Hubble legacy archive download

The photometric results are measured in 0. The catalog was led by Katherine Whitaker. The HLF V2. These datasets were updated and astrometrically matched to the V1. As noted above the V2. Now you should have three colored images like this.

I moved them out of alignment for demonstration. Now start changing the opacity of the layers until you have something like this:. Good luck, and have fun! If you make something you are particularly proud of feel free to send it to me. You can find a contact form on my website Gadgetzz. Which is also where I first published this tutorial. While Mr. This Hubble Space Telescope image represents the largest, most comprehensive "history book" of galaxies in the universe.

The image, a combination of nearly 7, separate Hubble exposures, represents 16 years' worth of observations. The wavelength range stretches from ultraviolet to near-infrared light, capturing all the features of galaxy assembly over time.

The image mosaic presents a wide portrait of the distant universe and contains roughly , galaxies. They stretch back through The tiny, faint, most distant galaxies in the image are similar to the seedling villages from which today's great galaxy star-cities grew.

The faintest and farthest galaxies are just one ten-billionth the brightness of what the human eye can see. The wider view contains about 30 times as many galaxies as in the Hubble Ultra Deep Field, taken in The new portrait, a mosaic of multiple snapshots, covers almost the width of the full Moon. Lying in this region is the XDF, which penetrated deeper into space than this legacy field view.

However, the XDF field covers less than one-tenth of the full Moon's diameter. Next Hubble Legacy Field Crop. Click on a table column heading to sort by that value e. Clicking again on the same heading reverses the sort order. If there are more than 20 images found, there are controls to go through the table by pages or to jump to the first or last page. You can also change to 10, 50, or results per page.

Brief definitions of the table columns are provided at the bottom of the page; you can also get tool tips by placing your cursor on the column heading. By default not all of the many table columns are displayed. See instructions on the bottom right to add, remove, or reposition columns. Note that if you customize the view, your settings are retained as long as you use the same computer and web browser.

A subset of the inventory can be selected using the empty boxes under each column heading to filter out certain rows of the table e.

Columns with character strings support exact matches or wildcard matches. An exclamation mark "! Move the cursor over an empty box for instructions on the filter formats. Table rows can be selected by clicking on them, and selected rows are highlighted. Clicking a selected row toggles the selection, so the row becomes unselected and unhighlighted. Datasets can also be selected in the images and footprints views described below; datasets selected in any view are also selected and highlighted in the other views.

The Add selection to cart button can be used to add the selected rows to the cart for downloading. Note that if the table has been filtered, only selected rows included in the filtering are added to the cart.

The Reset selection button unselects all the selected rows. The row selection can also be used for sorting and filtering the table. By default the selected rows are mixed in with the unselected rows, with the sort order determined by other parameters, but there are four possible choices:.

When the selected data are shown first and the table is sorted by a column, each group of rows selected and unselected is sorted separately. When rows are selected, they are highlighted but do not immediately move e. But when you move to a new page, the selected rows do get resorted and moved. So when selected rows are being shown first, you may notice that when you click a row, move forward a page, and then move back, the selected row has moved.

This is even more noticeable when only selected or non-selected rows are shown; then rows may disappear altogether after paging forward and back. If you find this behavior disconcerting, you can use the default "Mixed" view, where whether a row is selected does not affect its position or visibility in the table. Dataset selection is integrated across the Inventory, Images and Footprint views, so datasets selected in one view are highlighted in all views. The table shown in the Footprints view is now identical to that in the Inventory view and selections are treated consistently across all views.

The Images and Inventory views always match, so the top row in the inventory table appears first on the corresponding images page.

Each image is annotated with some of the relevant information from the inventory table, including the target name, instrument, filter, etc. There are also links to add the datasets to the cart and to bring up the interactive display. By default the images are full-frame previews reduced to a size of x pixels. This is not to say they were bad at it, of course. Remember Photoshop 4. Good old A fun task can be to try and find your own take on an old image, perhaps by adding newer observations to it or combining the filters in a way you find personally appealing.

Another option is an all sky search. This will yield all available data from that instrument. Fair warning: The HLA becomes quite slow to load because of this, requiring some patience. For reasons unknown to me, Chrome is noticeably slower.

I like to sort the results by date, filter them down to one year, switch to results per page, and browse by thumbnail. Filtering the results to only include a single year allows the page to load much more quickly. The fits2web image viewer, accessible via the Interactive Display link under each thumbnail, allow one to brighten and preview anything that looks interesting, saving oodles of time that might otherwise be wasted downloading what turn out to be huge duds.

One of the most confusing aspects of the HLA indeed, any science archive is confronting a multitude of new acronyms to learn. Hopefully I can explain away some of the confusion. Knowing what each means can make it feel a little more comfortable. I will focus on the four imaging cameras for now. Some of the newer instruments have a number of imaging channels. Instrument first, followed by a slash and the channel.

NICMOS in particular has a lineup of anomalies and artifacts that are especially difficult to deal with and WFPC2 pronounced wiff-pick two , if you are wondering has its special staircase or stealth bomber shape which can also be a major turnoff.