Galaxy Zoo Talk

Why so blue?

  • Ghost_Sheep_SWR by Ghost_Sheep_SWR

    Wondering why the object at top middle is so blue in DECaLS DR2 in comparison with regular brown in SDSS

    SDSS J154952.97+050827.3

    http://legacysurvey.org/viewer?ra=237.4708&dec=5.1410&zoom=16&layer=decals-dr2

    enter image description here
    DECaLS DR2

    enter image description here
    SDSS

    Posted

  • Ghost_Sheep_SWR by Ghost_Sheep_SWR

    Well that got swamped fast

    Right, DECaLS DR2 magnitudes; number of exposures g=2 r=2 z=5

    g mag = 21.48, r mag = 21.60, z mag = 21.52

    Blue (g band) only very slightly brighter, so object shouldn't be that blue-colored in image, at least it isn't that 'blue' really.

    Posted

  • Budgieye by Budgieye moderator

    um... um... um.... good question

    Posted

  • Ghost_Sheep_SWR by Ghost_Sheep_SWR

    Thanks

    A good question is always the best start 😃

    Maybe something almost in front in SDSS at 2 o'clock, or background noise..

    Posted