Author Topic: The Hanny's Voorwerp. (Read 132011 times)

Hanny · « **on:** August 13, 2007, 11:16:40 am »

What's the blue stuff below?

Anyone?

http://cas.sdss.org/astro/en/tools/chart/chart.asp?ra=145.2671505&dec=34.73290502

Palladin · « **Reply #1 on:** August 13, 2007, 11:19:44 am »

looks like a cloud?

serpens · « **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 · « **Reply #3 on:** August 13, 2007, 11:25:24 am »

Thank you Serpens!

Alwaysthinking · « **Reply #4 on:** August 13, 2007, 11:32:15 am »

Some weird little nebula maybe?

mitch.wheat · « **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 · « **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 · « **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'

zookeeperKevin · « **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 · « **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...

Edd · « **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

Hanny · « **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

Edd · « **Reply #12 on:** August 13, 2007, 02:00:39 pm »

Quote from: Hanny on August 13, 2007, 01:51:17 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.

Hanny · « **Reply #13 on:** August 13, 2007, 02:02:27 pm »

Thank you Edd, I actually got that

doomrevival · « **Reply #14 on:** August 13, 2007, 02:05:13 pm »

thanks for that explanation

News:

Author Topic: The Hanny's Voorwerp. (Read 132011 times)

Hanny

The Hanny's Voorwerp.

Palladin

Re: What's the blue stuff below?

serpens

Re: What's the blue stuff below?

Hanny

Re: What's the blue stuff below?

Alwaysthinking

Re: What's the blue stuff below?

mitch.wheat

Re: What's the blue stuff below?

Hanny

Re: What's the blue stuff below?

Edd

Re: What's the blue stuff below?

zookeeperKevin

Re: What's the blue stuff below?

doomrevival

Re: What's the blue stuff below?

Edd

Re: What's the blue stuff below?

Hanny

Re: What's the blue stuff below?

Edd

Re: What's the blue stuff below?

Hanny

Re: What's the blue stuff below?

doomrevival

Re: What's the blue stuff below?