Galaxy Zoo Talk

what is going on at Galaxy Zoo?

  • liometopum by liometopum

    I have been away a few days and now there are all sorts of changes.

    Clumpy?? What does that mean?
    I cannot access SkyServer to look at any image, as there is no objectID number, and in one case, the option to go to SkyServer was not available. It takes the fun out it all.

    What is going on?

    Posted

  • ElisabethB by ElisabethB moderator

    We are classifying a new set of images from Hubble. Here's some more background info : http://blog.galaxyzoo.org/2015/03/27/new-images-on-galaxy-zoo-part-1/

    And yes, since almost all of these images are out of the SDSS footprint, that means no links to extra data ! Quite a challenge ! 😄

    Posted

  • liometopum by liometopum

    Does this mean we are done with the SDSS project?

    Posted

  • Capella05 by Capella05 moderator

    No, it will be back in a few months, once the Hubble images are classified 😃

    It is not unusual for us to classify different surveys from time too time 😃

    Posted

  • vrooje by vrooje admin, scientist

    I should note that you can always check SkyServer to see if a galaxy image is available in SDSS and, if so, what it looks like in that survey. As @ElisabethB notes, some of the galaxies are in SDSS, and some aren't.

    The way to check is to use a URL like:

    http://skyserver.sdss.org/dr8/en/tools/chart/navi.asp?ra=189.3186404&dec=62.2785482

    where you modify the URL to include the RA and DEC as shown on the object's page here on Talk.
    The image of this galaxy in SDSS looks like:

    AGZ00080vb in SDSS

    ...and we thought the Hubble image was a fuzzy blob! 😃

    We don't make these links automatically for the volunteers only because we don't want to confuse any newcomers regarding Hubble versus SDSS; but it's still sometimes very illuminating to see how much better Hubble does because it's above the atmosphere.

    Posted

  • Budgieye by Budgieye moderator

    Yes, there is usually nothing to see in the SDSS image, and usually no ObjID number, so there is no NED link . But it is amazing to think that Hubble and Sloane telescope are the size size, yet look at the difference.

    Posted

  • klmasters by klmasters scientist, admin

    If only we could launch the SDSS telescope into space! Big effect from the atmosphere. 😃

    Posted

  • liometopum by liometopum

    It appears that in this current Galaxy Zoo project we have been assigned the task pf classifying both the Hubble Deep Field and the Chandra Deep Field South.

    As per Wikipedia:

    two fields of 10' by 16'; one centered on the Hubble Deep Field North (12h 36m 55s, +62° 14m 15s) and the other on the Chandra Deep Field South (3h 32m 30s, -27° 48m 20s). The two GOODS fields are the most data-rich areas of the sky in terms of depth and wavelength coverage.

    Those are the coordinates ranges I see all the time. So, is this correct: have we been assigned the Hubble Deep Field and the Chandra Deep Field South?

    Does this project include images from the Hubble Ultra-Deep Field?

    is there anything else?

    Thanks.

    Posted

  • vrooje by vrooje admin, scientist

    Yes, we are classifying images from the GOODS survey, and also from the more recent CANDELS survey which observes (in part) in the GOODS fields.

    I don't believe we have any HUDF images, however.

    Cheers,
    -Brooke

    Posted

  • Peter_Dzwig by Peter_Dzwig

    I thought there were some HUDF images. To be a bit more precise: I seem to recall that I have had one or two images which when I feed the RA, Dec into NED give me a H-UDF ident, with SR set to 0.1min. So they would be candidates for the same obj.

    I can't remember which ones but if I find any more I will post it/them.

    Posted

  • Peter_Dzwig by Peter_Dzwig in response to liometopum's comment.

    For example:

    http://www.galaxyzoo.org/#/examine/AGZ00084z1

    See also: http://talk.galaxyzoo.org/#/boards/BGZ0000007/discussions/DGZ0001e7f

    Posted

  • c_cld by c_cld

    Example of cutout in HDF-north field http://www.galaxyzoo.org/#/examine/AGZ0007z6j

    Ned ID: HDF:iw3 0832 0544

    AGZ0007z6j

    Don't know instrument/ filters/ stretch& mapping RGB ? :\

    what are the raw fits files ?

    Even in GOODS see color differences varying on size cutout

    http://archive.stsci.edu/eidol.php?POS=189.1535525+62.2294917&resolver=Resolve&SIZE=4.&outputformat=HTML_Table

    and

    http://archive.stsci.edu/eidol.php?POS=189.1535525+62.2294917&resolver=Resolve&SIZE=6.&outputformat=HTML_Table

    Posted