Author Topic: Let's go Supernova Hunting  (Read 73048 times)

zookeeperChris

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Let's go Supernova Hunting
« on: August 10, 2009, 08:20:36 pm »
We have a special challenge for you this week - Galaxy Zoo is going Supernova Hunting.

A supernova is an exploding star, capable of outshining an entire galaxy. We have a robotic telescope in Palomar, California sending us candidate objects from the galaxies it scans, and a team of Oxford astronomers are on their way to the Canary Islands to follow up the most likely.

The choice of galaxies to follow-up on is in your hands - we'll be posting new data each day, and keeping a running list of those candidates that most Zooites think are likely supernovae. Get clicking...and you might well be the first to discover an exploding star.

Chris

(P.S. This is a prototype of a much larger project so all feedback and comments - good and bad - are of course welcome).



« Last Edit: August 10, 2009, 08:23:54 pm by zookeeperChris »

waveney

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Re: Let's go Supernova Hunting
« Reply #1 on: August 10, 2009, 08:23:13 pm »
Chris, the link is duff...
Join the Irregular Classifiers
We all help at the cutting edge of ignorance.

zookeeperChris

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Re: Let's go Supernova Hunting
« Reply #2 on: August 10, 2009, 08:24:08 pm »
Fixed, thanks.

Chris

Alice

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Re: Let's go Supernova Hunting
« Reply #3 on: August 10, 2009, 08:46:14 pm »
OK, I've read "How to Take Part" a few times and I'm still not quite clear exactly what the "subtraction" image is used for exactly. OK, it's the "new" minus the "reference" - does that mean, for example, that if there is a large-ish blob, it's more likely to be a supernova, or should it be small-ish, or what? Sorry if I'm being daft here, but I'm quite hungry ;D

ElisabethB

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Re: Let's go Supernova Hunting
« Reply #4 on: August 10, 2009, 08:50:11 pm »
I printed everything and I'm going to read it tomorrow and several times over and then I'll give it a try.  ;D


zookeeperChris

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Re: Let's go Supernova Hunting
« Reply #5 on: August 10, 2009, 08:50:40 pm »
It's not the size of the blob that matters - that just tells you about brightness, but whether it's a nice clear star or not.

For a 'true' supernova, the only difference between the reference and new images would be the addition of a bright star - so that's what you should see in the subtraction image (which the tutorial also calls the difference image).

Anything else - multiple changes, a subtraction image that doesn't have a star or so on should be rejected...

Chris

elizabeth

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Re: Let's go Supernova Hunting
« Reply #6 on: August 10, 2009, 09:05:00 pm »
 :) How many images are there?

zookeeperChris

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Re: Let's go Supernova Hunting
« Reply #7 on: August 10, 2009, 09:07:15 pm »
How long is a piece of string?

I think the initial plan is to put up about 7000 from each night's observing, but the more people get involved then the more of the computer's output we can check. There's a hidden feature which is that identifying any image as a supernova will make it more likely to be shown to other Zooites, so we can quickly reach a consensus on anything that looks promising.

Chris

Blackprojects

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Re: Let's go Supernova Hunting
« Reply #8 on: August 10, 2009, 09:08:06 pm »
This REF Number came up and was no images at all.

44701272.

Clicked no and carried onto the next one that came up ok

zookeeperChris

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Re: Let's go Supernova Hunting
« Reply #9 on: August 10, 2009, 09:10:34 pm »
Thanks - will check.

Chris

Alice

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Re: Let's go Supernova Hunting
« Reply #10 on: August 10, 2009, 09:38:28 pm »
What's the "Bad - black/white" stuff about in the tutorial? All the images look black and white to me ;D

Blackprojects

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Re: Let's go Supernova Hunting
« Reply #11 on: August 10, 2009, 09:44:15 pm »
Sorry found 4 more

44706193

44719054

44675758

44717101

All came up as empty as in no images.

Geoff

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Re: Let's go Supernova Hunting
« Reply #12 on: August 10, 2009, 10:36:13 pm »
This REF Number came up and was no images at all.

44701272.

Clicked no and carried onto the next one that came up ok

I don't see any reference numbers? Do you only get these if there's a problem?
  Sometimes I think we're alone. Sometimes I think we're not. In either case, the prospect is staggering!- Arthur C. Clarke

Blackprojects

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Re: Let's go Supernova Hunting
« Reply #13 on: August 10, 2009, 10:46:34 pm »
It seems that way Geoff the REF number comes up above the Area where the Images should be but all that is Displayed is an Empty area.

So I note the REF number down and Carry on!

Next time I get one i will take a Screen Capture or Photo so others can see what I am seeing.

Geoff

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Re: Let's go Supernova Hunting
« Reply #14 on: August 10, 2009, 10:50:26 pm »
O.K. I'm too tired to do this properly so will carry on in the morning after my coffee!
  Sometimes I think we're alone. Sometimes I think we're not. In either case, the prospect is staggering!- Arthur C. Clarke