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2025 June 13: The HLA cart and HLA footprint viewer no longer work. Minimal
maintenance is being done on the HLA interface because all HLA
functionality and data products will soon be available in the new MAST
Hubble search interface.
At that point,
the HLA interface will
be retired. Note that the HLA products will still be available.
Click on data links to immediately download data.
If you need footprints, we recommend using the
MAST Portal.
Note that both the Portal and the new search interface also provide access to the
Hubble Advanced Products (HAP), which include HLA-style products for more recent
observations.
The HLA contains no observations acquired after 2017 October 1.
Highlighted HLA Features:
- Use of footprints to show how Hubble images are positioned on the sky,
- the inventory to provide information about the exposure, and
- the interactive display to take a quick look at the image.
This display can be reproduced in the HLA by using the following steps.
Clicking on the image above will go directly to the interactive display
for the color image of the selected footprint which is outlined in yellow.
- Type hla.stsci.edu into your browser.
Click on the "Enter Site here" button. Type "30 dor" into the empty search box and hit the "return/enter" key or click on the "Search" button.
- Click on the "Footprint" tab.
- Click in the WFPC2 footprint just to the right of the nucleus (i.e., the
footprint highlighted in yellow in the image above).
- Click on the Inventory tab.
- Change "Show selected rows:" to "First" to see information about the images you selected.
- Below each column header is a box to enter filtering constraints. Enter 4 in the constraint
box below the Level column header to filter out the other
levels and only show the color images.
- Click on the Images Tab.
- Scroll down to the "30DOR-Knot3 (color)" image, it's on the 2nd page. Click on the
Interactive Display
link to examine the image in more detail.
Additional Tricks:
- When moving your mouse cursor around in the footprint display, the RA/DEC of the cursor is displayed in the upper right hand corner of the
display.
- One can also zoom in/out in the footprint display by adding a radius qualifier on the search box. In this case,
our search radius is 0.2 degrees. To zoom in one can add "r=0.05" to the search box or add "r=.5" to zoom out.
The r=.5 option is particularly interesting (though takes
longer) since the very busy region to the bottom right is SN 1987A (find relevant images by entering "*sn*"
in the target column in the inventory).
- To reduce the number of visits in the footprint display, one can filter out individual instruments
via the controls at the left of the display and clicking "Submit".
Previous HLA Images of the Month
