README web version of /home/usg/OPS/MTS/readme_xml/readme_80071802

Principal Investigator Email Address

• suz@astro.ex.a.c.uk

Estimated Total Execution Time (hours, including overheads)

• 5.5

General Description

• The primary goal of this program (080.C-0718) is to confirm cluster
  membership and determine dynamical masses for a number of candidate
  pre-main sequence low-mass eclipsing binaries which were identified in
  a number of young open clusters on the basis of I-band photometric
  monitoring as part of the Monitor project (see e.g. LP 175.C-0685). To
  do this, we are using FLAME+UVES and the standard CD3/580nm setting,
  primarily to measure precise (~200m/s) radial
  velocities. 
  
  Additionally, we are using GIRAFFE and the HR14A setting to monitor
  radial velocities and Halpha profiles for several hundred candidate
  cluster members with light curves from the Monitor project in order to
  investigate the connection between rotation, accretion and
  binarity. Note that this differs from the proposal where we said we
  would use HR15. Since writing the proposal we have investigated the
  relative performance of the two settings for RV determination and
  found HR14A would be slightly better. We will obtain 1 epoch at HR15
  during the visitor mode run (run A) to measure Lithium EWs in the
  clusters where this is useful (NGC2362 and NGC2547, ONC was already
  covered in HR15 in P78).
  
  This run (run C) targets likely members of the Orion Nebula Cluster
  (ONC) which were already observed at 5 or 6 epochs in P78
  (078.C-0841). In P78 we monitored 230 objects in 2 field
  configurations, one observed 5 times and one 6 times. In P80, we
  follow-up on a restricted sample of ~115 objects (the interesting
  based on the data acquired so far) in a single field configuration, so
  as to maximise the number of epochs for these objects. This enables us
  to obtain 5 more epochs in the 5.5h allocation.
  
  Please note the special execution requirements concerning the time
  interval between OBs.
  
  Notes on the finding charts:
  
  Due to the strong and spatially variable nebulosity in the cluster,
  DSS could not be used to create the finding chart, which instead was
  generated using a 33'x33' sloan i-band mosaic image generated from our
  own observations of the INT with the Wide Field Camera (WFC) on the
  Isaac newton Telescope (INT).
  
  The black plus sign marks the field centre, the black circle the
  FLAMES FOV (25' diameter), the red diamond the guide star, the red
  squares the fiducial stars, the green circles the UVES fibres, the
  blue circles the Medusa fibres, and the blue crosses the sky
  fibres). We have checked our astrometry against 2MASS and find them to
  be consistent at the 0.06" level.

Waiver Requests

• A waiver request to allow the OBs to run up to 70 mimn was accepted
  with the proviso that the OBs will not be re-executed if the
  conditions degrade after 1h.

Critical Observing Condition Constraints

• The observations should be executed in clear conditions and with <=0.8"
   seeing to achieve the
  required signal-to-noise, and observing at airmass > 1.6 should be
  avoided or the fibre configurations will not be valid. There are no
  lunar illumination constraints, but in grey or bright time the moon
  should be kept > 30 deg from the targets.

Time-Critical Aspects

• The observatoins are not time-critical, but please note the special
  execution requirements regarding interval between consecutive OBs.

Special Execution Requirements

• Run C consists of 5 identical OBs, i.e. 5 epochs, ideally to be
  spread over a period spanning 1 week to 1 month. The exact interval
  between epochs is not critical, but should be no less than 8h, and
  preferably no more than 1 week. It is desirable to vary the interval 
  between consecutive OBs to minimise structure in the window function. 
  The order in which the OBs are
  executed doesn't matter as they are all identical. The executing
  of run C is not tied temporally in any way to that of runs A and B.

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

• ---(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 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