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Expanded documentation on NED searches #25

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Expanded documentation on NED searches #25

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Expanded documentation on NED searches
gpdf Jan 7, 2022
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28 changes: 20 additions & 8 deletions html/firefly/catalogs.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<!--NewPage-->
<HTML>
Expand Down Expand Up @@ -221,26 +220,39 @@ <h3><A name="nedcatalogs">NED Catalogs</A> -- Overlaying

By clicking on the blue "Catalogs" tab, you are by default dropped
into the interface for searching for catalogs at IRSA. However, you
can pick another tab, "NED", to search for and load a catalog from
NED.<P>
can pick another tab, "NED", to search for and load catalog data from
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... to search for and load objects data from ...

NED.
Using this interface you can superpose NED search results on search
results you've already obtained from other sources.
You then have one-click access to the fully detailed information
from NED on any object returned from such a search.<P>

<img src="img/nedcat.png" width="75%"><P>

This tab allows performing a cone search in the main NED object
catalog around specified coordinates.
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This tab allows performing a cone search in the NED objects directory

As for other catalog searches, you can use an object name in place
of coordinates (note that although NED is used for name resolution,
the actual search then performed on NED is by coordinates, as
opposed to a direct access of the NED object catalog by name).<P>

As for the other catalog searches, the tool pre-fills the target
position with its best guess o the coordinates of the target with
which you have been working. In this case, you are limited to a cone
search, so the next option is the cone search radius. Pick your units
position with its best guess for the coordinates of a target with
which you have already been working.
The next option is the cone search radius. Pick your units
from the pulldown first, and then enter a number; if you enter a
number and then select from the pulldown, it will convert your number
from the old units to the new units. There are both upper and lower
limits to your search radius; it will tell you if you request
something too big or too small. <P>

something too big or too small.<P>

The search results are then shown (and interacted with) in the same
way as the other catalogs described here.<P>

The search results will generally include a column "Details".
(You may have to scroll to the right to see it.)
Clicking on a link in this column takes you directly to the full
NED information display for the selected object, in a new window.<P>

<h3><a name="owncatalogs">Loading your own catalogs</A></h3><P>

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