The VizieR photometry tool allows for easy visualization of photometry points extracted around a given position or object name from photometry-enabled catalogues in VizieR.
The VizieR photometry tool allows for easy visualization of photometry points extracted around a sky position from photometry-enabled catalogues in VizieR. Even when an object name is used as a target, what is returned is just a list of photometry point found within some search radius, and should not be mistaken for an actual energy distribution for the target object: there is no guarantee that all photometry points correspond to the target, especially for extended sources.
The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates: 5 to 30 arsec (risky!).
Some catalogue magnitudes are converted automatically into fluxes using photometric system descriptions in the METAfltr VizieR table.
There is no correction for reddening applied: unless magnitude values in the original catalogue are already corrected for extinction, values will correspond to the observed reddened flux.
The VizieR photometry tool can be embedded in an external web page as a widget. Use the Share link at the top right of the user interface to retrieve the HTML code to copy/paste in your web page.
A couple of parameters to be added in the URL
http://cdsportal.u-strasbg.fr/gadgets/ifr?url=http://cdsxmatch.u-strasbg.fr/widgets/SED_plotter.xml?... allow for customization of the widget to your needs:
sed_max_radius_arcsecallows to specify the maximum search radius (in arcsec) and overrides the default value of 30 arcsec.
sed_additional_paramsallows to restrict the set of VizieR tables taken into consideration as sources of photometry points. The value of is this parameter is a combination of VizieR sources parameters described here. This value must be properly encoded as a URL parameter.
sed_additional_params=-kw.Wavelength%3DIRto the widget URL will restrict the set of tables to those being tagged with the value
IR("infrared") for the Wavelength keyword, as shown in this example.
sed_additional_params=-source%3DII%2F246%2520II%2F328to the widget URL will restrict the set of tables to II/246 (2MASS) and II/328 (AllWISE), as demonstrated in this example..
thumbnail=truewill show only the main panel (example).
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The VizieR photometry tool is developed by Anne-Camille Simon and Thomas Boch.
The VizieR service is developed by Gilles Landais and François Ochsenbein.