README web version of /home/usg/OPS/MTS/readme_xml/readme_77059116

Principal Investigator Email Address

```
jens@astro.ku.dk
```

Estimated Total Execution Time (hours, including overheads)

```
13h
```

General Description

Pre-imaging OBs of selected GRB fields centered on the Swift XRT (Butler2006)
 positions. Some fields have been offset in order to avoid objects brighter than
 K~11. The OB names of these fields contain the word "offset".

Some of our targets pass closer than 8 degrees from Zenith and we have noted this
 in the corresponding OBs "User Comments" field. These OBs should not be observed
 at hour angles less than +/- 30min (ie. the 1h OBs should normally be started at
 least 1.5h before meridian passage, or at least 0.5h after meridian passage). The
 targets in question are:

PRE GRB070419B Ks 3600
PRE GRB070611 Ks 3600
PRE GRB070621 Ks 3600
PRE GRB070721A Ks 3600

Also note that some OBs have Time-Interval constraints associated to them, this
 is due to the fact that we require all observations of GRB fields to occur at least
 2 months after the event (GRB 070611,070621, 070721A, 070721B, 070802)

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

```
None
```

Time-Critical Aspects

Some OBs have Time-Interval constraint set to ensure that those targets
 are observed a minimum of 2 months after the GRB event. The OBs are: GRB 070611,070621,
 070721A, 070721B, 070802

Special Execution Requirements

Please note that four of our targets are located such that they pass near
 Zenith. Due to the faster movement of the rotater near Zenith a poorer sky estimation
 results. These OBs should consequently NOT be observed at Hour Angles less than
 +- 0.5h. This means they should either be started at least 1.5h before meridian
 passage, or 0.5h after meridian passage. See General description and OB comments
 for more info.

Special Calibration Information

```
None
```

ToO Information

---(Empty)---

ToO Activators List

---(Empty)---

Is this a Pre-imaging run ?

```
true
```

Pre-imaging Requirements

```
All OBs are PRE-IMAGING.
```

Source(s) of Pre-imaging

```
ISAAC
```

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 ?

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 you submitted OBs for standard stars, did you use the provided StandardStar templates ?

```
N/A
```

If you are using a specific offset pattern or position angle, did you check carefully the definition in the manual ?

```
N/A
```

If you are doing spectroscopy, did you draw the slit on the Finding Charts ?

```
N/A
```

Did you enter the magnitude of the brightest star in the field-of-view in the 'Instrument Comments' field of each OB ?

If you use the MoveToPixel acquisition, have you given clear instructions on the FC and in the OB comment section as to how the field should be centered ?

```
N/A
```

Last creation of page: Tue Oct 6 15:40:13 2009
If you have comments, please contact usd-help@eso.org