Author Topic: A question, which could lead to a suggestion concerning an SDSS image database  (Read 13491 times)

egalaxy

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hanny...
anyway....
yes that i know. there are nebulae and such. sdss doesnt recognize them.
if you are talking about every single bit of information, and that we should post them.... that will be very hard.

c_cld

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NGC0001 1237663235526623298 SDSS J000715.86+274229.0

NGC0002 1237663235526623612 SDSS J000717.11+274042.0

NGC0003 1237669681725571087 SDSS J000716.79+081805.8

NGC0004 1237669519053291673 SDSS J000724.42+082225.6

NGC0005 1237678807987126341 SDSS J000748.86+352144.1

NGC0006 1237659889192271938 SDSS J000932.68+331831.4

NGC0008 1237678578755829899 SDSS J000845.21+235018.3

NGC0008 1237678578755829899 SDSS J000845.21+235018.3

NGC0008 1237678578755829900 SDSS J000845.64+235018.5

NGC0009 1237678578755895301 SDSS J000854.69+234901.0

NGC0011 1237666185649324049 SDSS J000842.56+372653.9

NGC0012 1237678661424971810 SDSS J000844.74+043645.2

NGC0013 1237680312303812654 SDSS J000847.71+332559.8

NGC0014 1237652944250011685 SDSS J000846.36+154851.3

NGC0014 1237652944250011669 SDSS J000845.58+154840.5

NGC0015 1237679476397441210 SDSS J000902.47+213728.4

NGC0016 1237678790808109187 SDSS J000904.27+274345.9

NGC0018 1237678790808174647 SDSS J000923.00+274354.3

NGC0018 1237678790808174647 SDSS J000923.00+274354.3

NGC0018 1237678790808174646 SDSS J000923.22+274356.3

NGC0019 1237659888655335470 SDSS J001040.88+325858.6

NGC0020 1237659889192271938 SDSS J000932.68+331831.4

NGC0021 1237680312303943788 SDSS J001046.91+332110.2

NGC0022 1237678790808240134 SDSS J000948.20+274956.1

NGC0023 1237663308530253837 SDSS J000953.42+255525.6

NGC0026 1237663308530254008 SDSS J001025.87+254954.8

NGC0027 1237680481415987328 SDSS J001032.76+285946.5

NGC0029 1237680312303943788 SDSS J001046.91+332110.2

NGC0030 1237679476934508627 SDSS J001050.82+215837.5

NGC0030 1237679476934508628 SDSS J001050.54+215838.1

NGC0030 1237679476934508627 SDSS J001050.82+215837.5

NGC0032 1237679502172487752 SDSS J001053.63+184745.6

NGC0033 1237678598628573188 SDSS J001056.88+034035.7

NGC0033 1237678598628573187 SDSS J001056.32+034033.1

NGC0033 1237678598628573188 SDSS J001056.88+034035.7

NGC0036 1237669516369330221 SDSS J001122.29+062321.6

NGC0038 1237679077516640316 SDSS J001146.98-053510.8

NGC0039 1237680484100538421 SDSS J001218.86+310339.9

NGC0041 1237679476934705336 SDSS J001247.95+220124.4

NGC0042 1237679541889990668 SDSS J001256.34+220601.0

NGC0043 1237680333788872876 SDSS J001300.76+305454.9

NGC0044 1237680309619785972 SDSS J001313.29+311710.1

NGC0044 1237680309619785972 SDSS J001313.29+311710.1

NGC0044 1237680309619851270 SDSS J001313.52+311710.9

NGC0046 1237678663036174357 SDSS J001409.89+055915.7


egalaxy

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Please edit your post. there are like, 7 repeated galaxies. 14 18 30 33

garrett_cw

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Thank You, c_cld.  :)
Now Lanky Yanky, is this what you had in mind when you started this thread?
Curtis
"To get along in life you must be very clever or very nice. I've been clever. I recomend nice."

JeanTate

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Please edit your post. there are like, 7 repeated galaxies. 14 18 30 33
c_cld has provided an illustration of one possible implementation of LY's idea; good job c_cld!  ;D

For several NGC objects, there is more than one SDSS object. What to do in those cases? For example, which of the two (or more) SDSS objects should be the one matched with the NGC object (assuming only one is allowed, in this catalog)?

588017949357965355  NGC 5214

Galaxy with horns smoking a big Habana !!

This illustrates another challenge: as I understand it, the two galaxies here are NGC 5214 and NGC 5214A. Will the catalog include both?

And let's not forget that the NGC is not clean. If you're into this kind of thing, this website is a great place to while away a few spare hours: The NGC/IC Project:
Quote
The NGC/IC Project is an attempt to correctly identify all of the original NGC and IC objects, starting with the original discoverer's notes and working forward in time to encompass the work of contemporary astronomers, both professional and amateur, such that the identity of each of the NGC and IC objects is known with as much certainty as we can reasonably bring to it from the existing historical record.

[...]

The data are heterogeneous, to say the least. They are also frequently wrong (not through any fault of Dreyer's; he was a careful and excellect transcriber) and just as frequently contradictory. Many NGC/IC numbers have been found to refer to stars, double stars, or multiple stars, and many NGC/IC positions point to blank regions of sky. There are also many cases of two or more NGC/IC numbers clearly refering to the same object.

c_cld

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Please edit your post. there are like, 7 repeated galaxies. 14 18 30 33
c_cld has provided an illustration of one possible implementation of LY's idea; good job c_cld!  ;D

For several NGC objects, there is more than one SDSS object. What to do in those cases? For example, which of the two (or more) SDSS objects should be the one matched with the NGC object (assuming only one is allowed, in this catalog)?


My post is only a test to get some feedback on what is mandatory/nice to have and doable.
I could
-eliminate the true duplicates (including the same ra,dec on image and DR8 Id)
-make a link to NED within the name "NGCxxxx"
-possibly add the NED link to "NGCxxxx" which is not in the SDSS foot print for keeping the list in order for further survey.

My list is based on catalog VII/239A/icpos History and Accurate Positions for the NGC/IC Objects (Corwin, 2004)  where you have 3 times NGC0008 with different coordinates.

I 'll work Alexandre' case: NGCxxxxA,B,C... another time.

Below some result with NED link:
NGC0047 1237680264001880076 SDSS J001430.62-071003.0

NGC0050 1237680242525732908 SDSS J001444.57-072042.4

NGC0052 1237678602917380146 SDSS J001440.04+183454.7

NGC0054 1237680264001945770 SDSS J001507.65-070623.9

NGC0057 1237678601306832954 SDSS J001530.91+171942.3

JeanTate

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My post is only a test to get some feedback on what is mandatory/nice to have and doable.
I could
-eliminate the true duplicates (including the same ra,dec on image and DR8 Id)
-make a link to NED within the name "NGCxxxx"
-possibly add the NED link to "NGCxxxx" which is not in the SDSS foot print for keeping the list in order for further survey.

My list is based on catalog VII/239A/icpos History and Accurate Positions for the NGC/IC Objects (Corwin, 2004)  where you have 3 times NGC0008 with different coordinates.

Nice!  ;D

The source of that catalog is the very same NGC/IC project I mentioned in my post!  8)

I'm not sure all NGC objects are listed in NED; why would a local star cluster, or asterism, merit an entry in NED (for example)?

Quote
I 'll work Alexandre' case: NGCxxxxA,B,C... another time.

That should be fun.

And again, great work!  :-*

Alice

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I'll just sit back and let c_cld take care of everything ;D

c_cld

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sample of (ra,dec) outside the SDSS DR8 footprint. (more than half from the NGC catalog).
Could be worth to list separately of DR8 imaging list?

NGC0007       null
NGC0010       null
NGC0017       null
NGC0024       null
NGC0025       null
NGC0028       null
NGC0035       null
NGC0037       null
NGC0040       null
NGC0048       null
NGC0049       null
NGC0051       null
NGC0053       null
NGC0055       null
NGC0056       null
NGC0059       null
NGC0061       null
NGC0065       null
NGC0066       null
NGC0073       null
NGC0077       null
NGC0087       null
NGC0088       null
NGC0089       null
NGC0092       null
NGC0098       null
NGC0101       null
NGC0103       null
NGC0104       null
NGC0110       null
NGC0111       null
NGC0115       null
NGC0116       null
NGC0119       null
NGC0121       null
NGC0129       null
NGC0131       null
NGC0133       null
NGC0134       null
NGC0135       null
NGC0136       null
NGC0142       null
NGC0143       null
NGC0144       null
NGC0146       null
NGC0147       null
NGC0148       null
NGC0150       null

LankyYankee

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I'm very glad my suggestion has generated so many good ideas -- my only issue with the way the proposed thread is taking shape is that I think it is important to be able to have more than a single image for a galaxy -- when a galaxy is part of a system or cluster of galaxies, it would be very informative if, in addition to the image of a single galaxy, it includes an image showing that galaxy in relationship to others nearby.

c_cld

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:o How many of these have already been posted in this thread I wonder! ::)

The question is not to search duplicates (or more) but to try to clear up the mess of pics.  :)

The goal is to facilitate the search by an amateur on NGC objects by constellation:

a search like "NGC in Libra" will immediately gives you
-the NGCs names with link to NED
-every pic when clicked leads you to "SEDS page"  to see each object's NGC information page from the Students for the Exploration and Development of Space.
-the DR8 ID with link to the "Explore page"

The Famous Places - NGC Objects said
Quote
Of the 7,800 NGC objects, 591 have been observed by the SDSS.
That was at the DR2's time. Now DR8 has more than 4300 ID's of NGC objects. Divided by 50 will be more than 80 posts  ;D  On "visual list tool" it's two times 86 pages. (I could post a zip file for it like the NGC Data of the Famous Places page )

A more organized and informative list is needed, and I hope a moving of my posts (after finishing the ~80 ;) ) an ordered whole to the Astronomer board.

c_cld

c_cld

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NGC Data
The Famous Places - NGC Objects said
Quote
Of the 7,800 NGC objects, 591 have been observed by the SDSS.
That was at the DR2's epoch.

Now DR8 has more than 4300 ID's of NGC objects.

On "visual list tool" it's two times 86 pages.
I attach a csv file (but .txt for upload) of this data like the NGC Data of the Famous Places page )

In using the SDSS DR8 Image List Tool you'll have to paste the data in two pieces due to server constraints.

If complaints from zooites like this post by Liz
http://www.galaxyzooforum.org/index.php?topic=273743.msg589702#msg589702
of doing the "organized" image database you required (I am not in this forum to paste pics at random) I'll leave the "NGC thread" to whom claim its ownership.
I am not the owner of any thread  ;D

c_cld

elizabeth

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NGC Data
The Famous Places - NGC Objects said
Quote
Of the 7,800 NGC objects, 591 have been observed by the SDSS.
That was at the DR2's epoch.

Now DR8 has more than 4300 ID's of NGC objects.

On "visual list tool" it's two times 86 pages.
I attach a csv file (but .txt for upload) of this data like the NGC Data of the Famous Places page )

In using the SDSS DR8 Image List Tool you'll have to paste the data in two pieces due to server constraints.

If complaints from zooites like this post by Liz
http://www.galaxyzooforum.org/index.php?topic=273743.msg589702#msg589702
of doing the "organized" image database you required (I am not in this forum to paste pics at random) I'll leave the "NGC thread" to whom claim its ownership.
I am not the owner of any thread  ;D

c_cld
;D  ;D I see I should of posted my remarks in this thread. I have no complaint to make on this wonderful project or all the hard work it will take to complete. My only suggestion is that a NEW THREAD should be used. Perhaps here on "The site and the science" board.  Since this project is differently more science based than the random pics posted in the "NGC thread"IMHO :D

LankyYankee

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 ;D  ;D I see I should of posted my remarks in this thread. I have no complaint to make on this wonderful project or all the hard work it will take to complete. My only suggestion is that a NEW THREAD should be used. Perhaps here on "The site and the science" board.  Since this project is differently more science based than the random pics posted in the "NGC thread"IMHO :D
[/quote]

I completely agree that a thread with objects in numerical order should be new threads, with names to indicate exactly what they are.

I am strongly in favor of trying to find a way to design such threads so new material can be added within the thread, and not just at the end, like all the existing threads.  A thread in which material could be added within the thread would make it possible to include each Data Release image for a particular object in one place, plus it would make it possible to insert related images of a particular object, such as an image showing where an object lies within a cluster or a system.

c_cld

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I completely agree that a thread with objects in numerical order should be new threads, with names to indicate exactly what they are.

What is your need of numerical order ?
NGCxxxx A/B/C.../E  + ICxxxx ?; DR7 id ?; DR8 Id? ; DRx

You are facing the same dilemna as John Louis Emile DREYER when the Council proposed to him to amalgamate the three Herschel 's catalogues  into a new General Catalogue.
Quote from: J.L.E. Dreyer
It was with much regret that i found it necessary to introduce new numbers, and it was greatly to be hoped that these will be quoted as little as possible but that old nebulae, as hitherto, will be chiefly mentioned by their h number, or failing such by their H class and number.

The Dreyer's catalogue arrangement was first by RA; and it was later revised for some inaccuracies and additions.

RA is the most stable parameter as the equinoxe reference  system last 50 years (J200 after B1950).