README web version of /home/usg/OPS/MTS/readme_xml/readme_75085003

Principal Investigator Email Address

• Emmanuel.Difolco@obspm.fr

Estimated Total Execution Time (hours, including overheads)

• 5

General Description

• This run consists in observing two bright Vega-like stars (alfpsa=hd216956
   and zetlep=hd38678) with the VLTI/MIDI instrument in the PRISM mode and with the
   UT3-UT4 baseline. High precision measurements are expected. Therefore, sequential
   observations of calibrators and scientific target are preferred.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• Sky transparency must be CLEAR.

Time-Critical Aspects

• No time constraint.

Special Execution Requirements

• Currently, one calibrated visibility point should be obtained per hour
   on a regular basis. The calibrator star acquisition is at least as important as
   the scientific target for this program. Therefore, it is preferable -if operations
   proceed well- to use two different calibrators instead of one.
  
  For alpha PsA (=alfpsa), the following sequential observing sequence should be preferred
   during the allocated 2 hours :
  (CalA - Sci-1) - (CalB - Sci-2), where calA=hd218594 & CalB=hd213009
  
  For zeta Lep (=zetlep), the following sequential observing sequence should be preferred
   during the allocated 3 hours :
  (CalA - Sci-1) - (CalB - Sci-2) - (CalA - Sci-3), where calA=hd36673 & calB=hd36079
  if it not feasible, the following is preferred:
  1-(CalA - Sci-1) - (CalB - Sci-2)
  2-(CalA - Sci-3)
  
  Please try to ensure (at least partly) the sequential execution of the OBs related
   to the same target.

Special Calibration Information

• The two following calibrator stars are not is the CalVin database :
  
  hd213009 (=cal2 for alfpsa)
  V=3.97
  N=1.8
  G7III
  Diam UD= 2.07 +/- 0.09 mas
  from IR flux (IRAS meas.)
  
  hd36673 (=cal1 for zetlep)
  V=2.597
  N=2
  F0Ib
  Diam UD= 1.54 +/- 0.01 mas
  from IR flux (IRAS meas.)

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 ?

• 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 indicate for each science star OB the corresponding calibrator
 star OB (and vice versa) in the 'User Comments' field ?

• 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 ?

• YES