Author Topic: The Hanny's Voorwerp.  (Read 106347 times)

Hanny

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The Hanny's Voorwerp.
« on: August 13, 2007, 11:16:40 am »
« Last Edit: February 08, 2008, 01:57:07 pm by Hanny »

Palladin

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Re: What's the blue stuff below?
« Reply #1 on: August 13, 2007, 11:19:44 am »
looks like a cloud?

serpens

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Re: What's the blue stuff below?
« Reply #2 on: August 13, 2007, 11:23:17 am »
This is very weird, I've never seen anything like this in SDSS. You should try to bring the expert's attention here, Edd or one of the Zookeepers for example.

Hanny

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Re: What's the blue stuff below?
« Reply #3 on: August 13, 2007, 11:25:24 am »
Thank you Serpens! :)

Alwaysthinking

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Re: What's the blue stuff below?
« Reply #4 on: August 13, 2007, 11:32:15 am »
Some weird little nebula maybe?

mitch.wheat

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Re: What's the blue stuff below?
« Reply #5 on: August 13, 2007, 11:37:37 am »
As serpens mentioned it would be worth getting an expert opinion. I haven't seen any gas that shows up with quite that blue colour. (unfortunately there is no spectra associated with it).

Hanny

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Re: What's the blue stuff below?
« Reply #6 on: August 13, 2007, 11:40:19 am »
Thanks guys, you've been really helpful! I mailed it to Edd and the team ;)

Edd

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Re: What's the blue stuff below?
« Reply #7 on: August 13, 2007, 12:01:00 pm »
Erm. Well, my best guess, and the best guess of someone else I pulled in from the next office, is either some irregular galaxy or a nebula, but it is a weird colour - unexpectedly faint in r. I'll give zookeepers another poke towards it.

edit: coming back to this post after a long time just as I thought it was worth mentioning that the 'someone else I pulled in' is now around here under the name of 'bamford' :)
« Last Edit: March 07, 2008, 12:53:04 pm by Edd »
When I look up at the night sky and think about the billions of stars out there, I think to myself: I'm amazing. - Peter Serafinowicz

zookeeperKevin

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Re: What's the blue stuff below?
« Reply #8 on: August 13, 2007, 12:12:35 pm »
Weird. Looks like a camera defect to me since it only appears in one filter....

doomrevival

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Re: What's the blue stuff below?
« Reply #9 on: August 13, 2007, 12:14:53 pm »
i suppose it is truly deserving to be placed in the weird and wonderful category... :)
The question is not how far.  The question is... do you possess the constitution, the depth of faith, to go as far is as needed...

It has to start someplace, it has to start sometime.  What better place than here, what better time than now?

Edd

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Re: What's the blue stuff below?
« Reply #10 on: August 13, 2007, 12:33:33 pm »
uiz image here (rather than gri). I think there's a maybe a detection in the blue (u) and definitely part of it in the i (green), so I'm not convinced it's something in the g only. I may be imagining it though :)

When I look up at the night sky and think about the billions of stars out there, I think to myself: I'm amazing. - Peter Serafinowicz

Hanny

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Re: What's the blue stuff below?
« Reply #11 on: August 13, 2007, 01:51:17 pm »
Thanks guys, I really don't know what you're talking about (Edd)  ;)
But we agree on one thing: it's weird  :P

Edd

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Re: What's the blue stuff below?
« Reply #12 on: August 13, 2007, 02:00:39 pm »
Thanks guys, I really don't know what you're talking about (Edd)  ;)
SDSS sees in five colours (u,g,r,i and z) and computer monitors only do red, green and blue. The usual images make g blue, r green and i blue, but I switched some round to see the u and z instead, making u blue, i green and z red. The weird thing about this object is that the detection was pretty much only in the g band, rendered blue in your original image, but I thought there might be more hints in the others - and I think you can see a faint blue triangle there.

So I suspect it's real, but I don't really have a good idea what it actually is.
When I look up at the night sky and think about the billions of stars out there, I think to myself: I'm amazing. - Peter Serafinowicz

Hanny

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Re: What's the blue stuff below?
« Reply #13 on: August 13, 2007, 02:02:27 pm »
Thank you Edd, I actually got that :D

doomrevival

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Re: What's the blue stuff below?
« Reply #14 on: August 13, 2007, 02:05:13 pm »
thanks for that explanation
The question is not how far.  The question is... do you possess the constitution, the depth of faith, to go as far is as needed...

It has to start someplace, it has to start sometime.  What better place than here, what better time than now?