Download VIMOS User's Manual

LAS réf.
VIR réf.
Issue
Date
9.2
VLT-PLA-VIRA1.0
Rév. 0.0
24-Oct-02
page
47
Observation Templates
Observation templates define a restricted set of possible instrument configuration. Observations
carried out using these templates, can later on be reduced using VIMOS DRS reduction recipes.
Observations which could be done using different instrument settings, are not supported by DRS
recipes and Automatic pipeline
9.2.1 Imaging Mode
All imaging mode Observation templates allow usage of PHOTOMETRIC FILTERS ONLY and of
Imaging CCD readout mode ONLY (i.e. only the central 2048x2340 pixels are read)
9.2.1.1
VIMOS_img_obs_Stare
Generic purpose template to observe a field in Direct Imaging Mode. If more than one exposure is
requested (Numebr of Exposures > 1), each exposure will be “Exposure time”seconds long
Table 17: parameters for VIMOS_img_obs_Stare
Parameter Name
Exposure time
X binning factor
Y binning factor
Readout Mode
Filter Name
Number of exposures
Exposure Name
9.2.1.2
Descritpion
Exposure time for one observation in seconds
Binning factor in X direction (1 or 2)
Binning factor in Y direction (1 or 2)
CCD read-out mode (Fast, Medium, Slow)
Photometric filter to be used: U,B,V,R,I,z
Number of exposures to be made
Root name for resulting files
VIMOS_img_obs_Jitter
Template to observe a field in Direct Imaging Mode, slightly shifting the pointing from one exposure
to the next. The offset from one exposure to the next is given by the two parameters “List of Offset in
X” and “List of Offset in Y”. Offset can be given either in pixels (if “Offset Coordinates”is set to
DETECTOR) or in arcseconds(if “Offset Coordinates” is set to SKY). Offsets are always incremental
from the previous position and are to be read as offsets of THE OBJECT ON THE IMAGE )i.e. the
Telescope will move in the other direction.
Each exposure will be “Exposure time”seconds long
Example
Offset Coordinates = SKY
List of Offset in X = 0 1 0 –1 0
List of Offset in Y = 0 0 1 0 –1
Number of exposures = 5
Exposure N.ro
X shift
Y shift
1
2
3
4
0
1
0
-1
0
0
1
0
Xtotal
shift
0
1
1
0
Y total
shift
0
0
1
1
_______________________________________________________________________________________
Word Windows 2000
manual-v1
Fichier : vimos-users-