README web version of /home/usg/OPS/MTS/readme_xml/readme_82036300

Principal Investigator Email Address

• lmonaco@eso.org

Estimated Total Execution Time (hours, including overheads)

• 24hr

General Description

• This is a simple survey project aimed at obtain detailed chemical abundances
   for a sample of 26 stars belonging to the leading tail of the Sagittarius dwarf
   Spheroidal galaxy tidal streams. 
  
  26 OBs were submitted, one per target. The OBs are identical each other but for
   the coordinates and the exposure times. Exposure time is ~30min per target brighter
   than V=16.6 and ~1hr for target fainter than that. Targets have K magnitudes in
   the range 11.6-12.8. There are no measured V magnitudes for our targets. However,
   we estimate the V magnitudes to be in the range V=15.6-17.1. K and estimated V magnitudes
   are given in the OBs "user comments" field.
  
  There are no particular priorities among the targets and observations are not critically
   affected by the observing condition as long as the target S/N is obtained (S/N~>25@600nm).

Waiver Requests

• Three waiver request were approved:
  
  1- we asked to observe a different target list. We realized that
  a few targets were to be preferred (due to their color, reddening and
  magnitudes) to others and that a few targets were to be excluded due to
  the presence of one or few close/bright nearby stars.
  
  2- we asked to use the following
  UVES instrument setup: DIC2 437+760 (instead of DIC-1 390+580).
  Our targets have temperatures below 4000K. As such their spectra might show TiO
   bands which might complicate the chemical abundance analysis. However, TiO bands
   are negligible in large part of the red range in the new setup.
  
  3- we asked to override the 1hr limit. A few of our target requires integration
   times of ~1hr and,hence, ~1h10m of total execution time.

Critical Observing Condition Constraints

• none

Time-Critical Aspects

• none

Special Execution Requirements

• none

Special Calibration Information

• none

ToO Information

• N/A

ToO Activators List

• N/A

Do all your OBs comply with the instrument-specific requirements listed
 on the instrument-specific Phase 2 web page ?

• YES

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 ?

• N/A

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