README web version of /home/usg/OPS/MTS/readme_xml/readme_75060000

Principal Investigator Email Address

```
cayrel@obspm.fr
```

Estimated Total Execution Time (hours, including overheads)

```
20 hours
```

General Description

The halo turnoff star HD 74000 is located in the theoretical HR
diagramme almost superimposed with HD 84937 in which 6Li has been
detected by several groups. HD 74000 has the same metallicity and a 
higher content in Be. It is {a priori} a more favourable case for a
6Li measurement. We propose to perform the observation with HARPS
for several reasons: (i) the star is bright enough to be observed with a 
4m telescope (ii) HARPS has a higher spectral resolution than UVES,
useful for separating lines with a 0.16 A shift (iii) the great
accuracy of the wave length calibration is useful for taking into account
the blue shifts induced by the convective motion which are of the order 
of a few mA, and alter the profile and the position of spectral lines

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

THN - seeing <1.2"
The goal is to obtain S/N>100 for one exposure.

Time-Critical Aspects

```
None
```

Special Execution Requirements

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Special Calibration Information

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ToO Information

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ToO Activators List

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Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

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Source(s) of Pre-imaging

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Pre-imaging sources not listed above

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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 ?

```
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?

```
N/A
```

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

```
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
```

Last creation of page: Tue Oct 6 15:40:08 2009
If you have comments, please contact usd-help@eso.org