README web version of /home/usg/OPS/MTS/readme_xml/readme_82057500

Principal Investigator Email Address

• rmennick@udec.cl

Estimated Total Execution Time (hours, including overheads)

• 25

General Description

• This is a project for observations Double Periodic Variables (DPV) in
   two fields of the 
  Large Magellanic Cloud. DPVs are binary systems revealing photometric variability
   
  with orbital (from 3 to 15 d) and long (from 100 to 500 d) periods. 
  We selected a representative sample of this type objects to high (UVES) and intermediate
   
  (MEDUSA) resolution spectroscopy. Observations are dedicated for testing a hypothesis
   
  which explains nature and origin of the long-term variability and allow us to compare
  DPVs with normal binary systems. In this purpose we plan to determine the 
  rotational velocities of the stellar components, as well their 
  radial velocity changes. We need high spectral resolution with reasonable S/N ratio
   
  to detect the faint absoption lines that are good indicators of rotational velocity.
    
  In the proposal we specified the FLAMES/UVES configuration only, but we 
  asked for extension of our programme with GIRAFFE/MEDUSA for additional targets
   located
  in the same field. Our request was approved (Ferdinando Patat, 2008-07-25).

Waiver Requests

• According to our request 082.D-0575A.01.WAV we have aproved a list of
   objects
  for GIRAFFE/MEDUSA spectrograph (Ferdinando Patat, 2008-07-25).

Critical Observing Condition Constraints

• NA

Time-Critical Aspects

• NA

Special Execution Requirements

• We need the following strategy for observations:
  - There are two types of OBs with diffrent wavelength ranges and with a bit of different
   
  location of fibres in the same field. some OBs use UVES with 6 fibers and central
   
  wavelength at 520 nm, other OBs use UVES with 8 fibres and central wavelength 580
   nm.
  - Execution of given type OB and given field only once per night.
  
  For us the random order of the OB execution is the best one.
  Maximal spread in time for a given field is also the best for us.

Special Calibration Information

• Standard calibration plan.

ToO Information

• NA

ToO Activators List

• NA

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 ?

• 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

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