Page History
Excerpt | ||
---|---|---|
| ||
Search VO collections, the Hubble Source Catalog, and create DOIs for data you publish |
Panel | ||||||
---|---|---|---|---|---|---|
| ||||||
On this page...
|
Search a List of Targets
It is possible to search MAST for multiple targets at once, by first uploading list of target names and coordinates. The steps are the following:
Instruction | Notes | |||
---|---|---|---|---|
1 | Prepare a list of targets on your local machine, following the formatting rules below. This minimal example file (right) uses a list of names and coordinates of 4 Galactic globular clusters.
| |||
2 | Click the Upload Target List button. | |||
3 | Enter the location of your target list in the upload dialog box, and click "Upload" | |||
4 | Select one or more of your targets in the results table. | |||
5 | Click the cross-match button. | |||
6 | Select a MAST collection against which to cross-match the coordinates of you targets. Also select a search radius about the targets. Then click the Cross Match button. |
Tip |
---|
It is possible to perform other actions with user tables beyond cross-matching with an uploaded table, such as creating new table columns or plots of column values. |
Note |
---|
Uploading a large list of targets, and then cross-matching against a large catalog such as All Observations, may take a long time to execute, and may return an unwieldy list of matches. |
Formatting Rules for Uploads
The Upload tool can import custom tables in two file formats: VOTABLE and CSV. See the description of VOTable file format. A CSV-formatted table should be prepared with the following in mind:
- A line is a comment if it begins with a
#
. An exception to this is that before the header line you may specify a column datatype line with#@
, then a comma-separated list of types. - Allowed types are:
int
,float
,string
,ra
anddec
, with the latter two being interpreted from either decimal or sexagesimal coordinates. If no datatypes are specified, the software will attempt to determine them. - The first un-commented line defines the headers for the columns.
- Right ascension should be titled as:
RA
orRAJ2000
. - Declination should be titled as:
DEC
orDECJ2000
. - Footprints should be titled as:
s_region
orregionSTCS
. - Any number of subsequent rows may be defined, although one should exercise caution with trying to load large numbers of rows.