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Urgent ! Need some help with tasks !

  1. Feb 26, 2013 #1
    Hello Astro community, I really need help with few assignments!!

    First one would be about Supernova:
    In a distant galaxy a supernova flash occured. When supernova reached luminosity maximum, galaxy apparent magnitude
    was 17,6. Before the supernova flash the galaxy apparent magnitude was 18,0. What was the supernova's apparent magnitude at it's luminosity maximum?

    Could you help me solve this and explain it to me ?

    Karma !
     
  2. jcsd
  3. Feb 26, 2013 #2
  4. Feb 26, 2013 #3
    I'm sorry I did a mistake in the text, theres not luminosity mentioned.

    In a distant galaxy a supernova flash occured. When supernova reached brightness maximum, galaxy apparent magnitude
    was 17,6. Before the supernova flash the galaxy apparent magnitude was 18,0. What was the supernova's apparent magnitude at it's brightness maximum?


    What I'm trying to say is that theres no luminosity mentioned, only apparent magnitude. So I'm not sure if the luminosity and mass relation would help in this case.

    In short : When the supernova flashed the galaxy had 17.6 apparent magnitude, before the flash it was 18. And I need to find apparent magnitude of the supernova when flash occured ( supernova reached max)

    L.K.
     
  5. Feb 26, 2013 #4

    Borek

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    Staff: Mentor

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