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ASTR: ngc 7080



 
 
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  #1  
Old May 24th 10, 07:02 PM posted to alt.binaries.pictures.astro
Glen Youman
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Posts: 177
Default 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.




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ID:	2950  Click image for larger version

Name:	ngc 7080-lrgb-m08.jpg
Views:	116
Size:	75.6 KB
ID:	2951  
  #2  
Old May 25th 10, 03:20 AM posted to alt.binaries.pictures.astro
Richard Crisp[_1_]
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Posts: 985
Default 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  
Old May 25th 10, 03:21 AM posted to alt.binaries.pictures.astro
Richard Crisp[_1_]
external usenet poster
 
Posts: 985
Default 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  
Old May 25th 10, 07:11 PM posted to alt.binaries.pictures.astro
Rick Johnson[_2_]
external usenet poster
 
Posts: 3,085
Default 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".
  #5  
Old May 26th 10, 06:48 PM posted to alt.binaries.pictures.astro
Glen Youman
external usenet poster
 
Posts: 177
Default 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  
Old May 27th 10, 03:53 AM posted to alt.binaries.pictures.astro
Rick Johnson[_2_]
external usenet poster
 
Posts: 3,085
Default 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.






Attached Thumbnails
Click image for larger version

Name:	ARP276L4X10RGB2X10X3r.jpg
Views:	179
Size:	257.5 KB
ID:	2954  
  #7  
Old May 27th 10, 05:55 AM posted to alt.binaries.pictures.astro
Glen Youman
external usenet poster
 
Posts: 177
Default 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  
Old May 27th 10, 05:34 PM posted to alt.binaries.pictures.astro
Glen Youman
external usenet poster
 
Posts: 177
Default 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  
Old May 27th 10, 05:35 PM posted to alt.binaries.pictures.astro
Glen Youman
external usenet poster
 
Posts: 177
Default 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  
Old June 1st 10, 10:10 PM posted to alt.binaries.pictures.astro
Stefan Lilge
external usenet poster
 
Posts: 2,269
Default 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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