Quasars plugin
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| + | | 0.12.0 | ||
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Revision as of 18:17, 31 January 2013
Contents |
Description
The Quasars plugin provides visualization of some quasars brighter than 16 visual magnitude. A catalogue of quasars compiled from "Quasars and Active Galactic Nuclei" (13th Ed.) (Veron+ 2010).
Example (3C 249.1, also known as LEDA 2821945 or 4C 77.09):
Using the Quasars plugin
- Enable the tool by clicking the tool-bar button "Load at startup"
- Find the quasar by their designation (3C 249.1 as example)
Catalog of quasars
You can modify the catalog.json file manually using a text editor. If you are using Windows, it is strongly recommended to use an advanced text editor such as Notepad++ to avoid problems with end-of-line characters. (It will also color the JSON code and make it easier to read.)
Warning: Before editing your catalog.json, make a backup copy. Leaving out the smallest detail (such as a comma or forgetting to close a curly bracket) will prevent Stellarium from starting.
The path to the directory which contains catalog.json is something like:
- C:\Users\UserName\AppData\Roaming\Stellarium\modules\Quasars (Windows Vista, Windows 7)
- C:\Documents and Settings\UserName\Application Data\Stellarium\modules\Quasars (Windows XP)
- HomeDirectory/Library/Preferences/Stellarium/modules/Quasars (Mac OS X)
- ~/.stellarium/modules/Quasars (Linux)
(Note that this is a hidden folder, so in order to find it you may need to change your computer's settings to display hidden files and folders.)
Format of catalog
To add a new quasar, open a new line after line 5 and paste the following, note commas and brackets, they are important:
"Quasar designation":
{
"RA": "Right ascension (J2000)",
"DE": "Declination (J2000)",
"Amag": value of absolute magnitude,
"Vmag": value of visual magnitude,
"z": value of Z (redshift),
"bV": value of B-V colour
},
For example, record for 3C 249.1:
"3C 249.1":
{
"RA": "11h04m13.8s",
"DE": "+76d58m58s",
"Amag": -25.1,
"Vmag": 15.72,
"z": 0.313,
"bV": -0.02
},
Version history
| Plug-in version | Stellarium version | Significant changes |
|---|---|---|
| 0.1.1 | 0.11.2 | First public version of plugin |
| 0.1.2 | 0.11.3 | Fixed few bugs (stabilization of code) |
| 0.1.4 | 0.11.4 | Added GUI to plug-in |
| 0.1.5 | 0.12.0 | Use new rendering engine of core |
| 0.1.5 | 0.12.1 |
How you can help
We are welcome bug reports, feature requests and feedback through the usual channels (trackers, forums and so on).
