Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Please help. Supernovae database?

  1. Dec 12, 2006 #1
    of course I know that google knows the answer to any question, but it seems that there are limits.

    So when I want to test a certain hypothesis I need to have an overview of all known supernovaes, distance, size, etc, dated from say 30-50,000 years ago. So I typed in super nova index and that sort of thinks, and the result was millions of them, pop groups, games, clubs, anything, the whole nine yards except a single super nova index. There must be an answer to the question, but how to ask to correct question.

    Can anyone help?
  2. jcsd
  3. Dec 12, 2006 #2
    The NASA/IPAC EXTRAGALACTIC DATABASE (maintained by CalTech) is a great tool for stuff like this, and just in general an amazing catalog.


    Try their All-Sky Search (http://nedwww.ipac.caltech.edu/forms/byparams.html) and Limit it to Supernovae...when i did it i came up with 3744 objects. Good Luck.

    Edit: Here is my search results just by limiting to supernovae only:


    *Note this is for supernovae, not supernovae remnants, thats another category you can select in the Advanced All-Sky Search.
    Last edited: Dec 12, 2006
  4. Dec 13, 2006 #3


    User Avatar
    Science Advisor

  5. Dec 13, 2006 #4
    That's great, guys. Thanks very much. Now, if I only could figure out distance and date of explosion from those data.

    You see, I'm looking for this one:


    Nice piece of scientific method, observations, a clever hypothesis worked out which leads to a prediction of a supernova 41,000 years ago at a distance of 250 light years. But what about the last phase? Testing the prediction? So that's why I asked those questions.
  6. Dec 13, 2006 #5


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Well, getting a handle on some (historical, older) SNe in the LMC likely won't help you, but there was a very interesting discovery (last year?) of faint light echos which, when analysed, pointed to old SNe (and gave pretty tightly constrained dates for when the were seen - on Earth - to go bang).
  7. Dec 14, 2006 #6
    Thanks Nereid, good to see you.

    Interesting indeed, unfortunately the numbers are some orders of magnitude different. With more googling I found:


    but the link doesn't work for me. Perhaps some insider knows the status of that page?
  8. Dec 14, 2006 #7
    With some persistence: http://www.astro.uiuc.edu/~rosanina/preprints/n206.pdf

    Spot on, however:

    That's kilo-parsec, innit? That would get us at ~160,000 light years?. 3 orders of magnitude too far away. But if we can spot them at that distance at that age, shouldn't know about one within the correct parameters, 250 light years, 41 ky ago?
  9. Dec 14, 2006 #8
    Why does it suggest this? Isn't it much more plausible that a Lunar metorite hit the Earth? Or at least a similar object of solar system origin? That would be more plausible in my opinion, in which case you might be chasing a white rabbit.

    Is there any more information on this? I would like to know if there is some more compelling reasoning behind this hypothesis, or if I missed something in the original article that I should have picked up on.

    I will google and come back later...

    EDIT: I read the whole original article... I am also confused by the iron grains, wouldn't they have had to have started out being much bigger in order to make it through the atmosphere intact? This would require a second ejection of densely packed material to conveniently line up with the Earth.
    Last edited: Dec 14, 2006
  10. Dec 18, 2006 #9
    Didn't find anything much except two copies of the original article...
  11. Dec 19, 2006 #10
    Thanks for your efforts,

    Would it indicate that the chances of finding Supernovae remains within the constraints of the date and distance parameters are very remote. Would that mean that the Firestone hypothesis can be considered falsified?
  12. Dec 20, 2006 #11


    User Avatar
    Science Advisor
    Gold Member
    2015 Award

    I think it's too early to dismiss the Firestone hypothesis. The error bars are pretty forgiving, from what I've seen.
  13. Dec 20, 2006 #12

    If you are looking for SNRs, you have to be looking for websites that supports telescopes that detects in the x-ray part of the electromagnetic spectrum. A good telescope to look at is the Chandra Telescope.
    The BIGGEST help I got about SNRs came from this Chandra website:


    Now you could explore around here if you want, it tells you a LOT about SNRs. If you want to get an index of certain SNRs, click on "Supernova remnants in our Galaxy and Magellanic Clouds." It has a sum of all known SNRs recorded by Chandra Telescope in our galaxy and magellanic clouds. I've worked with this website for almost six months now and it hasn't let me down.

    If you are looking for resources on certain SNR parameters (ex: distance, size, temperature, etc), you could look around any Chandra websites, OR (what I'm doing right now) download a software called "ds9" (Deep Space 9) and do some research yourself!!
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Please help. Supernovae database?
  1. Book about astrology (Replies: 25)

  2. Supernova Remnant Help (Replies: 2)