soved by resetting ICS, sometimes CUs
- Ice.ConnectionLost (Time Out NCU3222)
Extremely random
Soved by resetting ICS and NIR CU
- Err-4: expected count rate too low (or too high ?)
Solved by opening the ExpMeters
- Err-5: unknown error
Seen when selecting SCIENCE mode from SAFE mode
Solved by trying again
- Err-7: no object found and/or AG window doesn't respond (image frozen)
Happens rarely (last time 04-01-2020)
Change to work at pop-up AG windows instead, or reset ICS (see here)
- Err-11: telescope int error
Not sure
Solved by resetting the AG computer
- Nack-4: exposure already running
If exposure is stopped for any reason
Set to Sleep and Awake again, or reset ICS
- Nack-xx: ???????????????? Observation missing by NIR
Device response error popup on the ICS GUI.
Generally, due to GEIRS hangup. NIR cannot be used anymore.
At night, first try nireset-hardreset.
If that is not enough, use nireset-reboot + nireset-hardreset.
- Nack-31: Wrong parameter. Delay time (~start time)
It is due to the NIR Read & Reset count parameter set above 800s
The solution is to lower that number below 800 (it usually is around
half of the ExpTime)
- Lamp state mismatch
Defective lamp
Solved by changing lamp
- Network.cpp:2169
Scheduler opened too early before observations.
Solved by restarting Scheduler + ICS
- Time out AGC 1897 (or 1907)
Happens rarely (last time 18-08-2019)
Solved by stopping guider by hand and re-acquiring obj.
- Time out FFE
Probs in the FE
Solved by resetting the FE controller

- NIR subsystem device error
Solved by performing a sleep-wake up + science

- Broken promise
Not sure
Not sure how it was solved
- Future already retrieved
Random after reaching the target
Solved by acknowledging and repeating Observe command
- InvalidFocustepException
Happens when doing the focus sequence, it dosen't see stars.
Because clouds, dome closed, ...