Supernova ?
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bluemagi
This galaxy is a starburst with High Hydrogen on spectrum. When you look at sdss there is a large green star at the bottom right of core. In the original photo there is no sign of it.
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Budgieye
moderator
Hmm, supernova are usually blue-green, with softer edges. Its extreme green looks a bit like a cosmic ray hit.
Nothing in NED
Search Talk and Forum with 1237663783656488960 -- nothing
SDSS dr9
1237663783656489097
SDSS dr7
http://cas.sdss.org/dr7/en/tools/explore/obj.asp?id=588015508728447105
It would be needed to be looked at with a FITS file to see if it is in only the green (r) image
Post in Unreported supernova #SNe https://talk.galaxyzoo.org/#/boards/BGZ0000007/discussions/DGZ00016qc
more info
4.1 Supernovae in Talk, Forum, SDSS The Legacy Survey: Stripe 82, and Galaxy Zoo: The Hunt for Supernova http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=4&comment_id=53d8b997db90c7673f00101d
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bluemagi
The brightness of the green bothered me to. I thought it might be an asteroid but I couldn't find any evidence of that.
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Budgieye
moderator
I think it should be investigated, and not just thrown out until we know for sure. Who can do FITS files? I should learn but it always seems to be 3rd on my list.
Galaxy is z=0.11
It reminds me of this one
alk: Ejected black hole? or luminous blue variable star (LBV) erupting for decades since 1950, followed by a Type IIn SN in 2001?http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000ila?page=1&comment_id=546ee14f415ac12f66000ee4 http://mnras.oxfordjournals.org/content/445/1/515
see
7.7 data analysis, FITS images http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=7&comment_id=53d8bba40d43f776b00010b4
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bluemagi
I am totally inept at computers. Sorry I can't help more.
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Maybe on skyview different filters from SDSS
http://skyview.gsfc.nasa.gov/current/cgi/query.pl
I think i've also got some SNe's here and there, what does the 'e' stand for btw SNe?
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c_cld
Following Budgieye's process there are a few checks to begin with:
- Remember SDSS thumbnails and "navi" are cutouts in one frame among possible many shots during multiple runs, in particular in this "stripe82" region. So the first thing is to look at original frames.
- For AGZ000ANTG the "examine" gives you SDSS DR9 run, camcol, field : 4263, 3, 54 used to see the frame by DR12 Science Archive Server (SAS)
http://mirror.sdss3.org/fields/runCamcolField?run=4263&camcol=3&field=54 - Looking at this frame, no green blob shows up. The DR9 SDSS thumbnail is not from that frame.
- You have to search in others frames listed in the result of querying the "coverage check" http://mirror.sdss3.org/coverageCheck
- Among the many listed there, only one shows the green blob:
http://mirror.sdss3.org/fields/runCamcolField?run=4145&camcol=3&field=49
which allows you to download the FITS files for the five u,g,r,i,z bands. - Using your preferred FITS viewer (DS9, Aladin desktop,...) and scaling and stretching the image, you can readily see the blob as typical bright squares cosmic rays hits in r-band only.
No further doubts about this #artifact of #cosmicrays 😃
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c_cld
in response to Ghost_Sheep_SWR's comment.
what does the 'e' stand for btw SNe?
from latin nova, plural novae 😃
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Aaah! So for these would be better #SNc (candidate) 😉
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Budgieye
moderator
Thank you for the analysis c_cld
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bluemagi
Thanks
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