A new transient discovered in SDSS data
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by
KWillett
scientist, admin, translator
M. Koss and collaborators (including GZ science team member Kevin Schawinski) have just submitted a new paper on a transient object discovered in a nearby dwarf galaxy. Originally thought to be either a supernova or a QSO, they suggest that it is a luminous blue variable (LBV) star that has been erupting for decades, since at least 1950, and then FOLLOWED by a supernova in 2001.
http://arxiv.org/abs/1401.6798v1
A very interesting object, and one that was discussed by GZ volunteers back on the forum in 2011.
http://www.galaxyzooforum.org/index.php?topic=279576.msg569089#msg569089
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by
JeanTate
in response to KWillett's comment.
Cool! 😃
If history were re-run, is it possible that this could have been the Galaxy Zoo's "Hanny's Voorwerp"?
Posted
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by
ElisabethB
moderator
in response to JeanTate's comment.
Not sure what you mean by this ? 😄
Posted
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by
JeanTate
in response to ElisabethB's comment.
In an alternate universe, with a Galaxy Zoo, in the early days of that innovative project, an intrepid zooite named ElisabethC spotted this strange object, a 'star' with an odd spectrum, 'in' a relatively nearby (cosmologically speaking) dwarf galaxy. She posted, in this alternate universe's GZ forum, "What's this blue star, with the odd spectrum; anyone?" zkKelvin immediately recognized it as extremely unusual, and ... a year later ElisabethC got to attend the annual EUAS meeting in Brugees, to 'woman' the Galaxy Zoo booth, and give a keynote speech on how she came to discover what had, by then, become widely known as "Els' Vreemd Ster" ... 😛
Sorta like that ... 😉 {<- that's a wink smilie}
Posted
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by
zutopian
in response to KWillett's comment.
A very interesting object, and one that was discussed by GZ volunteers back on the forum in 2011.
Well, it had been discussed before, namely in 2009 in following topic on the GZ forum.:
Whats going on here?:
http://www.galaxyzooforum.org/index.php?topic=276107.msg650511#msg650511In the paper there is given following statement.:
Finally, SDSS1133 was listed as a possible “Voorwerp” candidate for a giant ionized cloud (Keel et al. 2012).
http://arxiv.org/abs/1401.6798
Curiously, they say "Voorwerp" candidate, but as far as I know, it was listed actually as voorwerpje candidate!
Posted
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JeanTate
I wrote an OOTD* about this, specifically about the fact that it had been posted by many zooites, many times, over a long period of time: Thursday, 6 February 2014: SDSS1133, the Galaxy Zoo discovery that wasn't
If history had been different, perhaps SDSS1133 might have called "Stellar's Star" or "Sayonave's Supernova" 😛
*Object of the Day, a very popular section of the Galaxy Zoo forum, for GZ Talk readers who don't know
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zutopian
The "accepted for publication" version of the paper showed up on arxiv today.: http://arxiv.org/abs/1401.6798
Besides there is following media release, which is dated 19.11.:
A jettisoned black hole?
The researchers have been allocated observation time with the Hubble Space Telescope in October 2015 in order to measure this spectrum more precisely.
https://www.ethz.ch/en/news-and-events/eth-news/news/2014/11/a-jettisoned-black-hole.html
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by
DZM
admin
This is getting some widespread notice!
This article was the #1 thing on the front page of Reddit this morning.
Posted
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by
Budgieye
moderator
Ejected black hole?
or
luminous blue variable star (LBV) erupting for decades since 1950, followed by a Type IIn SN in 2001?
bright blue object http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237658802571968533
bright blue object http://cas.sdss.org/dr7/en/tools/explore/obj.asp?id=587733081347063838SDSS J113323.97+550415.8 or SDSS 1133 or SDSS1133
Does anyone know the AGZ.... number?
galaxy http://cas.sdss.org/dr7/en/tools/explore/obj.asp?id=587733081347063839 SDSS J113323.47+550420.6
http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237658802571968534
The galaxy has a spectrum showing intense star formation.
#UGCA 239
The spectrum is not like a quasar, which has a large rise in the blue end. It is more like a supernova.
Forum Re: Wanted! Galaxy pairs which overlap but are not merging. posted by c_cld in 2011 http://www.galaxyzooforum.org/index.php?topic=6732.msg430743#msg430743
Forum KWillett http://www.galaxyzooforum.org/index.php?topic=279576.msg650441#msg650441 in 2014 "A new paper on this precise object has been submitted to MNRAS. They suggest that it's in fact a luminous blue variable (LBV) star erupting over decades, followed by a supernova explosion in 2001. http://arxiv.org/pdf/1401.6798v1.pdf
"Forum: Thursday, 6 February 2014: SDSS1133, the Galaxy Zoo discovery that wasn't by Jean Tate http://www.galaxyzooforum.org/index.php?topic=281602.0 a lively debate with lots of data.
including post by mkoss http://www.galaxyzooforum.org/index.php?topic=281602.msg652867#msg652867 "he object was still around in 2013, so it wasn't likely a SNe,"Publication: SDSS1133: an unusually persistent transient in a nearby dwarf galaxy Nov 2014 by Michael Koss
, Laura Blecha
, Richard Mushotzky
, Chao Ling Hung
, Sylvain Veilleux
, Benny Trakhtenbrot
, Kevin Schawinski
, Daniel Stern
, Nathan Smith
,Yanxia Li
, Allison Man
, Alexei V. Filippenko
, Jon C. Mauerhan
, Kris Stanek
, and David Sanders
http://mnras.oxfordjournals.org/content/445/1/515 "While this peculiar source displays many of the observational properties expected of a potential black hole recoil candidate, some of the properties could also be explained by a luminous blue variable star (LBV) erupting for decades since 1950, followed by a Type IIn SN in 2001."Animated simulation to support ejected black hole
NASA's Swift Mission Probes an Exotic Object: ‘Kicked’ Black Hole or Mega Star? NASA Goddard https://www.facebook.com/video.php?v=10153321921040898&fref=nfPosted