README web version of /home/usg/OPS/MTS/readme_xml/readme_80056200

Principal Investigator Email Address

• dreizler@astro.physik.uni-goettingen.de

Estimated Total Execution Time (hours, including overheads)

• 3:59

General Description

• The aim of the proposal is to obtain spectra from a background star near
   Fomalhaut (19 arcsec distance). Due to the proper motion of Fomalhaut the background
   star will pass behind the protoplanetary disk of Fomalhaut within the next decade
   and therefore allow for an examination of the disk structure.
  
  While the star is visible on HST images in Coronographic mode, the IFU mode of VIMOS
   will allow for a careful background subtraction of the light contribution of Fomalhaut.
   We estimate about 18mag/arcsec^2 as contribution from Fomalhaut.
  
  From HST an image (July 2006) we calculated the position of the target star (i.e.
   center of FOV is 19 arcsec away from Fomalhaut), which can be acquired blindly due
   the FOV of 13 x 13 arcsec of the IFU in high spatial resolution and shutter mask.
   
  
  We choose a rotation on the sky of 45 deg in order to avoid to point the diagonal
   of the FOV towards Fomalhaut.
  
  The HR-blue/red observations are meant to provide spectral type of the background
   star, the repeated MR observations shall check for intrinsic variablity of the target.
   An execution in consecutive nights is favourable but not mandatory.
  
  According to the manual, the specification of a guidestar is not necessary for the
   IFU mode.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• A good seeing (<0.8 arcsec) is required for a better detection of the
   target star within the background of Fomalhaut.
  
  Photometric conditions provide the basis for variability investigations.

Time-Critical Aspects

• MR observations in different nights, preferably in consecutive nights.

Special Execution Requirements

• From an HST image (July 2006) we determined the position of the target
   star, which are the target coordinates in the OBs. This is 19 arcsec away from Fomalhaut's
   present position.  
  
  Please note that the finding chart is 15 x 15 arcmin, present position and IFU filed
   is marked on the finding chart
  
  With the pointing accuracy of VLT a blind pointing should be sufficient.

Special Calibration Information

• Following the recommendation in the manual we ask for wavelength and flatfield
   calibration during the night.

ToO Information

• ---(Empty)---

ToO Activators List

• ---(Empty)---

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• ---(Empty)---

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

• YES

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 ?

• YES

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 ?

• YES

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 ?

• YES

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 specify suitable guide stars for all your OBs using Guidecam
 ?

• N/A

Did you check that the chosen guide stars are suitable for all the offset
 positions and that they do not produce unacceptable vignetting of the field of view
 ?

• N/A