README web version of /home/usg/OPS/MTS/readme_xml/readme_83014800

Principal Investigator Email Address

• fmillour@mpifr-bonn.mpg.de

Estimated Total Execution Time (hours, including overheads)

• 10.5

General Description

• This program aims at resolving close binaries among the given WR stars
   sample to confirm binarity and potentially determine the distance of the systems.
   As a secondary goal, we want to resolve the circumstellar wind for the closest and
   brightest one: WR79a, and even maybe for other stars of the sample. The initial
   proposal included WR43a and WR43b, which we think are too difficult given the C
   priority that the OPC gave to this project. Therefore, as WR79a is our first priority
   target, we switched the observing time to this star in order to repeat the observations
   3 times with different hour angles (if possible).
  
  Since most of the stars of our sample are very close to not be resolved at all in
   the continuum, we request for "differential" accuracy, i.e. the absolute level of
   visibility is not important to calibrate. Therefore we ask for relatively long integration
   times of 0.5s (or larger if the conditions permit it) with FINITO, given that it
   will work most of the time in coherencing mode.
  
  The baselines UT1-3-4 were selected in the OBs, but observations with UT1-2-4 would
   also be fine.
  
  Our priorities are:
  1st: execute the WR79a OBs to potentially resolve the stellar wind in the emission
   lines. If possible it would be the best to repeat the three OBs during the same
   observing night.
  2nd: execute the other OBs with the different targets to measure binaries. Among
   them, the priorities are decreasing with increasing K-band magnitude (in decreasing
   order for priorities: WR78, WR22, WR25, WR105, WR24 and WR94). Again, observing
   these different targets during the same observing nights would be a plus but is
   not mandatory.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• No critical observing constraints

Time-Critical Aspects

• No time critical aspect. However, we would better like to have the three
   WR79a observations made during the same night

Special Execution Requirements

• We selected UT1-3-4 in the OBs, but observing with UT1-2-4 is also fine
   for that program.

Special Calibration Information

• no special calibration

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 ?

• 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

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