README web version of /home/usg/OPS/MTS/readme_xml/readme_75037701

Principal Investigator Email Address

```
georges.meylan@epfl.ch
```

Estimated Total Execution Time (hours, including overheads)

```
15 h
```

General Description

Goal: measuring the redshift of the lensing galaxy in lensed quasars.
 We will use deconvolution techniques in order to remove the spectrum of the quasar
 images, using PSF stars. Their centering is as important as the centering of the
 quasar itself.

The centering of the quasar is optimized to have the deconvolution procedure to
 work well. The centering in the zoomed finding chart IS the correct one. Use the
 PSF stars to check that the mask is well aligned, not the quasar itself, because
 it has a complex shape, in many cases.

There are 3 OBs per object, each one with 2 times 1400 seconds exposures = 6 x 1400
 sec. Some objects have only 5 such exposures.
The minimum useful data to successfully carry out the project is with 2 executed
OBs per object = 4 x 1400 sec. 

Note: Please check that the width of all FORS1 slits is the same. We had in the
 past some data with slits of different width although this was not specified in
 the masks.

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

```
None
```

Time-Critical Aspects

```
None
```

Special Execution Requirements

```
None
```

Special Calibration Information

```
None
```

ToO Information

```
Not a ToO
```

ToO Activators List

```
Not ToO
```

Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

```
This is not a preimaging run.
```

Source(s) of Pre-imaging

```
FORS1 after 03/03
```

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 ?

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 15:40:07 2009
If you have comments, please contact usd-help@eso.org