README web version of /home/usg/OPS/MTS/readme_xml/readme_77045200

Principal Investigator Email Address

• mradis@das.uchile.cl

Estimated Total Execution Time (hours, including overheads)

• 13.0

General Description

• These observations will provide high-contrast, high-spatial resolution
   imaging to look for substellar companions (Giant Planets or Brown Dwarfs) and very
   low mass stars orbiting nearby WDs. The WDs were selected from a sample of WDs up
   to 20 pc, where almost all have high proper motion. It will be usefull to confirm
   candidates by observing them in a second epoch. The observations consists of simple
   imaging in J-band with repeated jitters in a WD position in very large exposure
   (& execution) times, to reach the required detection limit of giant planets
   and/or low mass brown dwarfs.
  
  IMPORTANT: Most of the targets OBs have two different NACO_img_obs_Autojitter templates,
   because of their high brighteness. The first NACO_img_obs_Autojitter template within
   an OB has DIT avoiding the non-linearity range, and it is necessary for PSF calibration,
   WD astrometry and photometry, while the second template with DIT near to the saturation
   limit is necessary to reach the required depth to detect a giant planet with reasonable
   execution times (to lessen overheads). Both templates are very important for the
   success of our project. Targets that have only one NACO_img_obs_Autojitter template
   have DITs that don't saturate the primary (WD), this is possible because the primary
   is not too bright. We avoided that any star in the FOV over-saturates the detector
   (i.e., with less than 1.5 times of the number of counts of the saturation limit).
  
  NB: Coordinates in the OBs are given in equinox J2000, for the epoch 2000.0 . Stars
   have high proper motion, so proper motion have to be taken in account to calculate
   coordinates for observation epoch.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• It is necesary to make observations with very good seeing (0.6'') to reach
   to detect very faint objects (24 mag in J-band). Also it is required to carry out
   the observations in smaller airmass as this were possible, to lessen differential
   color difraction and to obtain a better FWHM of the objects. The best period are
   indicated in each OB, in Calibration Requeriments.

Time-Critical Aspects

• There is not Time-Critical aspect.

Special Execution Requirements

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Special Calibration Information

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ToO Information

• ---(Empty)---

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 ?

• 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 ?

• YES

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 have PSF reference star OBs, do the names of those OBs begin with
 PSF_ ?

• N/A

If there are Finding Charts attached to your OBs, is the field-of-view
 of at least one of these charts 2' x 2' (with clearly labelled field orientation)
 ?

• YES

Have you clearly marked and labelled your wavefront reference objects
 R1, R2, R3, ... (as specified in the NAOS Preparation Software) on your Finding
 Charts ?

• YES

Have you specified the magnitude of the brightest object in the field-of-view
 for each OB ?

• YES

Are there objects in any of your fields (including standard stars) which
 are brighter than the limits specified in the User Manual and on NACO web Pages
 ?

• NO

If the previous answer is yes, have you given a list of OBs and a justification
 for the brightness limit violation in the general description field ?

• N/A