README web version of /home/usg/OPS/MTS/readme_xml/readme_84057400

Principal Investigator Email Address

```
gdb@ast.cam.ac.uk
```

Estimated Total Execution Time (hours, including overheads)

```
16.63
```

General Description

X-Shooter observations of 2 high-redshift (z > 5) QSOs.

These objects are faint (~19th-20th mag) and very red, and may require long integrations
 with the A&G camera to acquire.  10 and 15 second exposures in I band have been
 suggested.  These objects will be extremely faint blueward of ~770nm, and will contain
 no light in the UVB arm.

OBs are roughly 1 hour 11 min blocks composed of 2 nodded 1800 sec exposures.

Parallactic angle has been requested for the slit placement.  If guiding is a problem,
 however, a fixed PA at any angle may be used.

OBs are meant to be executed with alternating nod throw lengths of 3 and 4 arcseconds.
  If OBs are executed consecutively, a throw length of 3.5 arcsec and a jitter box
 of 1 arcsec may be used.

Waiver Requests

A waiver request was approved to include OBs longer than 1 hour (roughly
 1 hour 10 minutes)

WaiverID: 084.A-0574A.01

Submitted 08/04/09, Approved 08/05/09 10:42:29 by Palle Moller

Critical Observing Condition Constraints

```
Seeing < 0.8"
```

Time-Critical Aspects

```
None
```

Special Execution Requirements

```
None
```

Special Calibration Information

```
None
```

ToO Information

```
None
```

ToO Activators List

```
None
```

Do all your OBs comply with the instrument-specific requirements listed on the instrument-specific Phase 2 web page ?

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 specified the S/N ratio at given wavelength in the User Comments field of each OB?

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
```

Last creation of page: Tue Oct 6 15:40:32 2009
If you have comments, please contact usd-help@eso.org