README web version of /home/usg/OPS/MTS/readme_xml/readme_83060300

Principal Investigator Email Address

• ybialets@eso.org

Estimated Total Execution Time (hours, including overheads)

• 12

General Description

• This is a straighforward program devoted to observations of Diffuse Interstellar
   Bands (DIBs) in spectra of hot stars. All objects are very bright stars (2.6-6.6
   mag). We are going to observe in AO-mode in order to maximize the SNR. Since DIBs
   spectral features are quite shallow (few persent of the continuum lelel), a good
   SNR > 250..300 is essential. Although the program itslef is very simple, please
   pay attention to Special Execution Requirements below !!!

Waiver Requests

• ---(Empty)---

Critical Observing Condition Constraints

• no

Time-Critical Aspects

• no

Special Execution Requirements

• Some science OBs have correspondent telluric calibration OBs. Please,
   observe the telluric immediately before or after the science OB !
  There are two groups of pairs of the OBs (science - telluric), where SCI - is a
   science, CALIB - is a correspondent telluric:
  
  1. HD147165_SCI - HD147165_CALIB
  2. HD169454_SCI_[1..3] - HD169454_CALIB_[1..3]
  
  The OBs: HD148184_SCI and HD143118_SCI_[1..2] do NOT need a telluric.
  
  Seeing conditions (!!!):
  ------------------------
  
  Please, pay special attention to the actual seeing. Most of the objects are quite
   bright and in case if seeing gets better, there is a chance of getting into non-linear
   regime of the detector.
  Please, check the flux on the spectra.

Special Calibration Information

• Since we are aiming at high SNR spectra, therefore high-quality flat-fields
   are essential. Could you please in the end of the night manually increase the default
   number of corresponding day-time flats to 20 per spectroscopic setup ? Thanks in
   advance !

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