README web version of /home/usg/OPS/MTS/readme_xml/readme_75044700

Principal Investigator Email Address

```
herve.beust@obs.ujf-grenoble.fr
```

Estimated Total Execution Time (hours, including overheads)

```
4.5
```

General Description

The purpose of these observations is 1) to confirm the companionship and
 to characterize the possible fourth component to the spectroscopic multiple systen
 TY CrA (B8, K = 6.7) and 2) to investigate for the presence of dust in its close
 CS environment. The companion was detected during the NACO 3rd commissionning at
 a separation of 0.3" and PA = 188.5deg. The contrasts are delta_nb1p26 = 3.5 and
 delta_nb2p17 = 2.8. We then would like to:

1) CLASSICAL AUTOJITTER IMAGING
To obtain classical imaging within the NB filters NB1.26, NB1.64 and NB2.17 with
 the S13 camera and NB3.74 with L27 camera. The reference star SAO210858 must be
 observe JUST AFTER for good deconvolution

2) SPECTROSCOPY
To obtain simulatnaeous spectroscopic observations of both TY CrA and the 4th possible
 component using the modes SJ-S54 and SHK-S54 with the 86mas slit.
!!! BOTH OBJECTS MUST BE POSITIONNED INTO THE SLIT DURING THE ACQUISITION. ADJUST
 PA IF NEEDED !!!

3) CORONO
Center the primary behind the mask.
The PSF star must be observed just after to have the spikes at the same position.
 


!!!!! PLEASE ADJUST THE DIT TO NOT GO OVER THE 1% LINEARITY LIMIT FOR EACH MODE%

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

```
none
```

Time-Critical Aspects

```
none
```

Special Execution Requirements

PSF reference for classical imaging and coronography must be observed
 just after the science OB.

Special Calibration Information

ESO telluric standard for spectroscopic observations

ToO Information

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none
```

ToO Activators List

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none
```

Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

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none
```

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 ?

```
N/A
```

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 PSF reference star OBs, do the names of those OBs begin with PSF_ ?

If there are Finding Charts attached to your OBs, is the field-of-view of at least one of these charts 2' x 2' (with clearly labelled field orientation) ?

Have you clearly marked and labelled your wavefront reference objects R1, R2, R3, ... (as specified in the NAOS Preparation Software) on your Finding Charts ?

Have you specified the magnitude of the brightest object in the field-of-view for each OB ?

Are there objects in any of your fields (including standard stars) which are brighter than the limits specified in the User Manual and on NACO web Pages ?

If the previous answer is yes, have you given a list of OBs and a justification for the brightness limit violation in the general description field ?

```
N/A
```

Last creation of page: Tue Oct 6 15:40:07 2009
If you have comments, please contact usd-help@eso.org