README web version of /home/usg/OPS/MTS/readme_xml/readme_81085400

Principal Investigator Email Address

• hsana@eso.org

Estimated Total Execution Time (hours, including overheads)

• 22.3

General Description

• SCIENCE: HiRes IR spectroscopy of bright (Kmag=3-7) O-type stars. 
  
  CRITICAL ASPECT : SNR better than 150 should be reached in all settings (exposure
   time computed to reach it under seeing=1.2"--CLR--airmass<1.5). Better SNR will
   not arm.
  
  EXECUTION CONSTRAINT: OBs for telluric standard stars have been submitted. Telluric
   OBs are identified by CAL_xxxxxx-n where 'xxxxxx' is the name of the science target
   and 'n'=1 or 2 according to the list of settings observed. It is advisable (best
   effort basis) to observe both OBs fo a given star the same night, or as close as
   possible in time. If not possible, please complete one object before starting the
   next one.  
  
  SCIENCE-TELLURIC SEQUENCE: Given the limited bright A0-1V stars suitable for telluric
   correction in that direction of the sky, some of the CAL stars should be observed
   *BEFORE* the science for proper AIRMASS MATCH.
  
  TELLURIC *BEFORE* the corresponding SCIENCE OB: 
  CAL_HD319718A+B-n
  CAL_HD167263-n
  CAL_HD167771-n
  CAL_HD168076-n
  
  TELLURIC *AFTER* the corresponding SCIENCE OB: 
  CAL_HD151804-n
  CAL_HD150958-n
  
  
  TELLURIC: All telluric standards are A0V-A1V star with K<6. If for any reason
   the provided telluric can not be
   observed, it can be replaced with a similar type star with similar magnitude as
   far as a SNR>150 is obtained in all settings (WARNING=1mag difference will already
   required to modified the exp. time compared to the provided target).

Waiver Requests

• * WaiverID:  081.D-0854A.01
  OBs larger than 1h approved. 
  
  * Replacement target: HD152385 --> HD150958

Critical Observing Condition Constraints

• see above

Time-Critical Aspects

• none

Special Execution Requirements

• Some Telluric should be observed just BEFORE the science OB to match the
   airmass.
  See description above

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?

• YES

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