README web version of /home/usg/OPS/MTS/readme_xml/readme_83059001

Principal Investigator Email Address

• skraus@mpifr-bonn.mpg.de

Estimated Total Execution Time (hours, including overheads)

• 7.9

General Description

• The aim of this program is to obtain high-resolution spectroscopy of the
   Bracket-Gamma 2.1661 micron line emission of a sample of 11 T Tauri and Herbig Ae/Be
   stars, complementing VLTI/AMBER spectro-interferometric observations which are also
   scheduled for P83.  All target stars are relatively bright at visual and near-infrared
   wavelengths and can be used as AO and SV guide stars.
  
  To record the Bracket-gamma line, we selected the free wavelength setting 2165 nm
   (order number 26).
  Since we use a narrow slit of width 0.2", please center the star very accurately
   onto the slit in order to feed sufficient flux into the spectrograph.
  
  *** HD144432, MWC863 and SCrA are known to have close companions:
  (a) HD144432 has a faint companion, located at a separation of 1.4" towards the
   north (PA=4 deg; Delta-V=4.5 mag; Delta-K=3.1 mag).
  (b) MWC863 has a companion, located at a separation of 1.1" towards the south-west(PA=236
   deg; Delta-V=3.4 mag; Delta-K=2.4 mag).
  (c) SCrA has a companion, located at a separation of 1.4" towards the south-east
   (PA=157 deg; Delta-V=1.0 mag; Delta-K=0.7 mag).
  
  In all cases, we have oriented the slit perpendicular to the binary separation vector.
  Please center the slit on the main component (brightest star in the field).
  For all systems, we have prepared additional finding charts, showing the system
   at higher resolution.

Waiver Requests

• We asked for permission to use a free wavelength setting in order to center
   the Bracket-gamma line properly.
  The Waiver Request was approved on February 6.

Critical Observing Condition Constraints

• None.

Time-Critical Aspects

• None.

Special Execution Requirements

• None.

Special Calibration Information

• None.

ToO Information

• ---(Empty)---

ToO Activators List

• ---(Empty)---

Do the README file and the instrument comments of the telluric stars
 OBs include the required S/N/pixel of the spectrum of the telluric star, its spectral
 type and allowed spectral range?

• YES

Do any OBs include wavelength or flatfield calibrations?

• NO

If you are observing Moving Targets, have you attached suitable ephemeris
 files to your OBs?

• N/A

If the slit viewer guide star is different from the target, are the RA
 and DEC offsets accurate to within 0.05 arcsec and do they take into account the
 relative proper motion between the two objects?

• N/A

If you have preferences which OBs should be executed first for objects
 at similar RA, did you make use of the User Priority field in the OBs?

• N/A