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ASTR: ngc 7080
NGC 7080 image down sampled 0.4x cropped full size below
Vulpecula Penryn, California August 2008 M 250 @ f9.3 (ag, ST-4) ST-10XME LRGB 10 minute subs A mag. 14 type SBb galaxy surrounded by galactic dust. I could not find any scientific papers on this interesting galaxy. |
#2
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ngc 7080
that's a cool shot
I see you are surrounded by the integrated flux nebula it takes dark skies to log that the galaxy is another of those "interesting ones" like Rick shoots all the time Galaxies for me are a whole new world since all I really did for years was nebula shots, mostly using tricolor emission line techniques since I was imaging from a bright backyard in the 'burbs of the East Bay, nebular imaging made a lot of sense but now that I have decent skies at the ranch, I am rediscovering how cool galaxies can be I am eager to log more time with the Stinger running in the 0.45"/pixel to 0.8"/pixel range your images and especially Rick's give me lots of potential targets that are 1) off the beaten path 2) have interesting structure or something else that makes them unusual I like that! rdc "Glen Youman" wrote in message ... NGC 7080 image down sampled 0.4x cropped full size below Vulpecula Penryn, California August 2008 M 250 @ f9.3 (ag, ST-4) ST-10XME LRGB 10 minute subs A mag. 14 type SBb galaxy surrounded by galactic dust. I could not find any scientific papers on this interesting galaxy. |
#3
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ngc 7080
What was the total exposure time Glen? You said you did 10 minute subs, but
how many? "Glen Youman" wrote in message ... NGC 7080 image down sampled 0.4x cropped full size below Vulpecula Penryn, California August 2008 M 250 @ f9.3 (ag, ST-4) ST-10XME LRGB 10 minute subs A mag. 14 type SBb galaxy surrounded by galactic dust. I could not find any scientific papers on this interesting galaxy. |
#4
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ASTR: ngc 7080
On 5/24/2010 1:02 PM, Glen Youman wrote:
NGC 7080 image down sampled 0.4x cropped full size below Vulpecula Penryn, California August 2008 M 250 @ f9.3 (ag, ST-4) ST-10XME LRGB 10 minute subs A mag. 14 type SBb galaxy surrounded by galactic dust. I could not find any scientific papers on this interesting galaxy. That small one is on my to-do list but I hadn't realized it was in IFN. Guess I'll have to move it up a notch in priority. POSS plates have to be stretched like crazy to show most IFN so it usually comes as a surprise to me. Galaxy sits in a hole in it. I just barely see it in the red plates when super stretched. You did a nice job with it. 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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ngc 7080
Not sure of the defintion of integrated flux nebulae.
Years ago when I first imaged a galaxy in Pegasus the raw data seemed to be messed up with what appeared to be frost/dewand/or ambient light. The problem went away when I switched to a different area of the sky. The following year I again attempted the same galaxy in Pegasus with the same result so I did some investigating and discovered the caltech site on galatic dust. http://irsa.ipac.caltech.edu/applications/DUST/ Every galaxy I've imaged in or near Pegasus is shrouded in dust, most are faint with respect to the dust but it still visible and it matches the caltech data as to distribution. Clear, dark skys and keep posting...... On Mon, 24 May 2010 19:20:05 -0700, "Richard Crisp" wrote: that's a cool shot I see you are surrounded by the integrated flux nebula it takes dark skies to log that the galaxy is another of those "interesting ones" like Rick shoots all the time Galaxies for me are a whole new world since all I really did for years was nebula shots, mostly using tricolor emission line techniques since I was imaging from a bright backyard in the 'burbs of the East Bay, nebular imaging made a lot of sense but now that I have decent skies at the ranch, I am rediscovering how cool galaxies can be I am eager to log more time with the Stinger running in the 0.45"/pixel to 0.8"/pixel range your images and especially Rick's give me lots of potential targets that are 1) off the beaten path 2) have interesting structure or something else that makes them unusual I like that! rdc "Glen Youman" wrote in message .. . NGC 7080 image down sampled 0.4x cropped full size below Vulpecula Penryn, California August 2008 M 250 @ f9.3 (ag, ST-4) ST-10XME LRGB 10 minute subs A mag. 14 type SBb galaxy surrounded by galactic dust. I could not find any scientific papers on this interesting galaxy. |
#6
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ngc 7080
Steve Mandel named the IFN. Here's his definition: Integrated Flux
Nebulae is the term coined to describe a nebula illuminated by the integrated visual and UV flux of the Milky Way. This distinguishes this type of nebula from the typical Reflection Nebula, which is illuminated by a nearby star. Yes there is some in Pegasus but not the entire constellation. I've processed several galaxies in the Great Square that showed no sign of it. What you referenced is dust seen in IR. This tends to be close to the galactic plane while the IFN tends to be strongest well away from the plane as it is reflected light from the visual and UV light of the galaxy. The UV causes a red glow similar to the colors you get from minerals when hit by UV light. It is more often seen in some ghostly reflection nebula but is also seen in the IFN as well, just fainter. The blue comes from the light reflected from the massive O and B stars in the spiral arms. Since this is usually hidden by dust at low galactic declination it is normally only seen sell above the plane of the galaxy. Some areas of the sky are surprisingly bright in it. How it escaped detection for so long amazes me. It is seen in the POSS plates if you really stretch them but doesn't show well otherwise. So apparently CCDs pick it up much better than film. Also many probably had your reaction. Thinking it due to bad flats, reflections or some else they did rather than real. I know in some of my early images I processed it out I was so sure it was me. I can't now recall which ones I did this to, just that I know I did a couple of times. So I haven't gone back to correct my error. The strongest I've picked up is Arp 276 in Ares. I've attached that image. It is just my standard 40 minutes of L and 20 of each color so not at all a deep image yet the IFN came screaming through. It is also sometimes called Galactic Cirrus. Though IFN is now becoming the preferred name at least by amateurs. Rick On 5/26/2010 12:48 PM, Glen Youman wrote: Not sure of the defintion of integrated flux nebulae. Years ago when I first imaged a galaxy in Pegasus the raw data seemed to be messed up with what appeared to be frost/dewand/or ambient light. The problem went away when I switched to a different area of the sky. The following year I again attempted the same galaxy in Pegasus with the same result so I did some investigating and discovered the caltech site on galatic dust. http://irsa.ipac.caltech.edu/applications/DUST/ Every galaxy I've imaged in or near Pegasus is shrouded in dust, most are faint with respect to the dust but it still visible and it matches the caltech data as to distribution. Clear, dark skys and keep posting...... On Mon, 24 May 2010 19:20:05 -0700, "Richard Crisp" wrote: that's a cool shot I see you are surrounded by the integrated flux nebula it takes dark skies to log that the galaxy is another of those "interesting ones" like Rick shoots all the time Galaxies for me are a whole new world since all I really did for years was nebula shots, mostly using tricolor emission line techniques since I was imaging from a bright backyard in the 'burbs of the East Bay, nebular imaging made a lot of sense but now that I have decent skies at the ranch, I am rediscovering how cool galaxies can be I am eager to log more time with the Stinger running in the 0.45"/pixel to 0.8"/pixel range your images and especially Rick's give me lots of potential targets that are 1) off the beaten path 2) have interesting structure or something else that makes them unusual I like that! rdc "Glen wrote in message ... NGC 7080 image down sampled 0.4x cropped full size below Vulpecula Penryn, California August 2008 M 250 @ f9.3 (ag, ST-4) ST-10XME LRGB 10 minute subs A mag. 14 type SBb galaxy surrounded by galactic dust. I could not find any scientific papers on this interesting galaxy. |
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ASTR: ngc 7080
1500 minutes total luminance.
On Tue, 25 May 2010 13:11:02 -0500, Rick Johnson wrote: On 5/24/2010 1:02 PM, Glen Youman wrote: NGC 7080 image down sampled 0.4x cropped full size below Vulpecula Penryn, California August 2008 M 250 @ f9.3 (ag, ST-4) ST-10XME LRGB 10 minute subs A mag. 14 type SBb galaxy surrounded by galactic dust. I could not find any scientific papers on this interesting galaxy. That small one is on my to-do list but I hadn't realized it was in IFN. Guess I'll have to move it up a notch in priority. POSS plates have to be stretched like crazy to show most IFN so it usually comes as a surprise to me. Galaxy sits in a hole in it. I just barely see it in the red plates when super stretched. You did a nice job with it. Rick |
#8
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ASTR: ngc 7080
Too easy to hit the send before checking what was written - total
exposure time (luminance) was 150 minutes, not 1500. On Wed, 26 May 2010 21:55:02 -0700, Glen Youman wrote: 1500 minutes total luminance. On Tue, 25 May 2010 13:11:02 -0500, Rick Johnson wrote: On 5/24/2010 1:02 PM, Glen Youman wrote: NGC 7080 image down sampled 0.4x cropped full size below Vulpecula Penryn, California August 2008 M 250 @ f9.3 (ag, ST-4) ST-10XME LRGB 10 minute subs A mag. 14 type SBb galaxy surrounded by galactic dust. I could not find any scientific papers on this interesting galaxy. That small one is on my to-do list but I hadn't realized it was in IFN. Guess I'll have to move it up a notch in priority. POSS plates have to be stretched like crazy to show most IFN so it usually comes as a surprise to me. Galaxy sits in a hole in it. I just barely see it in the red plates when super stretched. You did a nice job with it. Rick |
#9
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ngc 7080
15 sub exposures for a total of 150 minutes .
On Mon, 24 May 2010 19:21:10 -0700, "Richard Crisp" wrote: What was the total exposure time Glen? You said you did 10 minute subs, but how many? "Glen Youman" wrote in message .. . NGC 7080 image down sampled 0.4x cropped full size below Vulpecula Penryn, California August 2008 M 250 @ f9.3 (ag, ST-4) ST-10XME LRGB 10 minute subs A mag. 14 type SBb galaxy surrounded by galactic dust. I could not find any scientific papers on this interesting galaxy. |
#10
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ngc 7080
Great image Glen. I put this one on my list, although I certainly won't get
the background nebula. Stefan "Glen Youman" schrieb im Newsbeitrag ... NGC 7080 image down sampled 0.4x cropped full size below Vulpecula Penryn, California August 2008 M 250 @ f9.3 (ag, ST-4) ST-10XME LRGB 10 minute subs A mag. 14 type SBb galaxy surrounded by galactic dust. I could not find any scientific papers on this interesting galaxy. |
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