- Note
- This web site runs actually under twiki and will be saved statically in the comming weeks. If you want to bookmark this web site, please use the following url which will be permanent: http://www.jmmc.fr/VltiSchool2010 One copy of the key informations will also be saved under the European Interferometry web site.
Here you can find the information related to the AMBER data reduction practice session
The practice session is based on the user manual of the AMBER data reduction software, especially the cookbook of section 4. You can access it by following this link:
http://www.jmmc.fr/doc/approved/JMMC-MAN-2720-0001.pdf. The AMBER data reduction software is available on the JMMC webpage:
http://www.jmmc.fr/data_processing_amber.htm.
The material of this practice session can be accessed in subdirectories of your
/home/school/data/amber
directory. You will first reduce the sample dataset in the directory
alfara
together with the teachers, and then will be left alone to reduce a complete dataset on the star HD87643, situated in the
HD87643_AMBER
directory
A complete sequence of
amdlib yorick commands can be found here to reduce a dataset.
Once you have reduced all the nights of AMBER data, you will have a series of
PRODUCT_HD87643_*.fits
files in the
2008-*-*/2008-*-*_3.0b4_OIDATA_AVG/
directories. You can then type the following command to pack all the files together in a single directory:
cp /home/linux/Tuto_amber/HD87643_AMBER/2008-*-*/2008-*-*_3.0b4_OIDATA_AVG/PRODUCT_HD87643*.fits /home/linux/Tuto_amber/HD87643_AMBER/RESULTS/
Then you can select a wavelength interval with an additional
yorick
script called
amdlibPipeline.i
. To load it, once in
yorick
, please type
include,"amdlibPipeline.i"
. Then, type
help, filterOiFile
. For example, if you wish to keep only the K-band, type
filterOiFile, wlenRange=[2.05,2.45]*1e-6
and apply the script to all the product files together. You will have new files created which you can put then in the
/home/linux/Tuto_amber/HD87643_AMBER/RESULTS/FILTERED/
subdirectory.
Then, the last step is to pack all the files into a singla oi fits file. To do that, you can for example go to the
/home/linux/Tuto_amber/HD87643_AMBER/RESULTS/FILTERED/
subdirectory and type into a console (NOT in yorick!)
oifits-merge HD87643_Kband.oifits *.fits
.
You should have then a
HD87643_Kband.oifits
file that you will be able to use for the model-fitting and image reconstruction tutorials!
Additionnally, you should use gasgano (just type
"gasgano"
) to look at the structure of all the files in, e.g., the
/home/school/data/amber/alfara
data. Use
fv
to look at the innnards of fits files.
Some references that may be useful for this session:
- AMBER data reduction, Goutelas Book. Note that the software from which the illustrations were derived has evolved a lot since. You will use the last version of both the AMBER data reduction library (amdlib v3.0) and of the Yorick interface.
--
TWikiGuest - 2010-05-18
This topic: Jmmc/VltiSchool2010
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Topic revision: r1 - 2010-06-07 - TWikiGuest
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