README web version of /home/usg/OPS/MTS/readme_xml/readme_80049300

Principal Investigator Email Address

```
angeles.diaz@uam.es
```

Estimated Total Execution Time (hours, including overheads)

```
06:58:00.000
```

General Description

Our aim is to observe for a sample of Blue Compact Dwarf Galaxies the
 [SIV] 10.51 $\mu$m emission line. The sample that we propose here is comprised of
 HII galaxies from the SDSS catalogue. The objects have already been observed in
 the optical and far red  spectral range. The use of VISIR to get spectral observations
 in the mid-IR spectral range will provide valuable information about the ionisation
 structure of HII galaxies and will allow the empirical derivation of the ionization
 correction factor for  sulphur, imperative in order to derive total S abundances
 for these objects, if the model predicted Ar$^{2+}$/Ar$^{3+}$ vs  S$^{2+}$/S$^{3+}$
 is supported by observational data.

There are no N-band images for the sample objects. The attached finding charts have
 been made on Ks-band images from 2MASS. The object is at the center of the f. o.
 v. of the finding chart and corresponds to the coordinates written on the finding
 chart. The finding charts have a size of 40" by 40" and the length of the slit has
 been taken to be 32".5.

For target J115237 we intend to observe a bright emission knot in the galaxy, therefore
 the slit is offset ~3" to the west from the brightest object.

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

Since we need absolute line fluxes, photometric condictions are required

Time-Critical Aspects

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No time critical aspects
```

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
```

If the provided finding chart is at a different wavelength than the observations, did you clearly describe in the README file how to identify the target?

Did you specify a guide star brighter than V=12mag within a field of r=5arcmin around the science target?

Last creation of page: Tue Oct 6 15:40:21 2009
If you have comments, please contact usd-help@eso.org