Q.: When I use a NED Form with scrollable lists
of options, the default is always preset to a particular option. This
forces me to exclude that option each time I use that list. Is there
a way to have the list defaults in NED query pages automatically
cleared of options?
A.: This is the default behavior of NED (and any
other Web site) when it is accessed with Internet Explorer: IE always
highlights the first entry of each list it displays. If you access
NED using Netscape Navigator, Firefox, Safari, or most other Web browsers,
the default action is to display lists with no selections chosen.
Unfortunately, this is a feature of Internet Explorer that we cannot
easily program around, but we are working toward a solution.
Q.: I have a list of thousands of objects which I'd like to run
through NED. What is the easiest way to do this?
A.: There are at least three methods that you should consider.
The NED Batch functionality is completely replaced and improved with more
capabilities, by the following services:
Another option is to submit multiple URLs via "wget", "curl", or a similar
download program designed to work with URLs. NED uses the HTTP "get"
protocol whenever possible with query filters and options encoded as
simple URL name/value pairs in the form "&name=value".
In this case, you will have to substitute a plus sign "+" for a space,
and the string "%2B" for a plus sign if either of these symbols appears
in a name you submit. For example, the name "SDSS J122653.91+333057.6"
Here are some other examples.
1) Retrieve basic data for Arp 220 and display it as a bar-separated
2) Search for objects within 1.0 arcmin of Arp 220, sort them by their
distances from Arp 220, and display their basic data as a tab-separated
3) Do the same 1.0-arcmin search, but from Arp 220's equatorial position for
J2000.0, 15h34m57.1s, +23d30m11s:
4) Retrieve photometric data for Arp 220 as a text table with bar-separated fields:
Many URLs like these may be put into a file named, for example,
"getNEDdata.001". "wget" can then retrieve NED's data with a command like:
wget --continue --input-file=getNEDdata.001 --output-document=NEDdata.001
Note, too, that NED's data can be formatted as XML "Virtual Observatory"
tables (VOTables). The first example URL above would return NED's data in
XML format by substituting "&of=ascii_bar" with "&of=xml_main":
Web-based Tools NED VO Services, Chapter 18 of
The National Virtual Observatory: Tools and Techniques for Astronomical
Research has more examples and detailed explanations for using NED's
Please note that NED's ability to support high volume/speed automated queries
is currently limited. We ask that you adhere to the
NED Guidelines for Automated Queries.
Thank you for your cooperation.