README web version of /home/usg/OPS/MTS/readme_xml/readme_78070100

Principal Investigator Email Address

```
papade@astro.physik.uni-goettingen.de
```

Estimated Total Execution Time (hours, including overheads)

```
31.93 hours
```

General Description

The main goal of this project is to put firm constraints on the primordial
He abundance (Yp) by precisely deriving the Yp vs. dY/dZ slope using a 
large sample of very metal deficient emission line galaxies. 
Additionally, we wish to study the spectral energy distribution of our sample galaxies
around the Balmer discontinuity and look for high-ionization emission lines in their
 
blue spectral range. 
Therefore it is important for this project to observe all targets 
at low airmass (<1.3) or with the slit oriented along the parallactic angle.

This project can be executed at moderate seeing conditions (fwhm < 1.2) it requires,
however, clear sky.

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

clear, seeing < 1.2 arcsec, moon angular distance > 90 deg

Time-Critical Aspects

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none
```

Special Execution Requirements

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Special Calibration Information

We assume that one spectrophotometric standard is observed routinely by
 ESO
as part of the VLT Calibration Plan (CP).

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 ?

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

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 have prepared your finding charts with tools other than FIMS, do they comply with the specifications on the FORS1 Phase 2 web page ?

Last creation of page: Tue Oct 6 15:40:16 2009
If you have comments, please contact usd-help@eso.org