README web version of /home/usg/OPS/MTS/readme_xml/readme_81081700

Principal Investigator Email Address

• luca.sbordone@obspm.fr

Estimated Total Execution Time (hours, including overheads)

• 13h

General Description

• Five cold (Teff~5000) metal poor subdwarf stars are observed at high S/N,
   high resolution to measure Mg isotopic split in the MgH band near 513 nm. Typical
   requrement for final S/N (on coadded spectra) varies between 150 and 350 depending
   on the star characteristics.
  All the stars are nearby halo dwarfs, thus show high proper motions. Since finding
   charts (from DSS2 plates) can be more than 15 years old, many stars may have significantly
   moved with respect to nearby sources. Coordinates at 2000 equinox and epoch are
   provided as well as proper motions, extracted from Simbad. Proper motions appear
   to be accurate, comparing DSS1 position against 2MASS.
  This program is a re-edition of 079.D-0734 which went almost unexecuted due to bad
   weather conditions.

Waiver Requests

• Waiver request 081.D-0817A.01 submitted on 2008/02/12, approved on 2008/02/13
   to execute OBs of total duration longer than 1 h

Critical Observing Condition Constraints

• None. In the execution template it has to be indicated a slit width even
   if image slicer is used, as in our case. We put a 1" slit as a dummy value.

Time-Critical Aspects

• LHS2365 is best observed at the beginning of the period (April). G 30-31
   is best observed at the end of the period (September).

Special Execution Requirements

• The full execution of the OBs relative to highest priority targets (LHS
   2365, LHS 343) should be preferred with respect to partial execution for all the
   targets.

Special Calibration Information

• ---(Empty)---

ToO Information

• ---(Empty)---

ToO Activators List

• ---(Empty)---

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

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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