QUERY AND OPTIONS
Spectra can be selected inside a given area centered at the input
J2000 (ra,dec) center. The area selection can be performed by two modes:
- a circle with radius "size";
- a square box of side "size".
Spatial units are arcsec (asec,s)or arcmin (amin,m).
Three query types are available: single, file and batch.
- single query type allows a single area extraction.
query type allows to retrieve more than one selection area. The
query is interactive and results are displayed after the elaboration in
the browser table.
query type also allows to retrieve more than one selection area but
results will be provided in an off line tar-gzipped file after an e-mail
notification. "batch" queue is slower than "file" queue but permits up to
5 queries at time.
Among the other intuitive options, the "search plates" one let you choose if
data must be extracted from a single (default) plate or from all the area
overlapping plates. Default plate is defined as the plate with smallest
center distance from the input center.
INPUT FILE FORMAT
What follows applies to both batch and file query type.
Query input file must be an ascii file with comma separated columns.
Columns muste be: ra, dec, size[unit]
21:32:03, -12:50:42, 10m
21:30:03, -12:45:42, 5s
First line search spectra inside a circle of 10 arcmin from the center position
(21:32:03, -12:50:42), in the second line circle radious is 5 arcsec.
Query is limited to the first occurring restriction between:
1) no more than 1000 spectra per query , 2) no more than 1000 command line
In "single" and "file" query type modality only one query at time is allowed.
This means that if more than one query session comes to the system any previous query will
In "batch" query type up to five query per session are permitted.
With the single and the file query
the user can use
a basket like system to accumulate data of interest
that he can save during
navigation or at its end before exiting.
Collected data have session ownership and are available for the current
browser session: therefore collected data must be saved before leaving
the site or closing the browser.
At the bottom of the left side menu, a button "see your collection" is
always present for data saving and inspecting purposes.
By summarizing, the
tool must be used if you are interested
in extracting byurakan image portions with all the spectra included;
explore tool must be used if you are interested in investigating
a visual image and spectra.