Recent content by beavez

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    Having Trouble with ISIS Image Subtraction Method?

    Hi I'm not sure if anyone here has used ISIS image subtraction program written by Alard, available online at http://www2.iap.fr/users/alard/package.html, but I'm hoping someone has. I'm currently working on a bit of research that requires PSF matching to work, and this program should easily...
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    ISIS image subtraction program; trouble running

    I am having the same problem! Did you figure it out?? please help!
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    Density of a Star: Calculating Mass & Average Density

    right! i have to integrate over dr... and i should take the volume of the shell . the thank you for your help : )
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    Density of a Star: Calculating Mass & Average Density

    Homework Statement For a star of mass M and radius R, the density increases from the centre to the surface as a function of radial distance r, according to \rho = \rho_{c}[1-(\frac{r}{R})^2] where is the central density constant. a) Find M(r). b) Derive the relation between M and...
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