README web version of /home/usg/OPS/MTS/readme_xml/readme_76056000

Principal Investigator Email Address

• gil@ast.cam.ac.uk

Estimated Total Execution Time (hours, including overheads)

• 16.19

General Description

• We aim to obtain precise radial velocity (RV) measurements of two candidate
   M-dwarf
  eclipsing binary systems in the open star clusters M35 and NGC1647.  
  We require 8 measurements of each object.  The measurements should sample a
  range of phases in order to create radial velocity curves for the two binary
  systems.  We have chosen the DIC#2 centered at 760nm to capture the H-alpha line
  (in emission), the TiO5 bandhead (strong, sharp feature in M-dwarf stars) 
  at 705nm and the Ca infrared triplet (850-860nm) (narrow lines present in M-stars).
    
  
  We chose the instrument configuration and exposure times which allow us to
  obtain a S/N=10 near the TiO5 feature (705nm) and to avoid velocity smearing
  during a single exposure.  Thus, we require 2x2 binning and exposure times of
  48 minutes for the M35 object and 20 minutes for the NGC1647 object. 
  The objects are red, so do not require dark time.  
  
  We have included observation blocks for two different radial velocity 
  standards.  One has an RA less than the science targets and one has an RA greater
   than 
  the science targets.  One of the radial velocity standards must be observed
  each night a science target is observed.
  
  The science target in M35 has I=18 (V=21).  Due to its faintness,
  we have included a finding chart for this object and have included information 
  on acquisitioning a nearby bright star and offseting to the science target.
  We did not include a finding chart for the acquisition star.  It is an 8th magnitude
  object and the brightest star in the field.  The 1'x 1' finding chart looks like
   a single bright star.  
  
  The science target in NGC1647 has I=16.7 (V=19.3).  We have included a finding
  chart for this object.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• The targets must be observed with airmass > 2.0
  The M35 target must be observed with lunar illumination < 0.3
  We require a seeing of atleast 1.0"

Time-Critical Aspects

• To sample the phase curve adequately, the time between any two observations
   of 
  the science target in NGC1647 must be longer than 3 hours.  The time between any
   
  two observations of the science target in M35 must be longer than 5 hours.  
  There are no other time constraints on when the observations can be obtained.
  Any night one of the targets is accessible, modulo observing constraints, 
  is good for observing it.
  
  However, it is desirable (not required) to obtain multiple observations of the same
   target
  in a single night.  In this case, the calibration overhead is reduced because
  only one radial velocity standard star observation is required per night, and we
   are assured 
  of sampling different parts of the phase curve.

Special Execution Requirements

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Special Calibration Information

• We require ThAr arc lamps taken directly adjacent to each observation
   of the science
  target and the radial velocity standard.  This is necessary for accurate wavelength
  calibration to derive accurate radial velocities.
  
  We require observations of a radial velocity standard taken on each night a
  science target is observed.  We have defined observation blocks for two different
  radial velocity standards.  Only one radial velocity standard is necessary per science
   
  observation, however either radial velocity standard may be observed with either
  science target.  Please use the exact same instrument configuration
  for the radial velocity standard as for the science target.  If more than one target
   
  is observed on a single night or the same target is observed twice in a single night,
   
  then only one radial standard observation is required for that night.

ToO Information

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ToO Activators List

• ---(Empty)---

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• ---(Empty)---

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 ?

• YES

Have you included OBs for any calibrations that you need but which are
 not part of the Calibration Plan ?

• YES

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