README web version of /home/usg/OPS/MTS/readme_xml/readme_78018500

Principal Investigator Email Address

• pettini@ast.cam.ac.uk

Estimated Total Execution Time (hours, including overheads)

• 15 hours

General Description

• High Resolution Spectroscopy of a bright QSO with z_em = 2.785
  
  Of particular interest are absorption lines in a damped Lyman
  system at z_abs = 2.61844, especially at the UV end of the spectrum,
  shortwards of 3500 A.
  
  Two standard settings have been chosen 390+564 (Dic-1) and 390+760 (Dic-2)
  to cover most of the optical spectrum at relatively uniform S/N. (S/N will
  be lower in the far-UV). 6 OBs prepared at each setting.
  
  QSO should be visible at acquisition. 
  
  All the observations are to be conducted with the slit vertical
  on the sky (throughput in the UV is critical).

Waiver Requests

• For maximum observing efficiency and compatibility with earlier
  archive data on the same object, we chose exposure times of 3800-3900 s,
  leading to execution times of about 1 hour and 15 minutes.
  
  These longer exposures were approved by USD. I am aware that 
  these extended exposure time mean that ESO cannot guarantee
  that the observing condition requirements are maintained throughout
  the full exposure time.

Critical Observing Condition Constraints

• None

Time-Critical Aspects

• None

Special Execution Requirements

• All the observations are to be conducted with the slit vertical
  on the sky

Special Calibration Information

• I have attached wavelength calibration requests for the
  390+564 (Dic-1) standard setting OBs.
  
  I understand that this option is not available for the 
  390+760 (Dic-2) standard setting.

ToO Information

• N/A

ToO Activators List

• N/A

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• None

Source(s) of Pre-imaging

• ---(Empty)---

Pre-imaging sources not listed above

• ---(Empty)---

Do all your OBs comply with the instrument-specific requirements listed
 on the instrument-specific Phase 2 web page ?

• YES

If this is a pre-imaging run, did you select PRE-IMAGING for the Observing
 Category for each Observing Template ?

• N/A

Do all your finding charts comply with both the general and instrument-specific
 Phase 2 Web Pages ?

• YES

If you submitted OBs for standard stars, did you specify the magnitude
 and spectral type of all standard stars in the OBs ?

• N/A

Have you included OBs for any calibrations that you need but which are
 not part of the Calibration Plan ?

• N/A

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

• N/A

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

• N/A

If this is a run that requires coordinated observations with other facilities,
 did you give proper instructions in the Time-Critical Aspects Section ?

• N/A

If you need secondary guiding, are there suitable objects within 30 arcsec
 from your target ?

• N/A