New Images on Galaxy Zoo, Part 1

We’re delighted to announce that we have some new images on Galaxy Zoo for you to classify! There are two sets of new images:

1. Galaxies from the CANDELS survey

2. Galaxies from the GOODS survey

The general look of these images should be quite familiar to our regular classifiers, and we’ve already described them in many previous posts (examples: here, here, and here), so they may not need too much explanation. The only difference for these new images are their sensitivities: the GOODS images are made from more HST orbits and are deeper, so you should be able to better see details in a larger number of galaxies compared to HST.

Comparison of the different sets of images from the GOODS survey taken with the Hubble Space Telescope. The left shows shallower images from GZH with only 2 sets of exposures; the right shows the new, deeper images with 5 sets of exposures now being classified.

The new CANDELS images, however, are slightly shallower than before. The main reason that these are being included is to help us get data measuring the effect of brightness and imaging depth for your crowdsourced classifications. While they aren’t always as visually stunning as nearby SDSS or HST images, getting accurate data is really crucial for the science we want to do on high-redshift objects, and so we hope you’ll give the new images your best efforts.

Images from the CANDELS survey with the Hubble Space Telescope. Left: deeper 5-epoch images already classified in GZ. Right: the shallower 2-epoch images now being classified.

Both of these datasets are relatively small compared to the full Sloan Digital Sky Survey (SDSS) and Hubble Space Telescope (HST) sets that users have helped us with over the last several years. With about 13,000 total images, we hope that they’ll can be finished by the Galaxy Zoo community within a couple months. We already have more sets of data prepared for as soon as these finish – stay tuned for Part 2 coming up shortly!

As always, thanks to everyone for their help – please ask the scientists or moderators here or on Talk if you have any questions!