README web version of /home/usg/OPS/MTS/readme_xml/readme_78064300

Principal Investigator Email Address

• norbert@astro.uu.se

Estimated Total Execution Time (hours, including overheads)

• 1:30

General Description

• The programme consists of simple UVES observations of the most iron-deficient
   star known, HE0107-5240 ([Fe/H]=-5.7), and a comparison star, CD -38 245 ([Fe/H]=-4.0),which
   is used as radial velocity standard. The aim of the program is radial velocity monitoring
   of HE0107-5240.  If the star is a binary, this would have important consequences
   for the interpretation of its abundance pattern; i.e., it would be likely that it
   is a Population III star.
  
  In order to stay below the maximum execution time of 1h per OB, a 2880s exposure
   of HE0107-5240 with the 390+564 setting and a 1'' slit in the blue and 0.6'' slit
   in the red arm shall be taken. A 1080s minute exposure of CD-38 245 shall be taken
   with the same setting immediately afterwards. We use a 1x1 pixel binning because
   we are not readout-noise limited; the reduced spectra will be re-binned by a factor
   of 2 in order to increase the S/N.
  
  A ThAr should be taken directly after both observations in order to increase the
   radial velocity accuracy, since the expected radial velocity variations are only
   of the order of a few km/s.
  
  For avoiding slit losses due to atmospheric differential refraction, the slit is
   put to the parallactic angle, and the derotator mode is set to "ELEV" in the OBs.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• None

Time-Critical Aspects

• None

Special Execution Requirements

• OB cal_dic1_CD-38345 to be executed immediately after sci_dic1_HE0107
   for monitoring of radial velocity accuracy.

Special Calibration Information

• A ThAr is attached to each OB in order to increase the accurady of the
   radial velocity measurements.

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

• N/A