69D0435A.html


Last update of this page: Thu Apr 24 17:45:05 2003
Last update of the USG file: Nov 6 15:15:43 2002

Major Instrument Modes: FORS2 - LSS

RA Range: ToO

Constraint set (Typical seeing, Transparency,Airmass, FLI, Moon distance): 2.0 3THN 3.0 1.0 20


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


Special Remarks:
This is a ToO. Wait for trigger.


 
 
This is a ToO LSS programme. It aims at taking advantage of the caustic
effect to spatially resolve the disk of the source star, allowing the
users to investigate in a unique way the variations of the source star 
atmospheric properties while the caustic lines sweep across the disk.

The caustic crossing alerts will be provided by the microlensing searching
teams. They are usually announced a few days before the events,
with a precision of about one hour. Their duration ranges from a few hours 
(fast) to a few days (slow). For this reason the users have supplied three 
sets of OBs, which they call Slow, Fast and Peak. The latter indicates the 
case of a bright smooth peak. The users will communicate the proper 
strategy to be followed at trigger time.

The users have also submitted two additional OBs, one to obtain the
spectrum of the target before the caustic crossing (TOO-A) and the other
for a spectrophotometric STD star.


 
 


Information about the progress of this run:

Run status page 69.D-0435A

README of this run:

69.D-0435A.README