Cone search of catalogues provided by Virtual Observatory.
munipack cone [.. options ..] [--] RA DEC munipack cone [--list-catalogues | --list-servers]
Search a selected catalogue provided by Virtual observatory interface (VO-capable cone search) with following features:
Southern object coordinates starts with minus sign which can be recognised, by the parsing routine, as an option or a switch. To prevent the confusion, we must separate options and parameters by double-dash [--]. Than recognition of the coordinates will work as expected.
A typical message when the problem is occurred:
$ munipack cone 245.9 -26.5 Unknown option '26' Usage: munipack cone ...
And can be easy solved as
$ munipack cone -- 245.9 -26.5
Central Virtual Observatory catalogue site (VizieR) is maintained by Centre de Données astronomiques de Strasbourg and provided as a VizieR service. The service is mirrored by other sites. The option --service offers possibility to select an appropriate mirror.
Sometimes connection can not be established on first attempt or a network connection is down, in this case, the connection will be repeated for a while.
On input, no files are expected. Virtual Observatory is connected via network.
On output, results of the cone search are saved to a file.
One can found usefull a conversion of UCAC4 magnitudes to Johnson BVRI photometry system. cone utility with --Johnson-patch has included the transformation derived by Lupton (2005).
Some servers supports additional parameters for search, output form and etc. For instance, there is a way how to limit magnitudes in V filter for stars brighter than eleven:
munipack cone --par 'Vmag=<11' -- 245.9 -26.5
The magnitude interval, as well as another quantity, is set by double dots:
munipack cone --par 'Vmag=11..12' -- 245.9 -26.5
Additional info can be found in VizieR utilitiy vizquery and constrain syntax documentation.
See Common options for input/output filenames.
Magnitude limits by --magmin, --magmax adjusts magnitudes in the sort column.
The list of available catalogues is limited. Another required catalogue can be added by this way:
munipack cone --id 'J/A+A/544/A31' -r 1 -- 104 -16
Does cone search of a default catalogue (UCAC4) pointed on Trifid nebula (α = 270.675°, δ = -22.972°):
$ munipack cone -- 270.675 -22.972
Do cone search of a default catalogue (UCAC4) pointed on globular cluster M13 with star magnitude limitation for a small telescope
$ munipack cone --magmin 10 --magmax 15 -- 250.423 36.461
Search GSC catalogue within Pleiades (α = 92.4°, δ = 24.1°) with cone radius of 0.2°:
$ munipack cone -c GSC -r 0.2 92.4 24.1
Cone search for negative coordinates needs separate parameters and options with double-dash:
$ munipack cone -c UCAC5 -r 0.2 -- 245.9 -26.5
Virtual Observatory, Common options, vizquery documentation.