The form in the first page accepts three different types of input and combines them to return a list of matching catalogs; in addition, output options can be specified here (in the VizieR navigation bar )
These types of input are:
While you are filling the form, an estimation of the number of matching catalogs is shown near the bottom of the form (in green at the left of the Find Catalogs button).
It is composed of the following elements:
A last button
This possibility cimbines a free-text input (the left part) a list of keywords (the right part).
Note that
Note that
Within each of the 3 keyword lists, the selected items are ored, which means that e.g. selecting simultaneously Radio and IR items in the leftmost category will restrict the choice to catalogues dealing with Radio data or IR data (some browsers require to push down the Control key to remove one item or to select several items)
The choices specified in each of the 3 keyword lists are anded, which means that choosing keywords e.g. X-ray in the leftmost box, Rosat as a Mission name, and Galaxy in the rightmost box, will locate catalogues observed in the X-ray waveband, with the Rosat satellite, and dealing with galaxies. Entering qualifications in several of the proposed boxes will therefore rapidly result in an empty set.
This section of the form is opened by a click on the Search catalogs by column descriptions link.
This selection is based on a description of the contents of a catalog by a Unified Content Descriptor (UCD). The goal is to search catalogs containing the type of data (or columns) you are interested in.
It is made of two parts:
the UCD is written as a list of 1, 2 or 3 entity separated by a semi-colon (;) (note that the order of the entities is important); each entity is a made of one or several words separated by a dot (.) describing the logical view that you can see when you choose the UCD tree option.So, a UCD may be defined by:
UCD = entity[;entity[;entity]]]
with entity=word[.word[...]]The asterisk (*) iis interpreted as a wild card to include a set of UCDs or entities.
Three forms are available (you can switch from one to another with the radio buttons):
The UCDs may be combined with the logical operators or (|) and (&). By default (no operator specified), the UCDs and anded (combined with the & operator).
Examples:
arith | specifies all columns which have UCD including the entity (ie: [*;]arith[;*]) |
arith* | specifies all columns which have UCD including the word (ie: [*;]arith*[;*], include all entities arith.*) |
+phys.veloc;src.redshift;pos.galactic | specifies only columns which have this UCD. |
phys.veloc;*;pos.galactic | is a set of UCDs matching the a formatted type. |
last update: ls: cannot access '0.htx': Operation not permitted ls: cannot access '1.htx': Operation not permitted ls: cannot access '1g.htx': Operation not permitted ls: cannot access '2.htx': Operation not permitted ls: cannot access '3.htx': Operation not permitted ls: cannot access '4.htx': Operation not permitted ls: cannot access '5.htx': Operation not permitted ls: cannot access 'DirSearch.htx': Operation not permitted ls: cannot access 'ac2000.htx': Operation not permitted ls: cannot access 'adapt.htx': Operation not permitted ls: cannot access 'args.htx': Operation not permitted ls: cannot access 'batchmode.htx': Operation not permitted ls: cannot access 'colors.htx': Operation not permitted ls: cannot access 'cst.htx': Operation not permitted ls: cannot access 'customcol.htx': Operation not permitted ls: cannot access 'customcol1.htx': Operation not permitted ls: cannot access 'f_bgcat.htx': Operation not permitted ls: cannot access 'f_bgdat.htx': Operation not permitted ls: cannot access 'f_bgtit.htx': Operation not permitted ls: cannot access 'f_goviz.htx': Operation not permitted ls: cannot access 'f_script.htx': Operation not permitted ls: cannot access 'faq.htx': Operation not permitted ls: cannot access 'file.htx': Operation not permitted ls: cannot access 'footprint.htx': Operation not permitted ls: cannot access 'gsc.intro.htx': Operation not permitted ls: cannot access 'gsc1.2.intro.htx': Operation not permitted ls: cannot access 'gsc1.3.intro.htx': Operation not permitted ls: cannot access 'head.htx': Operation not permitted ls: cannot access 'history.htx': Operation not permitted ls: cannot access 'index.htx': Operation not permitted ls: cannot access 'intro.htx': Operation not permitted ls: cannot access 'menu.htx': Operation not permitted ls: cannot access 'navbar.htx': Operation not permitted ls: cannot access 'output.htx': Operation not permitted ls: cannot access 'query_setup.htx': Operation not permitted ls: cannot access 'syntax.htx': Operation not permitted ls: cannot access 'tail.htx': Operation not permitted ls: cannot access 'ucd_example.htx': Operation not permitted ls: cannot access 'vizjoin.htx': Operation not permitted ls: cannot access 'xy.htx': Operation not permitted