RA Range: 11.3 - 12h

Constraint set (Typical seeing, Transparency,Airmass, FLI, Moon distance): 2.0, THN, 2.0, 1.0, 30

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

 
 
 Simple spectroscopic program to monitor RR Lyrae stars in the direction 
of known High Velocity Clouds (HVCs) of neutral hydrogen in the halo of 
the Milky Way. The scientific goal is to obtain a first global picture of 
the distribution of cold and warm gas in the galactic halo, by detecting 
CaII and NaI absorptions. 

 No special requirement, except that each object needs to be observed at 3 
different epochs in order to cover at best its pulsation period. In short: 
for each given star, only one OB should be observed on a given night. 

 NOTE: a new set of OBs was added in middle of April, to cover the extra 
20h allocated to this program.
 
 

Run status page 69.C-0423A

README of this run:

69.C-0423A.README