| From | To | Comment |
| 2002-03-22 | 2003-07-25 | MIT CCD installed, number of spectroscopic flat fields = 3 |
| 2003-07-26 | 2006-10-23 | number of spectroscopic flat fields = 5 |
| 2006-10-24 | 2008-03-31 | spectroscopic flat fields and arc lamp taken within same template, switch to LANDOLT standard star catalog |
| 2008-04-01 | 2012-12-31 | new IMG pipeline, IPOL assoc improved |
| 2013-01-01 | 2013-11-14 | Please be aware that for FORS2 spectroscopic science observations
taken between January 1, 2013 and May 31, 2013 the calSelector service
may occasionally offer only the dynamically generated list of associated calibrations. In this situation quality of the
calibration files cannot be guaranteed. In particular, some of the
calibration frames may be saturated or underexposed.
As of June 1, 2013 and until further notice, the calSelector service does not provide any static associations for the FORS2 spectroscopic science data, for all spectroscopic modes. We strongly recommend that the Users check the dynamically generated list of calibrations for possible saturated or underexposed frames. Users are encouraged to refer to the raw data ESO Archive to retrieve additional calibration frames that may be needed to properly calibrate spectral observations. |
| 2013-11-15 | present | Situation with occurrences of saturated spectral flats improved. Spectroscopic modes of FORS2 are supported again. Static solution in the calSelector is again available. |