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After separating comet and star, the image integration failed

Evan Tsai
in PixInsight
Hi,
After I separating the comet and star, as suggested by Adam's comet tutorial and try to integrate those starless comet images in ImageIntegration process, the console shows an error message "Zero or insignificant signal detected (channel 2)" as attached file.  Those comet images were taken by OSC.  If anyone knows how to fix this, please let me know.

Comments

  • Evan Tsai
    one of the starless image

    starless.JPG
    1348 x 929 - 177K
  • BlockHeadBlockHead
    Does it still give you this error if you turn off "evaluate noise" ?

    Channel "2" is the BLUE layer/channel. Indeed, there probably isn't much there..but it should still average the darn pixels. 

    Let me know...

    -the Blockhead
  • Evan Tsai
    It works! Thanks Adam.
  • Andrea GironesAndrea Girones
    Adam Do you think this comet method could work for the lunar eclipse? I was thinking of trying to shoot a wide field image with Rho Ophiuci and the moon?

  • BlockHeadBlockHead
    Hmm... I not exactly certain. 
    There are different ways to approach the kind of image you are describing.... 
    Can you give me detail on what you want to accomplish?

    -the Blockhead
  • Andrea GironesAndrea Girones
    So I was going to use my ASI2600MC camera and  a 50mm lens tracking for the stars, centred on M4 during the period of totality. I am hoping it will be dark enough to image the Rho Ophiuci area  since the moon will be so dim. Using a 50 MM lens the moon will be in th frame but will move at a different rate than the stars.
    So when I go to stack I will stack the stars  and assume the moon will be blurry. . But I will take some shorter exposures exposed for the moon and then try to blend the moon in with the Rho region. As I type this it does sound crazy…

  • Andrea GironesAndrea Girones
    I have imaged Rho before using a wide angle lens and an astro camera before. The skies need to be dark. Last year I imaged M45 with the eclipsing moon. As the moon got very dark all the stars popped out. However last years moon was only 97% eclipsed and that last bit of light washed out the sky. I am counting on a total eclipse  to darken the sky even more!… 
    By the way. i enjoy all your programs very much  and just upgraded from Fundementasl to Horizona and  love the level of detail and appreciate your thoroughness!
  • Andrea GironesAndrea Girones
    So my plan is to take 120s exposures  to get some nebulosity around Rho and then .5, 1s 2s and 5s exposures for the moon during totality only…. All with an APS-C size sensor and 50mm lens tracking on and equatorial mount, tracking sidereal time…
  • Andrea GironesAndrea Girones
    I have 2 back up plans as well!! As this one may not work…
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