User manual

objects in a list. The list may be defined by a selection of objects in a catalogue plane of
the stack, or as a set of interactively 'tagged' objects. Aladin will generate as many views
(see 5.1.2) as there are objects in the list.
Example:
Suppose you wish to create thumbnail images of
all the objects that may be planetary nebulae in
the central region of the field of the comas
cluster:
 Load a DSS of the field, and overlay a
Simbad plane
 Select sources that are indicated as possible
Planetary Nebulae by using the search box in
the lower right of the main window. Simply
type “PN?” in the text box and press GO. This
selects all sources indicated as PN? in the
Simbad plane.
 Create thumbnail images of all these sources
via the Image->Thumbnail view generator
menu item
The generated thumbnail views are automatically 'locked', which means that they do not
zoom or pan in concert with other views, this is indicated by the small padlock symbol
in the lower left of each thumbnail view (see 5.1.2 – locked views).
Tip : Thumbnail views may be deleted individually (as for any view), and also all of the
'locked' views may be deleted at one time both these options are available by right-
clicking on a view.
Tip : When scrolling though the many views that may be generated by the above
procedure, it is often useful to 'stick' the full field view, so that it remains visible as the
thumbnail views are scrolled.
Thumbnail views of multiple images
Thumbnails may be generated simultaneously for a
number of bands, and be displayed side by side.
For example to compare the thumbnail images for
a set of sources in two images, first select the views
of the two images, then select the desired sources
and generate the thumbnails with Image->
thumbnail view generator. The resulting
thumbnails will be arranged so that the thumbnails
from the two images are shown side by side. The
multi-view options can be altered to facilitate the
comparison, in this case the 2x1 and 2x2 views are
convenient.
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