RA Range: 0.6 - 23.7h

Constraint set (Typical seeing, Transparency,Airmass, FLI, Moon distance): 1.2, THN, 1.2, 1.0, 30

Pre-imaging run?	No!	Chilean run?	No!	Special calibrations?	No!
Time critical?	No!	ToO?	No!	Carry-over run?	No!

 
 
 High-res spectroscopy of metal-poor subgiants with the aim of measuring 
the oxygen abundance from 3 different O diagnostics (UV OH lines, 
forbidden line and the triplet). Very high S/N is required due to the 
weakness of some of the targeted lines. Finding charts provided but 
probably superfluous, objects very bright. 

 Due to possible interference with telluric lines, observation of one 
rapidly rotating B star is needed on every night a program star is 
observed. It would be desirable if the program could be carried out 
during as few nights as possible in order to have several program stars 
observed on the same night under similar conditions.

 Requirements: 1. for five stars (CD-24 1782, HD27928, HD45282, BD-1 2582 
and HD108317) specific time intervals for the observations have been 
specified in the OBs (visible from P2PP, but see also modified README file, 
and PRS tickets USG-04197 and USG-04261); 2. for one additional star  
(HD126587) the user prefers that the observations are performed during 
the very end of the period (after March 15); 3. due to the very high 
targeted S/N, the user has asked for a number of daytime flat-fields higher 
than usual. 

 
 

Run status page 68.D-0546A

README of this run:

68.D-0546A.README