Pack: pack test

Description:

This is a set of small snippets using AstroTaverna plugin, developed in the Wf4Ever project. The purpose of this pack is to make the design and development of astronomy Virtual Observatory workflows easier, learning by the example.

AstroTaverna may be installed on Taverna 2.4 Workbench

http://wf4ever.github.io/astrotaverna/

Description:

The workflow creates a votable from the results provided by galfit. It returns this table and an aditional table that is joined to the input table. It requires a votable that contains a column with the file name resulting from running galfit and such files must be accesible from taverna. It uses astrotaverna plugin (http://wf4ever.github.com/astrotaverna/) and it has a dependency on stil library (http://www.star.bris.ac.uk/~mbt/stil/).

Description:

This workflow ask for text file using "Select_file" local services. This file is read by the "read_text_file", using "utf-8" as encoding. The result of "read_text_file" is splitted in lines by "split_string_into_string_list_by_regular_expression" and each of this lines is the input for the Rest_servise. The REST service search for each line (each line contains one name of one galaxy) some information about that galaxy. The string is like:

target=cig+1 service=NED(nedwww.ipac.caltech.edu) coordsys=ICRS ra=0.77358 dec=-1.91381 time(ms)=0

We convert this string into list of string using "split_string_into_string_list_by_regular_expression" We need extract the coordinates of the galaxy: the RA and DEC parameters, so we have to use two times the local services "filter_list_of_string_extracting_match_to_a_regex". One of them with the regex= "ra=(.*)" and the other one with the regex="dec=(.*)". The result of this both filters is a list of list, so we have to use "merge_string_list_to_a_string" to get a list.