README web version of /home/usg/OPS/MTS/readme_xml/readme_80060701

Principal Investigator Email Address

• bertrand.lemasle@etud.u-picardie.fr

Estimated Total Execution Time (hours, including overheads)

• 8.2 h

General Description

• IR spectroscopy of highly reddened Cepheids.
  
  Our goal is to determine the chemical composition of the stars.
  
  We are working in no-AO mode with a slit width of 0.8".
  
  (Targets are on the center of the finding charts or indicated with an arrow).

Waiver Requests

• A waiver request to use a slit width of 0.8" in no-AO mode was granted.

Critical Observing Condition Constraints

• None

Time-Critical Aspects

• None

Special Execution Requirements

• Both setups 52/0/n and 49/0/n should be observed the same night for the
   following variable stars :
  QZ Nor - X Sct - V353 Sge - V415 Vul
  
  They can be observed in 2 consecutive nights for the following variable stars :
  SZ Aql - V336 Aql - MZ Cen - QY Cen - V2232 Cyg - SY Nor - V500 Sco - Y Sct
  
  Why ?
  both setups 52/0/n and 49/?/n are used together to determine the atmospherics parameters
   (Teff, log g, microturbulent velocity) of the stars.
  As we are observing variable stars, both setups must be observed the same night
   for the short period variables and 2 consecutives nights for the variables with
   longer periods.
  
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  We choose 2 telluric stars whose coordinates are similar to those of our targets.
   
  Targets are distributed in 2 groups of stars with similar coordinates. At least
   1 target of each group must be observed just after the observation of the corresponding
   telluric star. There is no problem if the remaining OB's are executed without consecutive
   telluric OB's.

Special Calibration Information

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ToO Information

• ---(Empty)---

ToO Activators List

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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?

• N/A

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