README web version of /home/usg/OPS/MTS/readme_xml/readme_79056200

Principal Investigator Email Address

• rmennick@udec.cl

Estimated Total Execution Time (hours, including overheads)

• 24:47:30

General Description

• This is a project for observations of Double Periodic Variables (DPV)
   in the central 
  part of the Small 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. 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
   
  and chemical abundances.  
  Originally we specified the FLAMES/UVES configuration only, but we 
  asked for extension of our programme with GIRAFFE/MEDUSA for additional targets
   
  (e.g. fainter DPVs) located in the same field. Our request was approved 
  (Francesca Primas, 2007-01-15).

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• Since our targets are relativelly faint a 0.8 arcsec seeing is a must
   to get 
  necessery S/N ratio for our main targets. Execution under better seeing 
  conditions would help to get  significantly better results from our project.

Time-Critical Aspects

• Please execute a given type of OB only once on a given night (see Special
   Execution Requirements).

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. 10 OBs use UVES with 6 fibers and central
   
  wavelength at 520 nm, 15 OBs use UVES with 8 fibres and central wavelength 580 nm.
  - Each OB contains two expositions with identical setup.
  - Execution of given type OB only once per night.

Special Calibration Information

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ToO Information

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ToO Activators List

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Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

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Source(s) of Pre-imaging

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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 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