README web version of /home/usg/OPS/MTS/readme_xml/readme_83081600

Principal Investigator Email Address

```
masseron@astronomy.ohio-state.edu
```

Estimated Total Execution Time (hours, including overheads)

```
13.5h
```

General Description

We will measure phosphorus in 20 CEMP stars, the
first test of phosphorus production in metal-poor AGB stars. Models predict various
 abundances, but it is the first time that phosphorus is observed in metal-poor stars.
 There are only 8 lines present in the IR of stellar spectra (10511 10529 10581 10596
 AA)
, only the setting 1066.8 allow to cover 4 of them at once. Because Phosophorus
 lines are weak and because model predictions are uncertain, we require high S/N
 (~100) and high-resolution near-infrared spectra to ensure an accurate measurement
 of relatively faint  targets and the need for
high-resolution, large apertures are needed.

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

A signal-to-noise of ~100 is reuired in order to ensure good data quality.

Time-Critical Aspects

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No time critical
```

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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Do the README file and the instrument comments of the telluric stars OBs include the required S/N/pixel of the spectrum of the telluric star, its spectral type and allowed spectral range?

Do any OBs include wavelength or flatfield calibrations?

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

```
N/A
```

If the slit viewer guide star is different from the target, are the RA and DEC offsets accurate to within 0.05 arcsec and do they take into account the relative proper motion between the two objects?

```
N/A
```

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

Last creation of page: Tue Oct 6 15:40:30 2009
If you have comments, please contact usd-help@eso.org