Target description
Description
A text file with target names or positions can be loaded onto the server and the query is executed for each of them in turn. Constraints in the other input fields are taken into account.
Each target must be placed on a separate line, coordinate values must be separated by a tab or space(s).
Units
unitless
Examples
Textfile with the content:
M87
12:30:31.25 12:25:26.9
187.630187836999994 12.4241224771999992
', TITLE, 'File upload')"
>
File upload
|
Description
Position of the search. If a precise point is given, then a boxsearch with the size given in the Search Box field is executed. It is however also possible to exactly specify ranges or regions with the .., the < or the > operators.
Unit
either degrees or hours [deg or hours]. Values without colon are interpreted as decimal degrees.
Examples
00:42:44.324 +41:16:08.53
10.684683 41.269036
10..20 >40
', TITLE, 'RA Dec')"
>
RA Dec
|
Description
Position of the search. If a precise point is given, then a boxsearch with the size given in the Search Box field is executed. It is however also possible to exactly specify ranges or regions with the .., the < or the > operators.
Unit
degrees.
Examples
209.022900788 -19.4794454628
0..360 >60
', TITLE, 'Galactic coordinates')"
>
Galactic coordinates
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Description
Position of the search. If a precise point is given, then a boxsearch with the size given in the Search Box field is executed. It is however also possible to exactly specify ranges or regions with the .., the < or the > operators.
Unit
degrees.
Examples
82.8875673848 -28.7278978021
0..360 >60
', TITLE, 'Ecliptic coordinates')"
>
Ecliptic coordinates
|
Description
If a precise point is given, either by entering a target name or a coordinate a box search is executed around that point. If a range of coordinates (via .., < or >) is specified, the search box field is ignored. In Dec/Lat direction, the size of the search box is adapted to be approximately square at all declinations and latitudes. A special treatment is applied to the poles.
Unit
degrees minutes seconds [dd mm ss]
Examples
00:10:00
', TITLE, 'Search box')"
>
Search box
|
Description
Although a pixel will have a certain scale on the sky (see Pixel Scale), the actual physical resolution, i.e. the capability to separate two close-by point sources, depends on several factors amongs which is the diameter of the telescope. Several Hubble cameras, and particularly WFPC2, provide undersampled images.
Unit
arcsec
Examples
<0.07
', TITLE, 'Spatial resolution')"
>
Spatial resolution
|
Description
Planets or other Solar System bodies are moving fast over the sky so that the telescope has to slew in order to keep them centered on the image. This flag allows one to search only for observations in which the telescope was slewing.
Unit
unitless
Examples
None
', TITLE, 'Moving objects')"
>
Moving objects only
|
| Energy |
Description
The query will return any image or spectrum whose wavelength coverage intersects with the value or range given in this field. For filter combinations, we compute the central wavelength and the bandwidth values from the values of the individual filters. Alternatively one or more bands can be chosen from this list:
Halpha, U, B, V, R, I, J, Jbroad, H, K, L, M, HeI, HeI-C, FeII, FeII-C, Paschen-Alpha, Paschen-Alpha-C, Millimeter, Infrared, Optical, Ultraviolet.
Unit
nm
Examples
<600
400..900
U
U or V or B', TITLE, 'Wavelength or band')"
>
Wavelength or band
|
Description
The wavelength throughput curve can be characterized by its central wavelength and its bandwidth. For filter combinations, we compute these values from the values of the individual filters.
Unit
nm
Examples
<500
400..900
', TITLE, 'Bandwidth')"
>
Bandwidth
|
Description
If the name of the optical element (or parts of it) are known directly, they can be queried for here.
Unit
unitless
Examples
F160W
F1*W
G*
', TITLE, 'Filter/Grism/Prism')"
>
Filter/Grism/Prism
|
Description
Unit
unitless
Examples
', TITLE, 'Optical element type')"
>
Optical element type
|
Description
Although a pixel will correspond to a certain wavelength range, the actual physical resolution, i.e. the capability to separate two close-by lines, depends on several factors and is in general different of the wavelength scale. Note that for symmetry, also images get assigned a Spectral Resolution which is equivalent to the full-width half maximum of the throughput curve.
Unit
nm
Examples
<200
', TITLE, 'Spectral resolution')"
>
Spectral resolution
|
Description
The resolving power is defined as deltaLambda/Lambda where lambda is a typical wavelength in the throughput (e.g. the Central Wavelength) and deltaLambda is the Spectral Resolution at this wavelength.
Unit
unitless
Examples
>10000
100..300
', TITLE, 'Resolving power')"
>
Spectral resolving power
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|