README web version of /home/usg/OPS/MTS/readme_xml/readme_83024200

Principal Investigator Email Address

• kfb@phys.au.dk

Estimated Total Execution Time (hours, including overheads)

• 11

General Description

• This is observations of the detached eclipsing binary s986 in the open
   cluster M67. The aim is to optain CRIRES spectra in order to derive radial velocities
   of the components and through them the masses. Combining these with radii from other
   observations, this will be used to constrain diffusion and the solar abundances.

Waiver Requests

• A Waiver was submitted and approved for OBs longer than one hour and using
   a free wavelength setting.

Critical Observing Condition Constraints

• Note that the observations are to be started at the very beginning of
   the night in order to be completed before the airmass gets too high. Also note that
   for observations in May the airmass constraint may have to be ignored for any observations
   to be done.

Time-Critical Aspects

• The programme has time constraints to avoid observing the detached eclipsing
   binary close to the moon, close to time of eclipses, and when the radial velocity
   of the secondary star is close to the "radial velocity" of telluric lines. Observations
   are to be executed on 4 of the possible observing UT dates (at start of night) given
   in the following list. Most of these dates are also given in the 'time intervals'
   section of the individual OBs, but note that there was not room for all dates. Note
   that these dates are the only ones available in P83. We therefore also include a
   few dates in March, which you can use just in case the queues from P82 are empty.
  
  Possible UT observing dates at start of night in P83:
  
  2009-04-06
  2009-04-07
  2009-04-08
  2009-04-09
  2009-04-12
  2009-04-16
  2009-04-17
  2009-04-18
  2009-04-19
  2009-04-23
  2009-04-26
  2009-04-27
  2009-04-28
  2009-05-05
  2009-05-06
  2009-05-07
  2009-05-08
  
  Possible UT observing dates at start of night in March:
  
  2009-03-16
  2009-03-17
  2009-03-18
  2009-03-19
  2009-03-26
  2009-03-27
  2009-03-28
  2009-03-29
  2009-03-31

Special Execution Requirements

• We have verified from existing observations that no telluric standard
   stars are needed, and therefore no telluric OBs are included.

Special Calibration Information

• ---(Empty)---

ToO Information

• ---(Empty)---

ToO Activators List

• ---(Empty)---

Do the README file and the instrument comments of the telluric stars
 OBs include the required S/N/pixel of the spectrum of the telluric star, its spectral
 type and allowed spectral range?

• N/A

Do any OBs include wavelength or flatfield calibrations?

• YES

If you are observing Moving Targets, have you attached suitable ephemeris
 files to your OBs?

• N/A

If the slit viewer guide star is different from the target, are the RA
 and DEC offsets accurate to within 0.05 arcsec and do they take into account the
 relative proper motion between the two objects?

• N/A

If you have preferences which OBs should be executed first for objects
 at similar RA, did you make use of the User Priority field in the OBs?

• N/A