README web version of /home/usg/OPS/MTS/readme_xml/readme_78026600

Principal Investigator Email Address

• etatulli@arcetri.astro.it

Estimated Total Execution Time (hours, including overheads)

• 1.5 hours (0.75 hours for SCI and 0.75 hours for CAL)

General Description

• This is a simple run regarding interferometric observations in the K Band
   with medium spectral resolution mode around the BrGamma emission line, using the
   triplet UT1-UT2-UT4.
  Fringes need to be recorded for both the science target (HD98922) and the calibrator,
   in order to insure absolute calibration of the visibilities.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• Given the K-magnitude of the souces, sky should be CLEAR with good seeing
   (<= 0.8")

Time-Critical Aspects

• No time critical aspects

Special Execution Requirements

• Given the low correlated magnitude of the science object for the longest
   baselines (UT2-UT4, UT1-UT4), here are some observational strategies to follow in
   order to optimize fringe search:
  
  a) finding the fringes for the shortest baseline first, which should be the easiest.
   Then searching the OPD delay for the middle baseline (the third one being automatically
   set 
  by the first two). 
  
  b) if possible and if a) did not work, swiching to low spectral resolution mode
   for the fringe search where the correlated flux should be more than enough for all
   the baselines. Then switching back to mid res, without performing a new OPD search
   (fringes must be there even if not seen anymore) and recording the data. This requires
   to perform a P2VM recording AFTER the observation (to take into account the spectral
   mode switch which might have changed the instrumental configuration of AMBER)
  
  c) if a) and/or b) did not work, trying again a) then b) with an higher integration
   time (100ms, for the fringe searchm then switching to 25ms without moving the OPDs
   to record fringes)
  
  IMPORTANT: EVEN IF FRINGE SEARCH HAS NOT BEEN SUCCESSFUL FOR THE BASELINES UT2-UT4
   and UT1-UT4, IS IS OF SCIENTIFIC INTEREST TO RECORD FRINGES ON THE SHORTEST BASELINE
   UT1-UT2 IN ANY CASE

Special Calibration Information

• It is of major importance to have measured fringes on a calibrator in
   order to compute a absolute calibration of the science visibility.  As a consequence,
   2 calibrators observing block have been provided in case the first and priority
   one cannot be performed for any reasons.
  
  The priority CAL observing block is CAL_HD96068:
  the calibrator is the star HD96068, of spectral type G8III, K=4.1 (V=6.5) with coordinates
   
  11 04 02.91 -54 11 52.0
  The estimater diameter is 0.753 mas +/- 0.052 (ASPRO tool)
  
  The secondary CAL observing block (to use only if first one did not work) is CAL_HD95509:
  the calibrator is the star HD95509 of spectral type K3III, K=3.7 (V=6.5) with coordinates
   
  11 00 36.25 -53 06 42.6
  The estimater diameter is 0.970 mas +/- 0.067 (ASPRO tool)

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 ?

• 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 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