Outflow ?

by bluemagi

Quasar 1237667912753020966 SDSS: QSO Broadline Z:1.347, Simbad: Quasar Z:1.3683. Looks like a possible outflow. Cheers, Magi

Posted July 26, 2017 4:04 AM

by Budgieye moderator

Fascinating. Thank you for posting, bluemagi

Not a quasar spectrum, there is no hydrogen alpha peak. Not a blue "pea", no OIII oxygen peaks. It looks like O star spectrum or a white dwarf star spectrum, so maybe an extreme starburst area? Or is it a foreground star in our own galaxy? Something shining from behind? The spectrum cables got mixed up?

It is almost impossible to estimate a redshift on a hot spectrum like this, and the software is having trouble with the absorption lines too. The NED value of z=0.032 sounds reasonable.

enter image description here

http://skyserver.sdss.org/dr12/en/tools/explore/summary.aspx?id=1237667912753020966+

enter image description here

http://skyserver.sdss.org/dr12/en/tools/explore/summary.aspx?id=1237667912753020966+

photoz 0.030517
zErr 0.007528

![white dwarf](http://skyservice.pha.jhu.edu/DR9/ImgCutout/getjpeg.aspx?ra=194.89415094&dec=27.91455375&scale=0.2&width=200&height=200&opt=G) **white dwarf star**

![blue star](http://skyservice.pha.jhu.edu/DR9/ImgCutout/getjpeg.aspx?ra=170.45646973&dec=26.75981805&scale=0.2&width=200&height=200&opt=G) **blue star**

Comparison with target spectral chart in the middle.

enter image description here

I think the target spectrum is redshifted.

Does anyone have any opinions? Do I need to bring in a scientist?

enter image description here PanSTARRS

http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=215.740509218%2C+22.91150&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=240&output_size=0&verbose=0&autoscale=99.500000&catlist=

Reading

Galaxy Redshift Chart https://talk.galaxyzoo.org/#/boards/BGZ0000007/discussions/DGZ0000ulp?page=2

Spectra guide for SDSS images in Galaxy Zoo Talk https://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000ulp?page=3&comment_id=53fef2ee3d5a77490c0001b6

Posted July 26, 2017 6:43 AM

by c_cld

DR7 seems to have a better mapping lines fit:

SpecObjID = 784423535190736896 plate 2786 mjd 54540 fiberid 610 (reprocessed on releases DR8- 9 - 10 -11- 12 with warning "negative emission")

http://cas.sdss.org/dr7/en/tools/explore/obj.asp?ra=215.740509231&dec=22.911507265

SpecObjID = 784423535190736896

previously posted in GZ forum
Oddballs- Post your weird pics here!
« Reply #5242 on: March 29, 2009, 10:40:24 pm »
http://cas.sdss.org/dr7/en/tools/quicklook/quickobj.asp?id=587742191528116273

Posted July 26, 2017 9:07 AM

by c_cld

Showed for "classify" on https://talk.galaxyzoo.org/#/subjects/AGZ00033vr

and commented https://talk.galaxyzoo.org/#/boards/BGZ0000004/discussions/DGZ10068rs

Posted July 26, 2017 9:43 AM

by mlpeck

I know that galaxy. It has one of the finest A+K (poststarburst) spectra in the local universe. The DR8+ spectro pipeline totally botched the redshift. The DR7 value is the correct one.

It's a known K+A galaxy and was studied by Melnick & dePropris (2013). It's also on the MaNGA master target list, so there's about a 1 in 4 chance that it might get observed again.

To add to the mystery if you click on the position of the second spectrum at lower right in the finder chart image nothing shows up in navigate. But it is on skyserver and looks like an ordinary starforming region and not at all post-starbursty (shown below).

enter image description here

Link to skyserver interactive spectrum: https://dr13.sdss.org/optical/spectrum/view?id=26380&plate=2787&mjd=54552&fiberid=342

Posted July 26, 2017 3:05 PM