Now in Vim, use Load Sky Positions / from local VOTable and browse to find the BL_Lac file, then load it.
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Let us start, as usual, with a set of sky positions, except this time we will not use a URL link, but rather
download to the desktop, then upload to Vim from there. From the Example Tables, select the "38 bright BL_Lac objects", and save the file. You should get a file called "bright_BL_Lac.xml" or something like it.
Now in Vim, use Load Sky Positions / from local VOTable and browse to find the BL_Lac file, then load it. |
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| Now you see the table of BL-Lac objects, as in the screenshot here. We can now ask the NVO Inventory which other catalogs share these same 38 sources. Choose Catalogs / Find Correlated Catalogs and use a radius of 5 arcsec. It may take a minute to come back. |
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| The inventory will send back a list of matching catalogs, and these are put into Vim's catalog cache. Use Catalogs / View Catalog Cache to see the new entries that were found. | |
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| Let us run a proximity search against one of the catalogs. Under Fetch Data / Proximity Search, we can see in the pulldown some of the new catalogs (red box) in addition to the "primary" catalogs that were there before. Choose the GUSBAD gamma-ray-burst catalog, and a large proximity radius (3600 arcseconds). | |
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| Here are the results. Four of the 38 BL-Lac objects have had a gamma-ray burst within one degree. How interesting, to try to decide if this correlation means anything! | |
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