README web version of /home/usg/OPS/MTS/readme_xml/readme_79086101

Principal Investigator Email Address

• augereau@obs.ujf-grenoble.fr

Estimated Total Execution Time (hours, including overheads)

• 4.5

General Description

• The goal of the proposal is to resolve the inner edge of the disks around
   three young solar-type stars using the VLTI/AMBER instrument (UT1-UT3-UT4 configuration).
   This program has been considered as challenging and will serve to demonstrate the
   feasibility of such observations with the VLTI. Excellent atmospheric conditions
   are required: seeing ?0.8" and CLEAR sky are essential.
  
  The full accepted programme (9h) consists of 2 runs :
  - run A, ranked A: (3 stars + 3 calibrators) x 0.75 hour per star = 4.5h
  - run B, ranked B: (3 same stars and same calibrators) x 0.75h = 4.5h
  
  For each of the three science sources, there are two OBs: one OB for the science
   source and one OB for the calibrator. This results in a total of 6 OBs for run A
   and 6 OBs for run B.
  
  The calibrator should always be observed BEFORE the science object, in order to
   detect and correct for any possible problems with AMBER and/or the VLTI.
  
  Obviously, the 3 science objects do not need to be observed during the same night.
  
  The observations will be done in the low resolution spectral configuration (LR-JHK
   mode). IRIS guiding must be used.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• As the program was considered as a feasibility study the seeing must be
   ?0.8" and the sky quality must be CLEAR.
  
  Our objects are faint, hence IRIS guiding is required (as indicated in our phase
   I proposal, although we understand that it is now used systematically, Sec 6, page
   11 of the AMBER user manual, issue 79.1, dated 09/12/2006).
  
  For our three science targets we specified in the OBs a Local Sideral Time window
   (15:00 <-> 18:00). This range was calculated using ASPRO (http://www.mariotti.fr).
   This observing window ensures the UV coverage will be satisfactory, because the
   source is higher than 30 degrees in the sky.

Time-Critical Aspects

• N/A

Special Execution Requirements

• N/A

Special Calibration Information

• For each science source we choose one calibrator. These were chosen according
   to multiple criteria (K-band magnitude, spectral type, V-band magnitude, and angular
   separation). We also checked that they were all single stars (no binaries, no resolved
   sources, ...). Their theoretical squared visibilities were calculated using the
   SearchCal software (http://www.mariotti.fr) and were always greater than 0.99.
  
  Please find below the list of calibrators used:
  
  science object RNO 90   <->  calibrator HD 151450 (V mag=7.414, K mag=6.099,
   SpT=G2)
  science object DoAr 24E <->  calibrator HD 146997 (V mag=8.344, K mag=6.871,
   SpT=G5)
  science object SR 21    <->  calibrator HD 146997 (V mag=8.344, K mag=6.871,
   SpT=G5)
  
  Note that one calibrator is in common to two science objects, hence two OBs with
   the same calibrator.

ToO Information

• N/A

ToO Activators List

• N/A

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• N/A

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 ?

• YES