README web version of /home/usg/OPS/MTS/readme_xml/readme_81045701

Principal Investigator Email Address

• rmennick@astro-udec.cl

Estimated Total Execution Time (hours, including overheads)

• 8

General Description

• This run is aimed to explore the nature of the close binary star V393
   Sco. The idea is to map the orbital cycle of 7.7 days and the enigmatic long periodicity
   of 252 days in a large spectral range with a UVES-Dicroic mode.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• No critical observing condition

Time-Critical Aspects

• V393 Sco has good observability during all semester (April-September,
   more than 180 days, about 70% of the long period). We ask for three sub-runs each
   12 days long (one OB per night) repeated every two months (April-May, Jun-July,
   August-September). With that schedule we can obtain optimal data for science, mapping
   well orbital and long-cycle changes in the binary. Accordingly, OB time intervals
   have been separated in three two-month blocks, but please keep in mind that consecutive
   observations (ONE OB PER NIGHT) are required during each of these three blocks.
  
  Some questions posted by the staff of the User Support Department (Ferdinando Patat)
   regarding time critical aspects are replied below:
  
  We propose a minimum time separation between chunks
  of 2 weeks and  each chunk at least one week long.
  
  Ideally, once a chunk is started, the 12 OBs that are included
  must be executed at a rate of one per day during 12 subsequent
  nights.
  
  In the case of interruption of a sequence by any reason,
  the sequence can be re-started at any time in the 2-month window,
  but hopefully as soon as possible.
  
  In the case that the service mode runs last less than
  12 consecutive nights, we propose to continue with the
  sequence when the new service mode run starts. Each chunk
  should be at least one week long, ideally.

Special Execution Requirements

• Nothing special

Special Calibration Information

• Nothing special

ToO Information

• N/A

ToO Activators List

• N/A

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• N/A

Source(s) of Pre-imaging

• ---(Empty)---

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 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