README web version of /home/usg/OPS/MTS/readme_xml/readme_82014000

Principal Investigator Email Address

• roud@ast.leeds.ac.uk

Estimated Total Execution Time (hours, including overheads)

• 17h (please discard the acquisition for the 90-180-270 frames (24 minutes
   per ta

General Description

• DATA TAKEN TO BE TAKEN WITH THE HALPHA IF. 
  
  
  This is to do spectro-astrometry of Be stars. The observations are taken at 0, 90,
   180 and 270 degrees. With 180 really oppostie 0 and 270 opposite 90 degrees.
  
  Please take observations consecutively. The OBs at PA of 90 - 180 - 270 contain
   acquisition templates but these should not be needed. 
  
  We wish to get optimum SNR (i.e. at most 70000 electrons per pixel, corresponding
   to a total SNR of about 500-600. As these objects are bright, we are overhead read-out
   dominated, so it is important to have as many counts as possible per exposure without
   saturation. Please note : 
  The objects are variable and sometimes have very strong Halpha emission. 
  The exposure times are computed assuming a) 1 arcsec seeing, assuming b) no cirrus
   and c) assuming the Halpha emission lines are twice the continuum.  HOWEVER, the
   because the sources are variable, cloud cover may vary and the seeing may be different
   there is the chance of saturation across the Halpha line.
  
  PLEASE check for saturation and adjust exposure times accordingly.  The project
   aims for the best SNR.

Waiver Requests

• 1) permission for use of the UVES_red_obs_expfree OB so that HALPHA filter
   can be used
  
  2) permission for not submitting finding charts, as these are bright stars, that
   are easy to find, while they saturated the SKY images anyway.
  
  3) permission to observe hte objects at 4 position angles (defined in separare OBs)
   xonsecutively

Critical Observing Condition Constraints

• n/a

Time-Critical Aspects

• n/a

Special Execution Requirements

• Ideally in trhe order 0 - 90 - 180 -270 degrees PA

Special Calibration Information

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ToO Information

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ToO Activators List

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

• N/A

Do all your finding charts comply with both the general and instrument-specific
 Phase 2 Web Pages ?

• N/A

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