Frame Dry Runs

FLAMES SV Observations

The FLAMES Dry Runs took successfully place between the end of January and beginning of February (Jan 24 - Feb 03, 2003). More than 5200 spectra were collected during the ten observing nights. The high efficiency of these Service Mode observations allowed to achieve a very satisfactory completion rate of the proposed science cases. In the figure below,  Science  represents the time spent "on-target", whereas the  Science+Acquisition  values include also the time spent for the acquisition of the observed fields (total observing time available per night has been normalized to one).

Observing Efficiency

Note:    few more observations were executed during part of few extra nights (in February 2003) and they will be released as soon as they are available from the Science Archive. These additions concern the program on NGC2808 (for the determination of its geometric distance), the program on the elliptical galaxy NGC3585, and the program on the LMC. In the first case, the program is now fully completed (the 2 remaining Observation Blocks were successfully executed). In the second case, template fields in M67 were observed in the 2 instrument settings used for the science-targets. In the case of LMC, the Observation Block for which the UVES-fibre spectra were lost - on the very first night of the SV run - has now been repeated.     the new (raw+calibration) Data Packages are now available (May 1, 2003).

Night by Night reports are available for a detailed overview of how the execution of the FLAMES SV programs was distributed over the Dry Runs. Please keep in mind that the seeing value quoted on these reports is only indicative and it does not reflect possible variations during a given science exposure. We remind the users interested in using FLAMES SV data that the trend of the Paranal atmospheric conditions for a given night is available on-line.

FLAMES and Astrometry

Because the success of FLAMES observations strongly relies on the availability of accurate astrometry, we show below two examples of good astrometry, despite some slight quality difference. The figures below show the Field Acquisition Coherence Bundles for two different observations carried out during the Dry Runs. Please note that the OzPoz positioner is normally equipped with 4 FACB, but at the moment only 3 are mounted. The fourth one (FACB #149) will be installed at the beginning of Period 71 (check the Fibre Status information provided from the P2PP-Flames Information web page).

Examples of good/acceptable astrometry