README web version of /home/usg/OPS/MTS/readme_xml/readme_81050900

Principal Investigator Email Address

• orsola@amnh.org

Estimated Total Execution Time (hours, including overheads)

• 34:59:10

General Description

• This project aims at determining radial velocity shifts by means of high
   resolution spectroscopy, in a sample of about 15 central stars of planetary nebulae
   (hot pre-white dwarfs with few broad absorption lines), to determine whether they
   are binaries. Three epochs are requested for each star (two for some since one epoch
   is already in hand). There should be no more than one observation taken each night.
   A radial velocity shift larger than a few km/s between any two epochs will flag
   that object as a probable binary and sutable for followup on a future proposal.
    
  
  Regarding Find Charts: Most Charts are from the POSS2 Red survey. Sometime the nebular
   material is visible in the 1x1 min findcharts. I always indicate so when this is
   the case. When the nebula is too bright to see the central star, I also attach a
   chart in a different waveband where the PN is dimmer and the star is clearly visible.
  
  Regarding S/N: All S/N recalculated (sometimes the magntiudes have been updated
   - this is indicated in the OB comments). ETC values for Airmass, Seeing and Moon
   were (almost) worse case scnario: Airmass=2.0, Seeing=1.6, Moon=14 days.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• There are no citical observing conditions constraints.

Time-Critical Aspects

• 1. Two or three epochs per star are requested. If a target is observed
   once, then that target should be reobserved a second (and, for some targets) and
   a third time with HIGH PRIORITY. One observation of one target is no use for this
   project, since we are monitoring radial velocity changes.
  
  2. The two (three) epochs should be taken at least 1 night apart. Please execute
   only one OB per object in any given night.

Special Execution Requirements

• If a target is observed once, it should be observed at the very least
   a second time and ideally a third time with at least a few hours (a day is better)
   between them. All observations are in separate OBs, but each indicates clearly in
   the comments whether that OB is one of two OBs (or one of three OBs) for that given
   target.

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 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 ?

• 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 need secondary guiding, are there suitable objects within 30 arcsec
 from your target ?

• N/A