README web version of /home/usg/OPS/MTS/readme_xml/readme_75035200

Principal Investigator Email Address

• otoole@sternwarte.uni-erlangen.de

Estimated Total Execution Time (hours, including overheads)

• 19.074

General Description

• These observation make up a continuing survey of magnetic fields in hot
   subdwarfs. There are 22 targets, ranging from hydrogen-rich sdB and sdO to helium-rich
   sdO stars. Each target has one science OB and two calibration OBs (to be done during
   the day). Each calibration OB is identical. The science OBs contain typically three
   exposures at two different retarder waveplate settings (i.e. six total), allowing
   a S/N of 1000 or greater to be achieved. The circular polarisation of H and He lines
   will be measured, the magnetic field strength will be determined and compared with
   other stellar parameters.

Waiver Requests

• One waiver request was submitted (075.D-0352A.01.WAV), and was approved,
   to allow the use of the low gain mode of the CCD amplifier for these observations.
   This will allow fewer exposures on each target, meaning more time spent integrating.

Critical Observing Condition Constraints

• None. The targets can be observed with a seeing of up to 1.2 arcsec and
   an airmass of 2.0

Time-Critical Aspects

• None. Each object can be observed when possible during Period 75.

Special Execution Requirements

• None.

Special Calibration Information

• Since the observations are being made with a non-standard setting, extra
   calibration frames need to be taken. There are two calibration OBs for each target,
   one for flat fields and biases (subdwarf Cal Bias+Flat-*) and one for arc spectra
   (subdwarf Cal Arc-*). At the very least, the arc spectra should be taken during
   the day after each run, but it is preferable that both OBs are carried out for each
   target.

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 included OBs for any calibrations that you need but which are
 not part of the Calibration Plan ?

• YES

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 have prepared your finding charts with tools other than FIMS,
 do they comply with the specifications on the FORS1 Phase 2 web page ?

• N/A