README web version of /home/usg/OPS/MTS/readme_xml/readme_82065700

Principal Investigator Email Address

• Myriam.Benisty@obs.ujf-grenoble.fr

Estimated Total Execution Time (hours, including overheads)

• 1.5

General Description

• The goal of the program is to spatially resolve and study the geometry
   of the emitting gas located in the closest AUs of HAeBe stars where planets are
   supposed to form. 
  We propose to observe the gas in a strong emission line (Brackett Gamma, 2.165microns),
   that is for this target at least 30% more luminous than the continuum.
  To this goal, we propose observations on MWC158, a B9 star, with AMBER in its medium
   resolution mode, with FINITO.
  Such observations are of very high importance to constain planet formation models,
   and *only* AMBER/VLTI can achieve them. 
  
  Observations should be preferably carried with the D0H0G1, but the E0G0H0 triplet
   can also be chosen in case it serves the service queue, at the end of the period
   where the target can be observed.
  Besides, in order to have the OBs verified and checked OK by the system, I had to
   put 0.6" as seeing constaints, but I do think that the observations could be carried
   until 0.8" (because I already obtained data on a H=5.5, K=4.2 (fainter) target in
   MR-K with FINITO on the ATs, with seeing from 0.6" to 0.8").
  
  1.5 hours were obtained for this program, and this corresponds to more than 1 calibrated
   point. Therefore, I suggest to integrate *longer* on the target, ie to do a sequence
   such as: science-science-calibrator (there are 2 templates in the science OB). In
   fact, my experience in visitor mode - in which we did a H=5.5 target in medium resolution
   with FINITO - showed that it is necessary to integrate as many target files as possible,
   in order to get an unambiguous signal of V2 within the Brackett Gamma line.
  
  These observations are at the limit of FINITO official performances, but can be
   achieved with it, in good conditions (seeing <=0.8" and good coherence time).
   
  The fringes are expected to be of high contrasts (even more with the E0-G0-H0 triplet)
   but as the target has never been observed, I could not give a very specific value.
  
  If the tracking by FINITO seems very OK, then, the astronomer can integrate up to
   2seconds, increasing the SNR in the Brackett Gamma line. But this choice will depend
   on the conditions. To be conservative, I put 1second in the OBs.
  
  The calibrator was chosen with CalVin and has a 0.87mas+-0.01mas diameter.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• No critical observing constraints.

Time-Critical Aspects

• No time-critical aspects.

Special Execution Requirements

• ---(Empty)---

Special Calibration Information

• ---(Empty)---

ToO Information

• ---(Empty)---

ToO Activators List

• ---(Empty)---

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 ?

• 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 ?

• YES

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

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

• YES

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

• YES

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?

• YES

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

• YES

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

• YES

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 ?

• YES