Author Topic: Quasi-Stellar radio sources. Find a Quasar? Post it here!  (Read 287847 times)

bluefar

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #15 on: August 15, 2007, 06:26:27 am »
how about the blue blob I posted once? Although not such a big redshift....
http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=587741709958840329


z=.056, zconf=0.95354
TARGET_QSO_CAP
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bluefar

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #16 on: August 15, 2007, 06:31:13 am »
or maybe this one?
http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=587739131342356491


z=.054, zconf=0.999422, TARGET_GALAXY TARGET_QSO_CAP
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serpens

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #17 on: August 15, 2007, 07:43:53 am »
Bluefar, I'd call them both starburst galaxies.

galaxybabe

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #18 on: August 15, 2007, 10:10:53 am »
Bluefar, I'd call them both starburst galaxies.
OK, how do you tell the difference?
I don't want to make an idiot of myself :(
I don't understand all the boxes, etc., at the SDSS page.
If I post something I just found which said
zStatus EMLINE_XCORR
zWarning AB_INC NOT_GAL 
PrimTarget TARGET_GALAXY 
specClass UNKNOWN
http://cas.sdss.org/astro/en/tools/chart/chart.asp?ra=223.13231562&dec=33.58321931


Please just tell me if I got it wrong, and what to look out for?

Thanks  :)

serpens

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #19 on: August 15, 2007, 10:42:35 am »
Bluefar, I'd call them both starburst galaxies.
OK, how do you tell the difference?
I don't want to make an idiot of myself :(
I don't understand all the boxes, etc., at the SDSS page.
If I post something I just found which said
zStatus EMLINE_XCORR
zWarning AB_INC NOT_GAL 
PrimTarget TARGET_GALAXY 
specClass UNKNOWN
http://cas.sdss.org/astro/en/tools/chart/chart.asp?ra=223.13231562&dec=33.58321931

Please just tell me if I got it wrong, and what to look out for?

Thanks  :)


As for this one, I have no idea. It MIGHT be a quasar, but I'm simply not sure.
Now, about the starburst galaxies. I'm no expert, but both the colour, redshift too low for a quasar and spectra would tell me this. The H, O and N peaks, in the spectrum are characteristic for starburst galaxies as far as I know. But I might be wrong.

Well, take a look at this: http://astrostatistics.psu.edu/datasets/galspec.html  at the starburst galaxies part. I think I was right after all.
« Last Edit: August 15, 2007, 10:44:14 am by serpens »

galaxybabe

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #20 on: August 15, 2007, 11:08:52 am »
OK I guess we're all floundering a bit  :D

Here's something interesting:
zStatus MANUAL_HIC
zWarning AB_INC 
PrimTarget TARGET_QSO_SKIRT 
SecTarget   
eClass 0.207779
emZ 0.127
emConf 0.030217
xcZ 1.089
xcConf 1
PrimTarget TARGET_QSO_CAP 
http://cas.sdss.org/astro/en/tools/chart/chart.asp?ra=52.6235375&dec=-7.54110029&scale=0.049515

Pat

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #21 on: August 15, 2007, 11:30:34 am »
Can we put this one on a sticky page as I forgot about posting the quasars here.

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Pat

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #22 on: August 15, 2007, 12:02:25 pm »
587742012744335378
http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=587742012744335378
This one says quasar, but looks like a disturbed barred galaxy. Not sure what has disturbed it.

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doomrevival

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #23 on: August 15, 2007, 12:05:45 pm »
yeah, not a quasar. z = .171 is too low, and the zconf is fairly good (.9)

could have been disturbed by a dark galaxy (although doesn't look distorted enough for that), or something else in that region. hard to say
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serpens

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #24 on: August 15, 2007, 12:07:27 pm »
yeah, not a quasar. z = .171 is too low, and the zconf is fairly good (.9)

could have been disturbed by a dark galaxy (although doesn't look distorted enough for that), or something else in that region. hard to say
There are actually quasars with lower redshifts, but the problem is that they would be blue and probably bright enough to make the parent galaxy invisible. I'd call this one a simple AGN.

doomrevival

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #25 on: August 15, 2007, 12:15:18 pm »
got ya. thanks
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?

fluffyporcupine

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #26 on: August 15, 2007, 12:39:02 pm »

587739406246674690

This one is marked as a quasar already, so no new disovery  :(

Pat

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doomrevival

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #29 on: August 15, 2007, 02:24:43 pm »
a pink quasar huh? they've gone soft on us...  :P ;D ;D
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?