README web version of /home/usg/OPS/MTS/readme_xml/readme_83038600

Principal Investigator Email Address

• russell.smith@durham.ac.uk

Estimated Total Execution Time (hours, including overheads)

• 20

General Description

• The targets are mostly dwarf elliptical (dE) galaxies in the Coma cluster,
   which we are observing with the FLAMES multi-IFU mode to measure velocity dispersions
   at the Mgb triplet. The total magnitudes are 17-19 in g. No spatial information
   is sought, only an integrated spectrum through the 3x3" aperture of the IFU, and
   the targets are quite extended; thus good seeing is no required. 
  
  In each field there are a few spare fibres allocated to objects with previously
   measured velocity dispersions, for calibration checks, and to a few additional interesting
   cluster galaxies. 
  
  Coma is classically a northern hemisphere target, but is above two airmasses for
   several hours per night in March, April and May. Since we are effectively using
   each IFU as a single "fat fibre", differential atmospheric refraction is not a severe
   problem.
  
  We have used long individual exposures (one per OB) to reduce impact of read noise
   which otherwise would otherwise be problematic since the surface brightnesses are
   low. There are three OBs per field, so cosmic-ray rejection will still be possible.
  
  Field F7 mostly covers calibration targets, and there are only 2 OBs. Here we have
   split each OB into two integrations, for cosmic ray rejection.
  
  Coma is at the north galactic pole, so there is not much freedom in choosing positional
   fiducial stars. In some of our fields there are only three FACB stars. In all cases
   we have tweaked field centres attempting to locate more FACBs, but cannot do this
   without sacrificing many of the targets.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• None

Time-Critical Aspects

• None

Special Execution Requirements

• None

Special Calibration Information

• None

ToO Information

• None

ToO Activators List

• None

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 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 specify in your OBs the hour angle range for which your Target
 Setup files are valid ?

• YES

Did you specify in your OBs the magnitudes of FACBs and Guide Star for
 all your fields ?

• YES

Are the FACBs and Guide Star in the brightness ranges specified in the
 FLAMES manual ?

• YES

Did you enter the expected signal to noise in your OBs ?

• YES