README web version of /home/usg/OPS/MTS/readme_xml/readme_81011500

Principal Investigator Email Address

```
arichich@eso.org
```

Estimated Total Execution Time (hours, including overheads)

```
6
```

General Description

Note: LST constraints in these OBs are not meaningful! Only for p2pp verification

We want to observe microlensing events around the time of maximum brightening to
 detect the image splitting, which
is similar to observing a binary or multiple star. We want to repeat the observations
 several times (ideally six times), 
over the same night or very few nights depending on the time evolution of the event.
 
We will provide email/web alerts (see ToO Activators).
We expect the sources to be faint, K typically 7-9, i.e. no FINITO. Exact baseline
 choice is not crucial. We do not know
in advance the expected visibility, which could be anywhere from 0 to 1 as for binary
 stars. Very low values however are
not likely since the splitting will not produce equal brightness components.
We provide two sets of OBS, one for bright (K<7) and one for faint (K7-9). Each
 set consists of one SCI and one CAL,
to be repeated up to six times.
Observations should be ideally separated in time as to provide different orientations
 of the baselines. 
They should be interspersed with calibrator observations.

When we provide the email trigger, we should know more precisely the magnitude and
 perhaps some indication of the 
visibility.

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

Ideally we would like seeing <1", but since these events are rare we
 will accept 1.2"
(the proposal had 1.4" but the Paranal technical verification recommended 1")

Time-Critical Aspects

This is a ToO, with triggers provided by email/web form (see ToO Activators)

The same OB will be used to perform several time the same observation at different
 times of the night(s)

Note that LST constraints in this OBs are not meaningful (only for p2pp verification)

Special Execution Requirements

---(Empty)---

Special Calibration Information

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ToO Information

Triggers to be provided by email/web form (see ToO Activators)

ToO Activators List

A. Richichi arichich@eso.org
M. Schoeller mschoell@eso.org
N. Rattenbury nicholas.rattenbury@manchester.ac.uk

Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

---(Empty)---

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 ?

```
N/A
```

If you submitted OBs for standard stars, did you specify the magnitude and spectral type of all standard stars in the OBs ?

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
```

Did you indicate for each science star OB the corresponding calibrator star OB (and vice versa) in the 'Instrument Comments' field ?

Did you check that your chosen calibrator is bright enough for the instrument mode used ?

If you use calibrator stars which are not in the CalVin database, did you specify their characteristics in the README file and in the OBs ?

```
N/A
```

Do you use the same DIT for pairs of science target and associated calibrator?

Are the magnitudes of science target and calibrator within +/- 1 mag ?

Did you verify that your coordinates are as accurate as possible (2Mass coordinates recommended) and that they include proper motions if available ?

```
N/A
```

Did you specify the LST range of the calibrators such that they cover the range from 30 min before the start of the LST range of the science target to 30 min after the end of the LST range of the science target ?

```
N/A
```

Last creation of page: Tue Oct 6 15:40:23 2009
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