Radio Galaxy Zoo Talk

ARG00017lt - diffuse emisson in NVSS around spiral?

  • Dolorous_Edd by Dolorous_Edd

    the FR1 double in right center of the picture belong to SDSS J080822.33+390059.1

    enter image description here

    however there is more emission in visible in NVSS to the S

    around SDSS J080823.31+385929.2 - 1237655108895637875

    enter image description here

    enter image description here

    TGSS ( something is visible at noise level in the area of NVSS emission )

    NVSS (black ) on TGSS

    enter image description here

    Pure TGSS

    enter image description here

    Posted

  • ChrisMolloy by ChrisMolloy

    Here's a First TGSS overlay of this ARG field centred on SDSS J080823.31+385929.2, which is SSW of the ARG co-ordinates listed left.

    enter image description here

    The contour overlay image in this post was created from sources, and using methods, described in this RGZ Talk
    thread.
    First in red, TGSS white.

    TGSS emission is very extended and hard to determine host or hosts.

    Posted

  • Dolorous_Edd by Dolorous_Edd

    Chris, can you also do NVSS, please?

    Posted

  • ChrisMolloy by ChrisMolloy in response to Dolorous_Edd's comment.

    Here's the NVSS TGSS contour overlay

    enter image description here

    The contour overlay image in this post was created from sources, and using methods, described in this RGZ Talk
    thread.
    TGSS is white, NVSS cyan.

    Posted

  • Dolorous_Edd by Dolorous_Edd

    maybe try lower noise value? just by eyeballing there is seems to be more emission at the noise level

    NVSS

    enter image description here

    Posted

  • ChrisMolloy by ChrisMolloy

    Here's another image, but this is right at the edge of the margins.

    Tnsignoise = 0.0001 # TGSS noise floor, in sigmas
    Tsf = np.sqrt(1.4) # TGSS contour scale factor
    Tsmooth = 13.0 # sigma for gaussian smoothing (TGSS contours)

    enter image description here

    The contour overlay image in this post was created from sources, and using methods, described in this RGZ Talk
    thread.
    TGSS is white, NVSS cyan.

    Posted

  • ChrisMolloy by ChrisMolloy

    And here's the NVSS with lower noise value.

    enter image description here

    The contour overlay image in this post was created from sources, and using methods, described in this RGZ Talk
    thread.
    TGSS is white, NVSS cyan.

    Posted