README web version of /home/usg/OPS/MTS/readme_xml/readme_77087200

Principal Investigator Email Address

• Roland.Walter@obs.unige.ch

Estimated Total Execution Time (hours, including overheads)

• 27 hours

General Description

• This programs aimed at obtaining the orbital solution through radial-velocities
   in the near-IR (K band) of two high-mass X-ray binaries. We request 20 spectra per
   target. Each spectrum is composed of observations at 2 different central wavelengths
   in order to maximize the number of spectral lines for cross-correlation. 
  
  Following phase-2 reviewer advices, we adjusted the DIT for a value above 300 sec.
   It has been adjusted exactly (352.5 sec) to make each OB exactly 40.5 minutes. Hence
   40.5 min * 20 spectra * 2 targets = 1620 min (i.e. 27 hours).
  
  Reference star must also go into the slit (see finders). Note that no OBs for a
   radial-velocity standard star is provided. We will rely on the position of OH skylines,
   which should provide an accuracy high enough for our MXRB (20-40 km/s roughly).
  
  A slit of 0.6 is needed in order to achieve the required resolution. 
  
  Finding charts are made with 2MASS in the K band. For IGR J17272-3616, as requested,
   an additional finding chart has been crated with the ISAAC acquisition image, because
   the reference star appeared to be a visual binary. The new finding chart specify
   which star to be put on the slit (the west-south star), in addition to the target.
  
  The program is a XMM-VLT joint proposal. However, VLT-ISAAC observations do not
   need to be taken simultaneously with XMM.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• None.

Time-Critical Aspects

• Do not observe the same star twice during one night. We need the spectra
   to be taken at different nights. 
  
  We have computed that 20 spectra taken randomly on different nights will cover the
   orbital phase roughly with the same quality than at specified phases. We will be
   able to recover the orbital motion in both cases, as long as 20 spectra are taken.

Special Execution Requirements

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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

If you submitted OBs for standard stars, did you use the provided StandardStar
 templates ?

• N/A

If you are using a specific offset pattern or position angle, did you
 check carefully the definition in the manual ?

• N/A

If you are doing spectroscopy, did you draw the slit on the Finding Charts
 ?

• YES

Did you enter the magnitude of the brightest star in the field-of-view
 in the 'Instrument Comments' field of each OB ?

• YES

If you use the MoveToPixel acquisition, have you given clear instructions
 on the FC and in the OB comment section as to how the field should be centered ?

• N/A