Author Topic: Oddballs- Post your weird pics here!  (Read 1139315 times)

zutopian

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Re: Oddballs- Post your weird pics here!
« Reply #10800 on: June 15, 2014, 07:37:31 am »
Can a galaxy with an r-band (integrated, model) magnitude of only 17.60 have a nucleus so point-like and so bright that it generates diffspikes (diffraction spikes) in an SDSS image?

Check out SDSS J145854.05+051133.5 (DR7 ObjId 587736545774076154, DR8/9 1237662266998980792); first as a Quench Project object (AGS0000432)*, then DR7, and DR9:







The spectrum shows very strong H-alpha (and [NII]?) emission, but not exceptionally so:



What about nearby (bright) stars, do they have diffspikes with the same orientation? How about nearby galaxies with bright nuclei? Here is the field**, with 'our galaxy' in the center; I'll look at each of the marked objects below (the DR9 image of 'our galaxy' - same scale - is to the right of each line):






Maybe I should do an OOTD on this, and similar galaxies? What do you think?

* not previously posted in the GZ forum before
** I forgot to mark the boundaries of the Fields; however, all the marked objects - and 'our galaxy' - are in the same Field

I found following object with faint diffraction spike, but it is in a different field.:


http://skyserver.sdss3.org/public/en/tools/explore/summary.aspx?id=1237659145633398789 

« Last Edit: June 17, 2014, 03:35:52 am by zutopian »

planetaryscience

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Re: Oddballs- Post your weird pics here!
« Reply #10801 on: June 17, 2014, 12:43:42 am »

Interesting object visible in Dr8 but not Dr7. Cosmic ray? Supernova? Asteroid? What is it?
I like to find asteroids and galaxy mergers- but all galaxies are still fine to me.

zutopian

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Re: Oddballs- Post your weird pics here!
« Reply #10802 on: June 17, 2014, 03:40:23 am »

1237680191513690186

I found this object via disk detective- during a dispute over whether it was a star or galaxy. I thought I'd look in the skyserver images to see what it was, and found this. Is this a quasar? What's that blue object to the upper left- an asteroid overlapping the galaxy? A voorwerpje? Artifact?  ???

DR8 says GALAXY, but there is no spectrum. NED also says Galaxy, namely 2MASX J22400602-0356496. 
PhotoZ is 0.195473 according to DR8 !
In conclusion, it is likely a galaxy. I guess, that it has an AGN.

zutopian

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Re: Oddballs- Post your weird pics here!
« Reply #10803 on: June 17, 2014, 03:52:35 am »
Strange artifact, near SDSS J152201.77+120402.4:



Curiously, the red object isn't visible in DR7 !

PS: I copied this post to the topic "Say hello to DR8".: http://www.galaxyzooforum.org/index.php?topic=278752.30
« Last Edit: June 17, 2014, 04:51:14 am by zutopian »

zutopian

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Re: Oddballs- Post your weird pics here!
« Reply #10804 on: June 17, 2014, 05:08:58 am »

Interesting object visible in Dr8 but not Dr7. Cosmic ray? Supernova? Asteroid? What is it?

I copied this post to the topic "Say hello to DR8".: http://www.galaxyzooforum.org/index.php?topic=278752.30

JeanTate

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Re: Oddballs- Post your weird pics here!
« Reply #10805 on: June 17, 2014, 04:57:42 pm »


SDSS J084115.09+075810.1 DR10 link.

Strange red streak ...

elizabeth

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Re: Oddballs- Post your weird pics here!
« Reply #10806 on: June 22, 2014, 06:40:46 pm »

planetaryscience

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Re: Oddballs- Post your weird pics here!
« Reply #10807 on: June 22, 2014, 07:08:29 pm »
I've seen this artifact/glitch on multiple occasions. Similar to the 'edge of chip' glitch in Hubble images, the SDSS telescope occasionally encounters an area of sky where the images appear to be odd (such as the edge of a field, a satellite, or, in this case, a diffraction spike from 4.9-magnitude 63 Aurigae) and the diffraction spike or whatever somehow causes an individual line of pixels to be blended across the screen. I'm not an expert on the telescope's technical stuff, but that's the best explanation I can think of.
I like to find asteroids and galaxy mergers- but all galaxies are still fine to me.

planetaryscience

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Re: Oddballs- Post your weird pics here!
« Reply #10808 on: July 07, 2014, 01:01:30 am »

SN 1993J

I posted this several months ago, on the discussion of this object and the apparent ring of material around it. Nothing particularly new happened in the time in between then and now, except that I became more learned and less, admittedly, arrogant on the situation.

The supernova PTF09dah, more commonly known as SN 1993J. The supernova hasn't been heavily observed or researched. It's a type II supernova from early 2009. Unlike most supernovae, this one was found on SDSS images, as the object you see above.

What is interesting is the ring around the object. As Paul Rogers said, it's much too far to see planetary nebulae from, and everything suggests that it's part of the irregular galaxy PGC 214865, but again what is the ring of material? There aren't any known artifacts that would cause that, and it's too unlikely that that's just a coincidental ring superimposed on a much more distant nova.


I think the only explanation would be that the given supernova is not within the other galaxy, but instead inside of our own. Possibly in the halo, or some other place distant enough not to be extremely bright, but enough for a planetary nebula to be visible.
I like to find asteroids and galaxy mergers- but all galaxies are still fine to me.

paulrogers

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Re: Oddballs- Post your weird pics here!
« Reply #10809 on: July 07, 2014, 06:53:49 am »
Skyserver reports no spectra.   I'd like to see some good spectral studies, using a slit spectrometer rather than a point source spectrometer, such as used by SDSS, with the slit across the "visible object(s) in various orientations.  To do Science we need data.  We don't have enough data.

Dolorous Edd

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Re: Oddballs- Post your weird pics here!
« Reply #10810 on: July 08, 2014, 07:10:50 am »


This thing has caught my eye
Is it a normal galaxy distorted by nearby star? or two stars?
http://skyserver.sdss3.org/public/en/tools/explore/summary.aspx?id=0x112d0e792059002d&spec=&apid=
SDSS J135748.70+535419.0 Type Galaxy
DR7 ID: 587735664768385057
DR10 ID: 1237661385993289773
« Last Edit: July 08, 2014, 07:38:58 am by Dolorous Edd »

planetaryscience

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Re: Oddballs- Post your weird pics here!
« Reply #10811 on: July 08, 2014, 01:03:21 pm »


This thing has caught my eye
Is it a normal galaxy distorted by nearby star? or two stars?
http://skyserver.sdss3.org/public/en/tools/explore/summary.aspx?id=0x112d0e792059002d&spec=&apid=
SDSS J135748.70+535419.0 Type Galaxy
DR7 ID: 587735664768385057
DR10 ID: 1237661385993289773
Looks like 2 stars caught by an artifact that I literally explained 3-4 posts ago. ::)
I like to find asteroids and galaxy mergers- but all galaxies are still fine to me.