69.D-0026(A)

PI:Gieren/ Pietrzynski/ Munoz/ Fouqu\'e/ Bresolin/ Kudritzki/ Pont

Rank Class: A

RA Range: 0.9h - 24.0h

Constraint set (Typical seeing, Transparency,Airmass, FLI, Moon distance):
1.0 1PHO-2CLR 1.3 0.3 30.

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

 
 
The program wants to obtain images in B,V,I filters of a field centered
on the galaxy NGC 7793. Each exposure, in a given filter, consists
of 5 dithered 12 min integrations,using the offsets among the
individual integrations specified in the OBs.

Standard calibrations were requested.

Critical Observing !!!:
1. The observations in the second filter should follow the observations
  in the first filter immediately, to get accurate color information of the
  variables.
2. During 2 nights, however, the program requests a BVI sequence
  of target galaxy, plus a BVI sequence of a field centered on the galaxy
  NGC 300. All these observations should be obtained together (without
  observing other targets in between).
3. The observation nights 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).
4. The two nights on which the BVI sequences of NGC7793 and NGC300 are
 executed MUST be photometric.

PI defined OBs for 15 different observing nights, labeled
n1-n15. For instance, on the first night for the program he requests
observations through V and B filters, called n1-Cep-V and n1-Cep-B.

The program needs a time baseline as long as possible for this
programme. The observations for this programm should start as
early as possible (second half of June?).

 

Run status page 69.D-0026A

README of this run:

69.D-0026A.README

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