README web version of /home/usg/OPS/MTS/readme_xml/readme_81501500

Principal Investigator Email Address

```
N.Christlieb@lsw.uni-heidelberg.de
```

Estimated Total Execution Time (hours, including overheads)

```
03:26:20
```

General Description

UVES spectra shall be obtained for HE1506-0113, a star which is suspected
 to have 
[Fe/H] < -4.0, judged from medium-resolution spectroscopy. The scientific aim
 is 
to carry out a first abundance analysis of the star, which requires a signal-to-noise
ratio of 75 per rebinned pixel at 400nm.

In order to stay below the maximum execution time of 1h per OB, four OBs with an
exposure time of 2500s each were created. The BLUE390 and RED580 standard settings
 
and a 1'' slit in both arms shall be used. We use a 1x1 pixel binning of both 
CCDs because we are not readout-noise limited; the reduced spectra will be 
rebinned by a factor of 2 in order to increase the S/N.

For avoiding slit losses due to atmospheric differential refraction, the slit is
 put
to the parallactic angle, and the derotator mode is set to "ELEV" in the OBs.

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

```
None
```

Time-Critical Aspects

The target is difficult to observe after August.

Special Execution Requirements

```
None
```

Special Calibration Information

```
None
```

ToO Information

```
Not applicable
```

ToO Activators List

```
Not applicable
```

Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

```
Not applicable
```

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 ?

```
N/A
```

Have you specified the S/N ratio at given wavelength in the User Comments field of each OB?

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
```

If you need secondary guiding, are there suitable objects within 30 arcsec from your target ?

```
N/A
```

Last creation of page: Tue Oct 6 15:40:25 2009
If you have comments, please contact usd-help@eso.org