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ASTRO: SH2-239 and a mystery object
Sharpless 239. This is a mostly reflection/dark nebula with several
Herbig-Haro objects imbedded in it -- the pink spots. It also contains a mystery I've not been able to solve. Notice the three near star-like points in a triangle in its center. The POSS 1 and 2 plates show only two. The one at the lower left is missing! I've tried to find out about it but so far with no luck. My first thought was a variable star though i couldn't find any listed for its position. Checking what few images of this object exist on the net I find all modern ones show the star-like object but those dating to the time of the POSS plates don't. I contacted as astronomer in Hawaii that was supposed to be an expert and was told it was on his narrow band image (great shot with a 2.5 meter scope) but he provided no date. Since it wasn't a "new" object he wasn't interested and told me that it was worthless to compare narrow band images to the POSS plates, totally ignoring the fact my shot wasn't narrow band! I wrote him back asking why it wasn't allowed to compare wide band red images to red POSS plates and got no reply. Maybe my email didn't get through his filters. My original email was relayed by another astronomer who I didn't bother to relay my reply. Thus he will remain nameless here. It appears that sometime between the POSS plates and today this object has come out of the murky depths of the nebula for us to see. Though in doing so it didn't change the nebula much that I can see. I do see a slight brightening in this area on the POSS 2 plates so it may have just started to appear about that time. Or maybe it is a variable star everyone since has caught at near maximum. I just don't know. Rather than type away as to what a HH (Herbig-Haro) object is I'll just refer to this link. http://en.wikipedia.org/wiki/Herbig-Haro_object They aren't necessarily pink (pink is due to ionized hydrogen gas) and in fact the other two star like objects carry HH designations and the "new" one may be another that is now showing as blocking dust moved out of our line of sight. I wanted to see it in IR light but couldn't find any images. I'd hoped to find some by Spitzer. If anyone knows of any let me know. For a color image of this object made from the POSS plates (without my mystery object) see: http://galaxymap.org/cgi-bin/details....5&name=S23 9 I found no solid distance estimate for this object but if it is associated with the same dust cloud as T Tauri - which appears quite possible then it is a bit under 600 light years from us. 14" LX200R @ f/10, L=6x10', R=2x10' GB=3x10' lost a red to clouds, STL-11000XM, Paramount ME Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#2
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ASTRO: SH2-239 and a mystery object
Rick,
I've attached a blink of your image and a possII (red, (r+b/2), blue) for comparison. Two things stand out; a shift to the southwest of only the "pink" data in your image (possible registration problem?) and the new "not pink" starlike item. Very interesting! Your "out of the murky depths" hypothesis is quite plausible! Rick Johnson wrote: Sharpless 239. This is a mostly reflection/dark nebula with several Herbig-Haro objects imbedded in it -- the pink spots. It also contains a mystery I've not been able to solve. Notice the three near star-like points in a triangle in its center. The POSS 1 and 2 plates show only two. The one at the lower left is missing! 14" LX200R @ f/10, L=6x10', R=2x10' GB=3x10' lost a red to clouds, STL-11000XM, Paramount ME Rick ------------------------------------------------------------------------ -- Adriano 34°14'11.7"N |
#3
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ASTRO: SH2-239 and a mystery object
Rick Johnson wrote:
I wanted to see it in IR light but couldn't find any images. I'd hoped to find some by Spitzer. If anyone knows of any let me know. I found an image by Hubble - it's a raw file, Your mystery object just happens to be in the field of view! (circled). Herbig-Haro 29 is the large bright object at the bottom. North is to the upper left. Cheers, -- Adriano 34°14'11.7"N |
#4
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ASTRO: SH2-239 and a mystery object
Adriano wrote: Rick Johnson wrote: I wanted to see it in IR light but couldn't find any images. I'd hoped to find some by Spitzer. If anyone knows of any let me know. I found an image by Hubble - it's a raw file, Your mystery object just happens to be in the field of view! (circled). Herbig-Haro 29 is the large bright object at the bottom. North is to the upper left. Cheers, ------------------------------------------------------------------------ Surprisingly faint. Any date or filter info? Every time I see a raw Hubble image and those zillion cosmic ray hits it makes me wonder if we want to be in space for long periods of time. Yes those are rather weak ones but still... I get one of those every few weeks not thousands per image. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#5
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ASTRO: SH2-239 and a mystery object
How do you separate pink out like that? My Photoshop skills are highly
limited. I took the color data months after the lum data so both image scale (due to 30C temp difference) and orientation were different. I may have not hit the right buttons in Registar and only aligned the image but not resized it. That could cause what you are seeing. I redid it making sure I was aligned. My processing skills can't repeat exactly so there's a slight difference between the two. But I do see this version as sharper which bad size registration would reduce. See if the pink is stable now. I don't know how to do it. I'm wondering about what looks like a satellite trail in the less colored image. I went through all subs and can't find any trace of it yet there it is. I stretched them pretty hard yet no sign of it. Rick Adriano wrote: Rick, I've attached a blink of your image and a possII (red, (r+b/2), blue) for comparison. Two things stand out; a shift to the southwest of only the "pink" data in your image (possible registration problem?) and the new "not pink" starlike item. Very interesting! Your "out of the murky depths" hypothesis is quite plausible! Rick Johnson wrote: Sharpless 239. This is a mostly reflection/dark nebula with several Herbig-Haro objects imbedded in it -- the pink spots. It also contains a mystery I've not been able to solve. Notice the three near star-like points in a triangle in its center. The POSS 1 and 2 plates show only two. The one at the lower left is missing! 14" LX200R @ f/10, L=6x10', R=2x10' GB=3x10' lost a red to clouds, STL-11000XM, Paramount ME Rick ------------------------------------------------------------------------ |
#6
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ASTRO: SH2-239 - animation 600k
This animation has 3 frames, POSS I, POSS II, and then your recent
image. What is instantly obvious is the motion of those HH objects. Those pink areas in your image are not misaligned, they're really moving! Lots of neat stuff going on. Rick Johnson wrote: How do you separate pink out like that? My Photoshop skills are highly limited. I took the color data months after the lum data so both image scale (due to 30C temp difference) and orientation were different. I may have not hit the right buttons in Registar and only aligned the image but not resized it. That could cause what you are seeing. I redid it making sure I was aligned. My processing skills can't repeat exactly so there's a slight difference between the two. But I do see this version as sharper which bad size registration would reduce. See if the pink is stable now. I don't know how to do it. I'm wondering about what looks like a satellite trail in the less colored image. I went through all subs and can't find any trace of it yet there it is. I stretched them pretty hard yet no sign of it. The track is on the POSS II plate, not your image. -- Adriano 34°14'11.7"N |
#7
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ASTRO: SH2-239 - animation 600k
Adriano wrote: This animation has 3 frames, POSS I, POSS II, and then your recent image. What is instantly obvious is the motion of those HH objects. Those pink areas in your image are not misaligned, they're really moving! Lots of neat stuff going on. Rick Johnson wrote: How do you separate pink out like that? My Photoshop skills are highly limited. I took the color data months after the lum data so both image scale (due to 30C temp difference) and orientation were different. I may have not hit the right buttons in Registar and only aligned the image but not resized it. That could cause what you are seeing. I redid it making sure I was aligned. My processing skills can't repeat exactly so there's a slight difference between the two. But I do see this version as sharper which bad size registration would reduce. See if the pink is stable now. I don't know how to do it. I'm wondering about what looks like a satellite trail in the less colored image. I went through all subs and can't find any trace of it yet there it is. I stretched them pretty hard yet no sign of it. The track is on the POSS II plate, not your image. ------------------------------------------------------------------------ OK now I understand what you were doing. Neat discovery! It also shows the object is very faint in the POSS 1 plate, a bit brighter in 2 and now about as bright as the other two objects. It all is fitting together now. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#8
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ASTRO: SH2-239 and a mystery object
Adriano wrote: Rick Johnson wrote: Surprisingly faint. Any date or filter info? March 20, 1999 Ha filter F656N You can read the paper on it he http://www.iop.org/EJ/article/1538-4...57/005387.html Thanks That brightness seems to fit neatly between POSS 2 and my shot as well. Though being narrow band it is hard to say for sure. Still interesting. I didn't realize how interesting when I took the image! Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#9
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ASTRO: SH2-239 and a mystery object
Rick Johnson wrote:
Surprisingly faint. Any date or filter info? March 20, 1999 Ha filter F656N You can read the paper on it he http://www.iop.org/EJ/article/1538-4...57/005387.html -- Adriano 34°14'11.7"N |
#10
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ASTRO: SH2-239 and a mystery object
Rick,
that's a neat region of the sky, lots of interesting stuff in your image. Stefan "Rick Johnson" schrieb im Newsbeitrag ster.com... Sharpless 239. This is a mostly reflection/dark nebula with several Herbig-Haro objects imbedded in it -- the pink spots. It also contains a mystery I've not been able to solve. Notice the three near star-like points in a triangle in its center. The POSS 1 and 2 plates show only two. The one at the lower left is missing! I've tried to find out about it but so far with no luck. My first thought was a variable star though i couldn't find any listed for its position. Checking what few images of this object exist on the net I find all modern ones show the star-like object but those dating to the time of the POSS plates don't. I contacted as astronomer in Hawaii that was supposed to be an expert and was told it was on his narrow band image (great shot with a 2.5 meter scope) but he provided no date. Since it wasn't a "new" object he wasn't interested and told me that it was worthless to compare narrow band images to the POSS plates, totally ignoring the fact my shot wasn't narrow band! I wrote him back asking why it wasn't allowed to compare wide band red images to red POSS plates and got no reply. Maybe my email didn't get through his filters. My original email was relayed by another astronomer who I didn't bother to relay my reply. Thus he will remain nameless here. It appears that sometime between the POSS plates and today this object has come out of the murky depths of the nebula for us to see. Though in doing so it didn't change the nebula much that I can see. I do see a slight brightening in this area on the POSS 2 plates so it may have just started to appear about that time. Or maybe it is a variable star everyone since has caught at near maximum. I just don't know. Rather than type away as to what a HH (Herbig-Haro) object is I'll just refer to this link. http://en.wikipedia.org/wiki/Herbig-Haro_object They aren't necessarily pink (pink is due to ionized hydrogen gas) and in fact the other two star like objects carry HH designations and the "new" one may be another that is now showing as blocking dust moved out of our line of sight. I wanted to see it in IR light but couldn't find any images. I'd hoped to find some by Spitzer. If anyone knows of any let me know. For a color image of this object made from the POSS plates (without my mystery object) see: http://galaxymap.org/cgi-bin/details....5&name=S23 9 I found no solid distance estimate for this object but if it is associated with the same dust cloud as T Tauri - which appears quite possible then it is a bit under 600 light years from us. 14" LX200R @ f/10, L=6x10', R=2x10' GB=3x10' lost a red to clouds, STL-11000XM, Paramount ME Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
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