README web version of /home/usg/OPS/MTS/readme_xml/readme_77006000

Principal Investigator Email Address

```
tboeker@rssd.esa.int
```

Estimated Total Execution Time (hours, including overheads)

```
5
```

General Description

We will use VISIR for N-band imaging and low-resolution spectroscopy 
of the AGN in NGC 4418. The target is the brightest MIR source in the 
VISIR FOV. With an expected flux of ca. 200 mJy (within 4 arcsec), it
should be readily apparent even in short acquisition images.

The imaging part of our observations (which has the highest priority)
is peformed with the standard PARALLEL chop/nod technique, with the 
chop/nod performed in E-W direction.

The spectrsoscopy part is split up in two identical OBs, each covering
the entire N-band via four different gratings. Again, chopping/nodding
is done in the same direction, keeping the target within the slit. The
slit should be oriented in E-W direction on the sky.

Waiver Requests

A waiver request was granted to allow the spectroscopic OBs to exceed
the maximum duration limit ion order to reduce the overheads associated
with the target acquisition.

Critical Observing Condition Constraints

In order to achieve a spatial resolution at the VLT diffraction limit,
we require an optical seeing of 0.8" or better.

Time-Critical Aspects

```
n/a
```

Special Execution Requirements

```
n/a
```

Special Calibration Information

We will rely on the routine observations of spectro-photometric standard
 stars.

ToO Information

```
n/a
```

ToO Activators List

```
n/a
```

Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

```
n/a
```

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 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 ?

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 15:40:12 2009
If you have comments, please contact usd-help@eso.org