Note that in all searches ( with the exception of "Derived Spectral Properties" )
the character "%" will match
Zero or more characters ( numbers,
symbols, letters ). In other words
722% will match 722,7220,7221,...,7228,7229
HD9312% will match HD93129 and HD93218 and HD93129A and HD93218B
In addition most searches allow the user to narrow down the results by
limiting the detector and gratings to only certain combinations. This is typically
useful when searching over a large coordinate area, or selecting on all
obsids ( i.e. to find all ACIS/HETG observations ). These options can
generally be ignored for other searches due to the limited number of
gratings observations, see the
trends page for more.
Target Name Search
Search by extraction target name(s), to search on more than a single name at a time enter each name
separated by a new line.
During the V&V process the scientist verifies that automatic processing has
identified the appropriate target for the extraction and ensures that the name matches the names stored in the
TGCat database, which include:
- TGCat name. Chosen by the TGCat team
- SIMBAD Primary Identifier. This is the ID that
shows at the top of any simbad query result
This search will return any
TGCat source that has the given string within it, meaning that wildcards
are implied at the begining and ending of the entry value. Additionaly any whitespace is both searched
for and compressed, i.e. when in doubt include spaces
tau - will match "V* CM Tau" ( SIMBAD primary ID ) as well as "Proxima Centauri" and or course "tau CMa"
HD93129 - does not return any matches, while
HD 93129 - returns HD 93129AB
The
TGCat name search provides the option to match the input to a
SIMBAD
identifier for the target. If the input is one of the
SIMBAD Identifiers
for a target, the coordinates of that target, as recorded in the
SIMBAD
catalog, will be passed back to
TGCat to be matched within the "search radius" chosen. The following URL search is performed
for each query:
http://simbad.u-strasbg.fr/simbad/sim-script?script=output%20console=off%20script=off
%0a%20format%20object%20%22%25COO(d;A,D),%25IDLIST(1)%22%0aquery%20id%20{TARGET_NAME}
where {TARGET_NAME} is what the user has entered into the field.
An example of the output when searching for "crab":
http://simbad.u-strasbg.fr/simbad/sim-script?script=output%20console=off%20script=off
%0a%20format%20object%20%22%25COO(d;A,D),%25IDLIST(1)%22%0aquery%20id%20crab :
083.63321,+22.01447,V* CM Tau
if using a 2 arcmin search radius ( default ), the TGCat database is
then queried on
ra < 83.666543333333 and ra > 83.599876666667 and decl < 22.047803333333 and decl > 21.981136666667
Object Type Search
TGCat stores type information for each source it extracts. At present the only types
stored are
SIMBAD types, but there are
plans for expanding this.
the "primary type" will always be the
SIMBAD primary type.
to select more than one type in a single category press the Control button and select. The numbers that
appear beside each type are the number of sources to which that type is assigned but does not reflect the
number of objects with a particular type as their primary type. There are three types of type searches
that can be done:
- Inclusive: will return all sources that have at least one of the selected types assigned to it
- Exclusive: will return all sources that have all of the selected types assigned to it
- Primary Type: will return all sources that have any of the selected types as their primary id
Coordinate Search
Coordinates can be entered in sexigessimal format or decimal format as per the following:
sexagessimal - 123:45:67.890 or 123 45 67.890 for RA and should be between 000:00:00.00 and 360:00:00.00
for DEC a "+" or "-" can be appended and values should be between -90:00:00.00 and +90:00:00.00
Decimal - 123.4567890 for RA and should be between 0.000 and 360.000
and (+/-)123.4567899 for DEC and should be between -90.000 and +90.000
All coordinates are Galactic J2000 epoch and in the IRCS frame
Spectral Properties Search
Search on derived spectral properties by specifying a min and max for each band/atom. See
Flux Properties Summary for a description of these properties
Obsid Search
All Chandra Observations are marked with a unique
ObsId which can be used to query
for particular observations. This search has two options for specifying obsids:
- entering a comma, space, or new line separated list in the text box marked "Obsid(s):" and/or,
- uploading a file with one obsid per line. Both options are allowed at the same time. If the file being parsed
has characters other than numbers or "%" it will be ignored, however the obsids specified in the text box will still
be searched. One can display all TGCat obsids by entering "%" in the obsid search box.
Arbitrary Search