Foreground star ? unreported supernova
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by
bluemagi
Blue star appears in skyview and here,but not on the SDSS picture. Shouldn't it show up on the SDSS if its a foreground star?
Posted
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by
c_cld
in response to bluemagi's comment.
Good catch: it's likely a #SNe (supernova) not recorded in Vizier, of which host is a starforming galaxy SDSS J111933.80+254348.5 at redshift 0.091
http://skyserver.sdss.org/dr12/en/tools/explore/Summary.aspx?id=1237667429032067112 .
From DECaLS viewer:
Source RA,Dec = 169.8916, 25.7296
Source type: P
Mags: g=19.99, r=20.02, z=21.57
Brick: 1698p257, Objid:
Number of exposures: g=2, r=2, z=1
and from FITS header of http://portal.nersc.gov/project/cosmo/data/legacysurvey/dr2/coadd/169/1698p257/decals-1698p257-image-g.fits :
FILTERX = 'g '
DATEOBS1= '2015-04-12T02:48:09.482' / DATE-OBS for the first image in the stack
DATEOBS2= '2015-04-12T02:53:09.672' / DATE-OBS for the last image in the stack
Likely too old for having a confirmation by a follow up spectrum now a year after imaging 😦
Posted
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bluemagi
Thanks, Even if it is to old to follow up on. Its still interesting and its the first time in the zoo I've seen one. I did see the 1987a from our backyard so I saw the real thing.
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Budgieye
moderator
Ooooh! did you see SN1987 without binoculars?
There are links to supernova in SDSS here
4.1 Supernova in Talk, Forum, SDSS The Legacy Survey: Stripe 82, and Galaxy Zoo: The Hunt for Supernova. BBC Stargazing Live Snapshot Supernova http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=4&comment_id=53d8b997db90c7673f00101d
Posted
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bluemagi
Yes, we saw SN1987 without binoculars. It was the first time the Magellanic cloud had a star we could see. Usually the clouds are just like a dusty blob. If you really want to see the night sky you have to come to the southern hemisphere and especially in winter.
Posted