Author Topic: Suggest a target for spectra!  (Read 16119 times)

Alice

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Re: Suggest a target for spectra!
« Reply #60 on: June 22, 2010, 09:00:39 pm »
I'll ban you if you really want me to, Graham! :D And stand for re-election! :P

I'm not going to discuss moderator issues in public - suffice to say Rick and Bill are both very, very highly regarded by both mods and zookeepers! ;D


Budgieye

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Re: Suggest a target for spectra!
« Reply #62 on: June 22, 2010, 09:31:54 pm »
Perhaps we should keep start of list of objects that we would like a spectrum for.

EigenState

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Re: Suggest a target for spectra!
« Reply #63 on: June 22, 2010, 10:26:28 pm »
Perhaps we should keep start of list of objects that we would like a spectrum for.
Object and reason for wanting the spectrum.  That is, what can one expect to learn from the spectrum that would constitute new knowledge.

New thread, perhaps in the Science Questions board.

c_cld

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Re: Suggest a target for spectra!
« Reply #64 on: March 30, 2011, 04:07:36 pm »
I would like to suggest a QSO/BLAN target which is a candidate lensing another likely QSO or a galaxy.
This new target is 'zCOSMOS 832923'  DR8 1237653665258799415
I've posted it in Possible strong gravitational lenses
with some information known.
We do have a good VLT/Vimos spectra for the range 5505 Ang to 9054 Ang.
But it would be great to disentangle the QSO/BLAGN candidate lens  from the candidate source lensed by having a spectrum in the SDSS range 3900ANg-9150Ang.
With a bluer spectrum we could search for some major lines of the candidate source (likely a QSO or a very compact blue galaxy) which could not be blended with emission lines of the foreground QSO:
these bluer lines are easily visualizable on QSO spectra in SDSS at redshift 2.395
Lya_1216
SiIV_1398
SiIV_OIV_1400
AlIII_1857
CIV_1549
Two lines could be blended between foreground and background objects:
broad MgII_2799 in foreground / CIII_1909 in background (z=1.315 ) .

Any comments are welcome  :)

AHZ200119d  20125813




Perhaps we should keep start of list of objects that we would like a spectrum for.
Object and reason for wanting the spectrum.  That is, what can one expect to learn from the spectrum that would constitute new knowledge.

New thread, perhaps in the Science Questions board.
« Last Edit: January 09, 2012, 03:09:46 pm by c_cld »

c_cld

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Re: Suggest a target for spectra!
« Reply #65 on: October 20, 2013, 08:25:05 am »
QSO pair or lensed?

1237674461485269352 neighbor at left, without photoZ, but in QSO color space


Found possible binary QSO with angular separation= 8.24 arcsec

1237674461485269353 z spec=2.458


 

from CFHTLS image above: hint of a galaxy sticked to the left QSO in need of spectra for both to answer the question... :
« Last Edit: October 20, 2013, 08:27:52 am by c_cld »

zutopian

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Re: Suggest a target for spectra!
« Reply #66 on: October 24, 2013, 04:10:35 pm »
There is just one spectrum available.: It is a QSO. I wonder, if the other 2 objects are also QSOs or stars. Maybe it is a triple Quasar (if the redshifts are same) or a lensed quasar?


http://skyserver.sdss3.org/dr9/en/tools/explore/obj.asp?id=1237661064943042927
http://skyserver.sdss3.org/dr9/en/tools/explore/obj.asp?id=1237661064943042929
http://skyserver.sdss3.org/dr9/en/tools/explore/obj.asp?id=1237661064943042928

c_cld

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Re: Suggest a target for spectra!
« Reply #67 on: October 25, 2013, 03:50:45 pm »
There is just one spectrum available.: It is a QSO. I wonder, if the other 2 objects are also QSOs or stars. Maybe it is a triple Quasar (if the redshifts are same) or a lensed quasar?
http://skyserver.sdss3.org/dr9/en/tools/explore/obj.asp?id=1237661064943042927
http://skyserver.sdss3.org/dr9/en/tools/explore/obj.asp?id=1237661064943042929
http://skyserver.sdss3.org/dr9/en/tools/explore/obj.asp?id=1237661064943042928

The objects 1237661064943042928 and 1237661064943042929 are two stars which are not in a color-color QSO space.
No triple images with central QSO, nor physical  three QSO sources  :'(

c_cld

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Re: Suggest a target for spectra!
« Reply #68 on: October 25, 2013, 03:55:35 pm »
http://talk.spacewarps.org/#/boards/BSW0000005/discussions/DSW0000c1n
possible QSO pair from color-color space but no spectra

1237674460411724146

1237674460411724147

angular separation = 3.244 arcsec

  CFHTLS cutout

from terapix
ugrgririz

 8) 8) 8)
« Last Edit: October 25, 2013, 06:34:58 pm by c_cld »

planetaryscience

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Re: Suggest a target for spectra!
« Reply #69 on: February 03, 2014, 04:24:33 pm »
I was working on the IC catalog thread, trying to get to IC 150 before it was time to finish, when I happened across IC 120's companion galaxy. This galaxy appears similar to a regular irregular galaxy, except it's not 'irregular' in the sense that we know at all. It's completely smooth.



After looking, there's no common type of galaxy like this except Dwarf Spheroidal galaxies, nearby galaxies that have depleted most of their gas and appear more dim in luminosity and are more like spirals and irregulars than ellipticals.

These galaxies are fairly rare, with only 16 known in the universe, and all of these in our own local group. However IC 120, at z=0.016031, is 217,000,000 Light-Years away, much too far to be part of our local group. This little galaxy here may redefine what these galaxies are, but first we need to know if it even is one, and that needs spectra.

If NGC3314 or Kevin or anyone can give spectral analysis on this galaxy- or even just feedback, it would be useful in determining the nature of this odd galaxy
I like to find asteroids and galaxy mergers- but all galaxies are still fine to me.

zutopian

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Re: Suggest a target for spectra!
« Reply #70 on: February 10, 2014, 02:35:17 pm »