WFI

Last update of this page: Mon Apr 2 13:45:08 2007

PHOT	CLR	THN	THK	Seeing & Airmass Constraints:
--	33 OB(s)	--	--	Seeing < 1.60 Airmass < 1.60

Last update of the USG file: Oct 12 15:00:44 2005
Major Instrument Modes: WFI with B and V filters

RA Range: 0.2h - 0.9h

Constraint set (Typical seeing, Transparency,Airmass, FLI, Moon distance):
1.2 - 1.5 1PHO-2CLR 1.6 0.3 30

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

 
 
Latest update (October 2005):
=============================
  The PI has accepted a relaxation of the seeing constraint from 1"2 to 1"6 
in the remaining OBs. 

  Also, please note the higher priority of the V-band observations.

P72:
This program is a continuation of observations obtained during the
period 71 for NGC 55 and NGC 247. PI wants to obtain images in B,V filters of
a field centered on these galaxies.

Observation nights for this program should be spread out over a time interval
as long as possible, because the principal scientific aim is to detect
long-period Cepheids from the images. Within this time interval,
observation nights should be distributed as uniformly as possible
(avoiding images on consecutive nights).

P71:
PI wants to obtain images in B,V filters of a field centered on
the galaxy NGC 55. During 2 photometric nights, however,
he requests a BV sequence of our target galaxy, together with a BV sequence
of the field centered on the SMC. This latter SMC standard star field
should be observed at three, and four, respectively, significantly different
airmasses between 2.0 and 1.33.

Observation nights for this program should be spread out over a time interval
as long as possible, because the principal scientific aim is to detect
long-period Cepheids from the images. Within this time interval,
observation nights should be distributed as uniformly as possible
(avoiding images on consecutive nights).

SPECIAL NOTE: PI submitted OBs for a near-identical WFI programm on another
Sculptor galaxy, NGC 247. He requests that at least on one, and ideally on
both of the nights on which the standard SMC field will be observed for this
(NGC 55) programm, one set of OBs, in B and V filters (e.g. NGC247-V-N1
and NGC247-B-N1) corresponding to the NGC 247 programm will be executed as
well.
 
PCa requested.

 

Run status page 171.D-0004E

Approved README of this run: