README web version of /home/usg/OPS/MTS/readme_xml/readme_77063500

Principal Investigator Email Address

```
Jean-Claude.Bouret@oamp.fr
```

Estimated Total Execution Time (hours, including overheads)

```
09:59:36.00
```

General Description

We intend to analyse a large sample of Galactic O stars. The analysis
 will be based on
high-resolution spectra and NLTE models, and will account for NLTE metal line blanketing,
spherical extension, and stellar winds.
We will derive for each star the basic stellar parameters, apparent rotational velocities,
surface chemical composition and wind properties.
This analysis will allow us to investigate the effect of rotation on the evolution
 of massive
stars and their winds. We will obtain a map of CNO abundances across the parameter
 range of O
stars probing the efficiency of rotationally-induced mixing.
To achieve our science goals requiring to model relatively weak lines, we need a
 S/N > 200 in
the BVR bandpasses. High S/N in the near-UV is not necessary to complete our program.

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

```
N/A
```

Time-Critical Aspects

```
N/A
```

Special Execution Requirements

Becaause the sample includes both bright (V~5) and ``faint'' (V~10) stars,
 we will need some  flexibility in prioritizing the observations depending on the
 actual meteorological conditions, thus ensuring that we will meet our S/N requirements.

Special Calibration Information

```
N/A
```

ToO Information

---(Empty)---

ToO Activators List

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Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

---(Empty)---

Source(s) of Pre-imaging

---(Empty)---

Pre-imaging sources not listed above

---(Empty)---

Do all your OBs comply with the instrument-specific requirements listed on the instrument-specific Phase 2 web page ?

If this is a pre-imaging run, did you select PRE-IMAGING for the Observing Category for each Observing Template ?

```
N/A
```

Do all your finding charts comply with both the general and instrument-specific Phase 2 Web Pages ?

If you submitted OBs for standard stars, did you specify the magnitude and spectral type of all standard stars in the OBs ?

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N/A
```

Have you included OBs for any calibrations that you need but which are not part of the Calibration Plan ?

```
N/A
```

If you are observing Moving Targets, have you attached suitable ephemeris files to your OBs?

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N/A
```

If you have preferences which OBs should be executed first, did you make use of the User Priority field in the OBs ?

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N/A
```

If this is a run that requires coordinated observations with other facilities, did you give proper instructions in the Time-Critical Aspects Section ?

```
N/A
```

Did you set 'New Preset' flag in all acquisition templates to 'True'?

```
N/A
```

If you use any lamp, did you check that it should never be left on at the end of any OB?

```
N/A
```

Last creation of page: Tue Oct 6 15:40:13 2009
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