README web version of /home/usg/OPS/MTS/readme_xml/readme_81009100

Principal Investigator Email Address

• kbrogaar@eso.org

Estimated Total Execution Time (hours, including overheads)

• 30 hours

General Description

• This is UVES observations of two unresolved detached eclipsing binaries
   in NGC6791. The goal is to obtain precision radial velocities of each component
   at epochs spread equally over the orbitS. When used in combination with lightcurves
   of the eclipses this will give precision masses and radii of the components. And
   these will be used to constrain stellar models.

Waiver Requests

• A Waiver Request for OBs of 1.5 hours was accepted.

Critical Observing Condition Constraints

• The airmass should not be higher than 2.4 at any time.

Time-Critical Aspects

• Each OB should be executed only once.
  The possible observing dates are given below and in the 'time intervals' of each
   target. On nights where both targets are observable, we have used the 'user priority
   field' since there is only time to observe one target per night because NGC6791
   is always at high airmass. 
  
  The PHASE in the below list is the last digit in the OB. An example: PHASE 1 for
   star6840 corresponds to the OB NGC6791_6840_1. A '-' means that this taget should
   not be taken on that night.
  
  Date at start | PHASE for | PHASE for
  of the night  | star6840  | star12390
  ---------------------------------------
  Oct  1        |     -     |     1
  Oct  2        |     -     |     1
  Oct  4        |     -     |     1
  Oct  6        |     -     |     1
  Oct  9        |     -     |     1
  Oct 11        |     -     |     1
  Oct 14        |     -     |     1
   
  Note that each target has to be observed at many different orbital phases and is
   scheduled accordingly. This means that depending on which nights the individual
   observations are carried out, there may be dates in the above list, where no OB
   can be done, if both targets have already been observed at the phases corresponding
   to that date.
  
  Note also that because of the declination of NGC6791, there is only a small time
   window each night, where the targets can be observed. This window will grow smaller
   and smaller, and in October the airmass constraint will have to be disregarded.

Special Execution Requirements

• Each OB is longer than 1 hour, for which a waiver request was accepted.

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 ?

• N/A

Have you specified the S/N ratio at given wavelength in the User Comments
 field of each OB?

• 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

If you need secondary guiding, are there suitable objects within 30 arcsec
 from your target ?

• N/A