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VALD3 Database | ||
-------------- | ||
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Step 1, Request the files | ||
~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
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The download of the line lists can either be done manually through | ||
the website, or in a more automated way, by using navigation scripts. | ||
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Before the VALD data can be acessed, one has to register on the VALD website. | ||
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Attention, there is a limit of 100000 transition lines per query. Some species have more lines | ||
than that. Is this case, the wavenumber ranges have to be split into two parts. This is | ||
especially the case for Fe and Cr. | ||
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Method A, manual request | ||
^^^^^^^^^^^^^^^^^^^^^^^^ | ||
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- Vist ``http://vald.astro.uu.se/`` | ||
- Register with email address | ||
- Choose Mirror Server | ||
- Click ``Extract Element`` | ||
- Click ``Unit selections`` and select: | ||
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- Energy level units: cm-1 | ||
- Give wavelenths in medium: vacuum | ||
- Wavelength units: cm-1 | ||
- Van der Waals syntax: Default | ||
- Isotopic scaling: Off | ||
- click ``Save settings`` | ||
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- click again ``Extract Element`` | ||
- check the units, they must be ``Energy unit: 1/cm - Medium: vacuum - Wavelength unit: 1/cm - VdW syntax: default`` | ||
- Enter Starting wavenumber, e.g. 0.001 | ||
- Enter Ending wavenumber : e.g. 1000000 | ||
- Enter Element: e.g Fe 1, (ionizaion number = 1 means neutral) | ||
- Extraction format : Long format | ||
- Retrieve data via : FTP | ||
- Select ``Include HFS splitting`` | ||
- Enter a comment in ``Optional comment for request``, for example the element and ionization number. | ||
- Click ``Submit request`` | ||
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Method B, using scripts | ||
^^^^^^^^^^^^^^^^^^^^^^^ | ||
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Also this mehod requires to first visit the web interface manually and to | ||
choose the correct units, the same way as Method A. | ||
After that, the vald_request.py script can navigate the webiste and fill in the necessary webforms. | ||
For this, a geckodriver needs to be installed. | ||
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Then type: | ||
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:: | ||
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python3 vald_request.py -Z <z> -I <i> -u <email address> | ||
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where ``<z>``\ is the atomic number and ``<i>``\ the ionization state (i = 0 is neutral) | ||
The email address must be the same as the user account from the VALD website. | ||
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Step 2, download the files | ||
~~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
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After a few minutes you will get an email from VALD with a link to download the data file. | ||
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Method A, manual download | ||
^^^^^^^^^^^^^^^^^^^^^^^^^ | ||
Download the file and unpack it. Rename the file to ``VALD<Z><I>.dat``. | ||
E.g VALD2600.dat for Z = 26, I = 0 (I = 0 means neutral atoms). | ||
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Method B, using scripts | ||
^^^^^^^^^^^^^^^^^^^^^^^ | ||
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The requested files are stored temporarely on the VALD webiste with a name similar to | ||
``SimonGrimm.4199418``, where the first part is the user name, and the second part is the | ||
job number. The vald_download.py script can download all requested files, scan which element | ||
they contain and rename them according to the element number. | ||
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:: | ||
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python3 vald_download.py -jobstart <start> -jobend <end> -jobname <name> | ||
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The name is the user name from the VALD webiste, e.g SimonGrimm. | ||
The jobstart is the first jobnumber (check email from VALD) .e.g 4199418. | ||
The jobend is the last jobnumber (check email from VALD) .e.g 4199420. | ||
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The files are renamed as ``VALD<Z><I>.dat``. | ||
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Step 3, partition function files | ||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
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Partition functions are not available in the VALD database. | ||
Therefore we use the partition functions calculated from the NIST database. | ||
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Step 4, calculate natural broadening coefficients and create the binary files and ``< species >.param`` files | ||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
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For many species, the vald database provides broadening coefficients, | ||
but not for all. The missing coefficients are calculated in this step. | ||
That can take a while to complete. | ||
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:: | ||
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python3 vald.py -Z <z> -I <i> | ||
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This step creates the ``< species >.param`` and the `*.bin` files. | ||
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Step 5, data path | ||
~~~~~~~~~~~~~~~~~ | ||
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Include the path of the directory, which contains the obtained binary | ||
files, the ``*.pf`` partition function files and the ``*.param`` file to | ||
the HELIOS-K ``param.dat`` file under ``pathToData``. | ||
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References | ||
~~~~~~~~~~ | ||
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Vald provides reference files for each species. We rename these ``*.bib`` | ||
the same way as the data files. When using data from VALD, all these references | ||
must be cited in publications. | ||
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We list here also the citation conditions from VALD: | ||
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:: | ||
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A short note on using VALD data : | ||
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The VALD data and services are provided free of charge on the following conditions: | ||
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1. If VALD has been used in your research work, you agree to include the acknowledge | ||
below as well as citations to the following papers where appropriate: | ||
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"This work has made use of the VALD database, operated at Uppsala University, the | ||
Institute of Astronomy RAS in Moscow, and the University of Vienna." | ||
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Ryabchikova T., Piskunov, N., Kurucz, R.L., et al., Physics Scripta, vol 90, issue 5, article id. 054005 (2015), (VALD-3) | ||
Kupka F., Ryabchikova T.A., Piskunov N.E., Stempels H.C., Weiss W.W., 2000, Baltic Astronomy, vol. 9, 590-594 (2000), (VALD-2) | ||
Kupka F., Piskunov N.E., Ryabchikova T.A., Stempels H.C., Weiss W.W., A&AS 138, 119-133 (1999), (VALD-2) | ||
Ryabchikova T.A. Piskunov N.E., Stempels H.C., Kupka F., Weiss W.W. Proc. of the 6th International Colloquium on Atomic Spectra and Oscillator Strengths, Victoria BC, Canada, 1998, Physica Scripta T83, 162-173 (1999), (VALD-2) | ||
Piskunov N.E., Kupka F., Ryabchikova T.A., Weiss W.W., Jeffery C.S., A&AS 112, 525 (1995) (VALD-1) | ||
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2. You also agree to reference to original source(s) of the line data that are important for your research. | ||
A complete list of references is available from the bibliography section of the VALD manual. A short list | ||
of references is compiled and sent to you with every reply from VALD. | ||
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