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List of cataloged observable objects in galaxies?

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#1 _Z_

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Posted 13 September 2013 - 02:45 PM

Is there a list of the cataloged objects located within other galaxies that can be observed with a telescope?

I know a few HII regions in some galaxies are NGCs for example, and Andromeda has some objects like G1. Is there a list that says which NGCs are within other galaxies? I've been able to see mag 16+ hickson galaxies in my 16" and a friend has a 25" if we're really having trouble, so we can pull in some decently faint objects.

Are there any good charts of M31 and M33 that show the cataloged items in them? I haven't found anything online.

Thanks,
Jeremy

#2 hbanich

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Posted 13 September 2013 - 04:01 PM

Hi Jeremy,

I don't know of list of cataloged objects in other galaxies, but if you go to http://www.ngcicproj...dss_messier.asp you can find images of M31, M33 and M101 with their NGC and IC objects labeled. It's nowhere near complete but it's a start.

Although it would take more effort, you can use the Aladin Sky Atlas, http://aladin.u-strasbg.fr/ to locate tons of objects in other galaxies. You'll find all sorts of objects, most of which there's no hope to see visually, but this is the most exhaustive source I know of. You'll certainly gain an appreciation of how many discrete objects have been identified in the closest galaxies.

#3 IVM

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Posted 13 September 2013 - 09:43 PM

Generally one has to search the primary scientific literature for specific galaxies. It is not easy but at least most articles are now freely available online.

The printed books I consult most often are

1) Atlas of the Messier Objects by Stoyan and others (Cambridge, recent). It has photographic charts for many Messier galaxies with objects labeled that are most likely to be accessible to visual observers. In general the book follows good practice as far as citations, but it seems that there are omissions and in some cases it requires some work to identify the objects mentioned with the professional literature sources.

2) An Atlas of Local Group Galaxies by Hodge and others (Kluwer, recent). It is a multi-band photographic atlas and catalog of objects within the Local Group galaxies, with the exception of M31 and the Magellanic Clouds. It is so detailed that it is not convenient to use at the telescope as the first resort, but it is invaluable when you target objects beyond the most prominent in busy fields. Watch out for a few errors in catalog tables, e.g. cross-identification between primary sources. But it is probably safe to say that there is no printed book of comparable scope and depth.

3) Atlas of the Andromeda Galaxy by Hodge (long out of print). This one covers M31 in the same style. Some information is out of date. Generally it is good for the visual observer to restrict himself to objects discovered by the time of this book's printing, so the incompleteness is not the problem. The problem may be objects whose extragalactic nature has since been refuted. There is a kind of electronic version of this book on NED, although it is even more difficult to use than the printed book.

I also consult the atlases created by Hodge and co-authors for the Magellanic Clouds. Long out of print, these are boxes of unbound photographic charts in B, V, and H-alpha, accompanied by slim catalog books. Recently I have also consulted Alvin Huey's PDF guide to observing the Local Group (faint-fuzzies.com).

#4 Bill Weir

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Posted 14 September 2013 - 01:32 PM

http://www.astronomy...tar.Clouds.html

http://www.astronomy...ace/gcextra.htm

http://www.astronomy...Space/gcm31.htm

http://www.astronomy...ace/barnard.htm

Hi Jeremy

As you can see all were mined from the same site. You planning on going outside the galaxy? With your 16" you should be able to get many of these. I did with my 12.5 although it took my 20" to complete most of the extra galactic GCs.

Bill

#5 _Z_

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Posted 14 September 2013 - 09:56 PM

Hi Jeremy,

I don't know of list of cataloged objects in other galaxies, but if you go to http://www.ngcicproj...dss_messier.asp you can find images of M31, M33 and M101 with their NGC and IC objects labeled. It's nowhere near complete but it's a start.

Although it would take more effort, you can use the Aladin Sky Atlas, http://aladin.u-strasbg.fr/ to locate tons of objects in other galaxies. You'll find all sorts of objects, most of which there's no hope to see visually, but this is the most exhaustive source I know of. You'll certainly gain an appreciation of how many discrete objects have been identified in the closest galaxies.


Thanks! I'm most interested in the more common cataloged objects like the NGCs and ICs since i'm getting started. Adding things like G1 will be the next challenge once i'm used to poking around those galaxies.

#6 _Z_

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Posted 14 September 2013 - 09:56 PM

Generally one has to search the primary scientific literature for specific galaxies. It is not easy but at least most articles are now freely available online.

The printed books I consult most often are

1) Atlas of the Messier Objects by Stoyan and others (Cambridge, recent). It has photographic charts for many Messier galaxies with objects labeled that are most likely to be accessible to visual observers. In general the book follows good practice as far as citations, but it seems that there are omissions and in some cases it requires some work to identify the objects mentioned with the professional literature sources.

2) An Atlas of Local Group Galaxies by Hodge and others (Kluwer, recent). It is a multi-band photographic atlas and catalog of objects within the Local Group galaxies, with the exception of M31 and the Magellanic Clouds. It is so detailed that it is not convenient to use at the telescope as the first resort, but it is invaluable when you target objects beyond the most prominent in busy fields. Watch out for a few errors in catalog tables, e.g. cross-identification between primary sources. But it is probably safe to say that there is no printed book of comparable scope and depth.

3) Atlas of the Andromeda Galaxy by Hodge (long out of print). This one covers M31 in the same style. Some information is out of date. Generally it is good for the visual observer to restrict himself to objects discovered by the time of this book's printing, so the incompleteness is not the problem. The problem may be objects whose extragalactic nature has since been refuted. There is a kind of electronic version of this book on NED, although it is even more difficult to use than the printed book.

I also consult the atlases created by Hodge and co-authors for the Magellanic Clouds. Long out of print, these are boxes of unbound photographic charts in B, V, and H-alpha, accompanied by slim catalog books. Recently I have also consulted Alvin Huey's PDF guide to observing the Local Group (faint-fuzzies.com).


Thanks! Huey's guide looks particularly helpful in locating some objects!

#7 _Z_

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Posted 14 September 2013 - 10:01 PM

http://www.astronomy...tar.Clouds.html

http://www.astronomy...ace/gcextra.htm

http://www.astronomy...Space/gcm31.htm

http://www.astronomy...ace/barnard.htm

Hi Jeremy

As you can see all were mined from the same site. You planning on going outside the galaxy? With your 16" you should be able to get many of these. I did with my 12.5 although it took my 20" to complete most of the extra galactic GCs.

Bill


Hey Bill! Thanks for the links, they should come in handy. I've been going after a lot of the tougher lists of objects I can find. I've been working on the Hickson Groups and managed to get 55 recently, with the mag 16.6 component visible and confirmed by Andreas, and the mag 16.8 and 17.0 components possibly having been visible. I figured objects in other galaxies would be a nice challenge to add. :)

#8 _Z_

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Posted 08 October 2013 - 07:14 PM

Well I managed to put Alvin Huey's guide to good use at a star party last weekend. We logged 4 globulars in M31, ranging from mag 14.2 to 15.4, as small as .3'. We observed 1 glob in M110, along with 7 IC and NGC objects in M33. I may have been able to find dimmer ones, but transparency was only average. I highly recommend trying out that guide, it was a lot easier than expected to find globular clusters in the Andromeda Galaxy.






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