README web version of /home/usg/OPS/MTS/readme_xml/readme_80017001

Principal Investigator Email Address

• gmathys@eso.org

Estimated Total Execution Time (hours, including overheads)

• 7h59min

General Description

• The purpose of this run is to obtain spectra of the extremely magnetic
   Ap star HD 75049 at 12 epochs spread across Period 80 so as to determine its rotation
   period, and to characterise the variations of its mean magnetic field modulus and
   of its mean quadratic magnetic field with this period. In order to achieve these
   objectives, it is essential that the epochs of execution of the different OBs be
   distributed in a fairly even manner over most of the period. Exact time intervals
   between two consecutive epochs of observations are unimportant, but too short intervals,
   as well as the accumulation of a significant fraction of the observing epochs over
   a short fraction of the semester should be avoided. As a rule, the time interval
   between two consecutive epochs of observations should be longer than a week; as
   an exception, a single pair of OBs (out of the total of 12) mutually separated by
   only 2-3 days (but separated from any other OB by more than a week) would be acceptable,
   and might possibly even be useful.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• In order to avoid possible saturation of part of the spectrum, the submitted
   OBs should only be executed in seeing *worse* than 0.6 arcsec.

Time-Critical Aspects

• It is essential that the epochs of execution of the different OBs be distributed
   in a fairly even manner over most of the period. Exact time intervals between two
   consecutive epochs of observations are unimportant, but too short intervals, as
   well as the accumulation of a significant fraction of the observing epochs over
   a short fraction of the semester should be avoided. As a rule, the time interval
   between two consecutive epochs of observations should be longer than a week; as
   an exception, a single pair of OBs (out of the total of 12) mutually separated by
   only 2-3 days (but separated from any other OB by more than a week) would be acceptable,
   and might possibly even be useful.

Special Execution Requirements

• N/A

Special Calibration Information

• N/A

ToO Information

• N/A

ToO Activators List

• N/A

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• N/A

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 ?

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

• N/A