New Planetary Nebula?

[avandonk]

How do I check to see if I think I have found a new PN? Is there a list of all known PN's?

Bert

[astroron]

Bert,Try this one.
http://www.astro.washington.edu/users/balick/PNIC/
Also this may help (http://www.astro.washington.edu/users/balick/PNIC/)
http://www.astronomy-mall.com/Adventures.In.Deep.Space/abellpn.htm

[Robh]

Hi Bert,

Presumably, you have approximate coordinates for the object.
Go to the SIMBAD database and search by coordinates (Coordinate Query).
http://simbad.u-strasbg.fr/simbad/sim-fcoo

You might want to broaden the search radius to say 2 degrees. Then sort the objects by type (select an arrow under Otype). The PNs should all group together. Will probably have all the NGC and IC PNs but not sure how all-inclusive the database is.

Regards, Rob

[avandonk]

I checked at the first site after converting to Galactic Coordinates and it is not listed there.

I can only see it in HA an NII not OIII. It is very dim 20 mag or dimmer. It does not show up on DSS-2-red. It is a nice annulus about 90'' outer diameter. It is not visible in a deep RGB.

Below is a screen capture in NII.

Bert

[AstroJunk]

Odd that it should not show up in OIII, which is normally typical of PNs. Try here: http://www.blackskies.org/imageidx.htm Turns out there is an exclusive set of peeps finding these things.

Thanks for sharing your adventure and good luck:thumbsup:

[Merlin66]

Anything in Aladin/ Simbad???
http://simbad.u-strasbg.fr/simbad/sim-fid

[avandonk]

Nothing that matches its position. I am sure it is an undiscovered PN as the foreground stars mask the very faint HA/NII signal. Dust could be attenuating any OIII signal. It is only the 3nm filters and fast optics and low noise camera that have revealed it. Four hours of exposure in 3nm NII also helps.

How do I go about reporting it?

Bert

[AstroJunk]

I'd contact the webmaster from Blackskies.org, he seem like the sort of person to know!

[Liz]

Oooh, look forward to hearing the outcome Bert!!

[Nico13]

Nice one Bert,
I hope it's a new one for you, good luck with the reporting.:thumbsup:

[Robh]

Hi Bert,

You might like to read about the discovery and reporting of the Bubble Nebula in Cygnus ...
http://www.starimager.com/Image%20Gallery%20Pages/Hydrogen%20Alpha%20Images/ic%201318_AP_8%20pane%20mosaic_bubb le%20nebula.htm

Regards, Rob

[DavidU]

Nice find Bert, looks like gravitational lensing a tad.

[DavidU]

Like this
http://www.einstein-schrodinger.com/astronomy_pictures/Gravitational_Lens_G2237+0305.jpg

[MrB]

I was thinking the same.
By the way, link is 'Access Forbidden!'

[allan gould]

Best of luck with this Bert.

[trent_julie]

Whats the latest on this Bert?

[avandonk]

In the process of working out how to report it and get it confirmed.

I checked all the data I have. It seems that there are quite a few stars that are in front? of the HA/NII ring and mask its existence. It was only the 3nm filters that attenuated these stars enough so that the ring of the PN was more obvious.

I can just see it on the DSS images because I know it is there.

Bert

[avandonk]

I contacted the Yahoo group Deepskyhunters. It turns out it is a known PN.

It was a worthwhile exercise as I now know more about checking data bases.

Here is an animated gif with an image from SuperCOSMOS H-alpha Survey and my image. 5MB

http://d1355990.i49.quadrahosting.com.au/2013_04/NPN_2.gif



SuperCOSMOS H-alpha Survey here

http://www-wfau.roe.ac.uk/sss/halpha/hapixel.html




The MASH catalogue of Planetary Nebula here

http://vizier.u-strasbg.fr/vizier/MASH/


Bert

[Merlin66]

Bert,
I made enquiries with CDS on your behalf....just received the following reply:

First, you should check that the object is not yet listed in a known list of Planetary Nebulae. You can search for example SIMBAD by coordinates and see if a known object is found :
http://simbad.u-strasbg.fr/simbad/sim-fcoo (http://simbad.u-strasbg.fr/simbad/sim-fcoo)
Also, you can check in a catalogue of known planetary nebulae in VizieR, for example :
http://vizier.u-strasbg.fr/viz-bin/VizieR-3?-source=V/127A (http://vizier.u-strasbg.fr/viz-bin/VizieR-3?-source=V/127A)
You can use the Aladin sky atlas :
http://aladin.u-strasbg.fr/java/nph-aladin.pl?frame=downloading (http://aladin.u-strasbg.fr/java/nph-aladin.pl?frame=downloading)
And check if the object is visible in other Halpha surveys (e.g. Image Servers> Others> Supercosmos Halpha)
I also CC this mail to Prof. Parker who has extensive knowledge of planetary nebulae discovery, and can probably assist you further. I am not sure the IAU Astronomical Telegrams are relevant for announcing PNe discoveries http://www.cbat.eps.harvard.edu/index.html (http://www.cbat.eps.harvard.edu/index.html)
Best regards,
--
Sebastien Derriere

[trent_julie]

Sorry to hear it Bert. At least you got something out of the exercise

[AstroJunk]

A top independent discovery and a great adventure, well done!