274.D-5047(A)

PI:Jonker/ Nelemans

Rank Class: A

Last update of this page: Mon May 16 17:45:19 2005

PHOT	CLR	THN	THK	Seeing & Airmass Constraints:
--	--	2 OB(s)	--	Seeing < 0.80 Airmass < 2.00

Last update of the USG file: Apr 8 11:14:10 2005
Major Instrument Modes: FORS2 LSS

RA Range: 15h20m

Constraint set (Typical seeing, Transparency,Airmass, FLI, Moon distance):
0.8 3THN 2.0 1.0 30.

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

 
 
Phase-resolved LSS spectroscpy of the X-ray binary Cir X-1.  One 
target, 16 OBs.  The OBs CirX-1 to XirX-1-13 (#194737-194753; 43 
minutes each) are intended to be executed at random times during 
the orbital phase of this binary system, but should not be executed 
too close in time; the P.I. is therefore requesting that we only 
execute one of these OBs per night.

The OB CirX-1_PERIASTRON (#194822) is intended to get 5 hours of 
uninterrupted coverage of this binary when it is going through 
periastron.  Therefore this latter OB should only be attempted on 
(UT) March 25, April 10, April 27, May 13, May 30 or June 21!

Apart from reasonable good (< 0.8") seeing, no stringent constraints 
on observing conditions.


 

Run status page 274.D-5047A

Approved README of this run: