README web version of /home/usg/OPS/MTS/readme_xml/readme_81055500

Principal Investigator Email Address

• oleg@astro.uu.se

Estimated Total Execution Time (hours, including overheads)

• 35

General Description

• This observing programme consists of K band spectroscopy of young low-mass
   stars. 
  
  We use two standard wavelength settings: 2242.8 nm and 2329.3 nm.
  
  OB naming convention: _[_], where
   is an integer from 01 to 20
   is "A" for 2242.8 nm and "B" for 2329.3 nm
   is an integer number distinguishing identical OBs
  
  Each target OB requires observation of telluric standard star. Corresponding standard
   star OBs (early-type stars) are identified by the prefix "CAL_". We ask telluric
   star OB to be executed immediately before or after corresponding science OB. The
   spectra of telluric standard stars should have S/N~250 per pixel.
  
  Multiple exposures in 2242.8 nm wavelength setting (OBs *_A_*) are requested for
   8 targets. We request that corresponding science and telluric calibration OBs be
   obtained on different nights.
  
  For most OBs target star=AO guide star. Exceptions are the following
  a) 12_A, 20_A use brighter nearby stars as AO guide stars
  b) 14_A, 15_A, 16_A, 17_A, 18_A, 19_A are too faint in R band and don't have bright
   enough nearby stars. These OBs are executed in non-AO mode
  
  In all cases targets are bright enough in K band to be used as SVGS
  
  Finding charts have been prepared for targets in 8 OBs and telluric calibration
   targets in 1 OB. All other targets are by far the brightest objects in the CRIRES
   FOV and there should be no ambiguity in their acquisition.
  
  Observations are performed using ELEV mode for derotator. The exception is OBs 05_A_*
   and 05_B, where target a close visual binary system for which we would like to obtain
   spectra of both components. In this case observations are to be performed in SKY
   mode.

Waiver Requests

• Waiver request submitted to skip finding charts for unambiguous targets.
   Approved Jan 30.
  
  Waiver request submitted for execution time exceeding 1 hour for a few OBs. Approved
   Feb 11.

Critical Observing Condition Constraints

• Since performance of AO is degraded at high airmass, we ask all OBs to
   be executed when the target star is at airmass <=1.7. The exception is the brightest
   target of OBs 01_A_*, for which we relax this condition to <=2.0.

Time-Critical Aspects

• None

Special Execution Requirements

• Each target OB requires observation of telluric standard star. Corresponding
   standard star OBs (early-type stars) are identified by the prefix "CAL_". We ask
   telluric star OB to be executed immediately before or after corresponding science
   OB. The spectra of telluric standard stars should have S/N~250 per pixel.
  
  Since performance of AO is degraded at high airmass, we ask all OBs to be executed
   when the target star is at airmass <=1.7. The exception is the brightest target
   of OBs 01_A_*, for which we relax this condition to <=2.0.
  
  Multiple exposures in 2242.8 nm wavelength setting (OBs *_A_*) are requested for
   8 targets. We request that corresponding science and telluric calibration OBs be
   obtained on different nights.

Special Calibration Information

• ---(Empty)---

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?

• YES