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ASTRO: Galaxy Cluster Abell 260 - negative image.
Here's the same image shown as a negative, with a few of the brightest
galaxies ID'ed. Elliptical Galaxy IC 1733 is by far the largest and brightest galaxy in Galaxy Cluster Abell 260. Located at the center of the cluster this massive system is a "Cluster Dominant Elliptical" of a type similar to M-87. Nearby companion Spiral Galaxy IC 1735 was the host of Supernova 2006je (found in October 2006). This peculiar type Ia supernova had already faded from view when this image was taken on Nov 22, 2006. The image shows only the central portion of Galaxy Cluster Abell 260. Spread over an area of 50 arc minutes this cluster contains about 160 galaxies, a number of which are seen in the image. Based on the published red shift I calculated a rough distance estimate of 562 million light years and at that distance IC 1733 would be a huge 228,000 light years, but that would not be surprising for a cluster dominant elliptical with over a trillion stars. George N |
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ASTRO: Galaxy Cluster Abell 260 - negative image.
Bunch of faint guys there. George. Happy to see you guys getting the 20"
back to working order. -- Regards, Doug W. www.photonsfate.com -- "George Normandin" wrote in message ... Here's the same image shown as a negative, with a few of the brightest galaxies ID'ed. Elliptical Galaxy IC 1733 is by far the largest and brightest galaxy in Galaxy Cluster Abell 260. Located at the center of the cluster this massive system is a "Cluster Dominant Elliptical" of a type similar to M-87. Nearby companion Spiral Galaxy IC 1735 was the host of Supernova 2006je (found in October 2006). This peculiar type Ia supernova had already faded from view when this image was taken on Nov 22, 2006. The image shows only the central portion of Galaxy Cluster Abell 260. Spread over an area of 50 arc minutes this cluster contains about 160 galaxies, a number of which are seen in the image. Based on the published red shift I calculated a rough distance estimate of 562 million light years and at that distance IC 1733 would be a huge 228,000 light years, but that would not be surprising for a cluster dominant elliptical with over a trillion stars. George N |
#3
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ASTRO: Galaxy Cluster Abell 260 - negative image.
I've tried turning some of my galaxy fields to negatives to better show
the faint fuzzies but for some reason they show poorly in the negative compared to the positive. Thus I used the positive to ID the faint fuzzies in my NGC 185 shot I posted a couple days ago. I don't know what I'm doing wrong. I should work on some galaxy clusters. So far only the Hercules cluster is in my collection. Went for it as spirals are more interesting than the elipticals that seem to dominate most clusters. Least to me they are are more interesting. Rick George Normandin wrote: Here's the same image shown as a negative, with a few of the brightest galaxies ID'ed. Elliptical Galaxy IC 1733 is by far the largest and brightest galaxy in Galaxy Cluster Abell 260. Located at the center of the cluster this massive system is a "Cluster Dominant Elliptical" of a type similar to M-87. Nearby companion Spiral Galaxy IC 1735 was the host of Supernova 2006je (found in October 2006). This peculiar type Ia supernova had already faded from view when this image was taken on Nov 22, 2006. The image shows only the central portion of Galaxy Cluster Abell 260. Spread over an area of 50 arc minutes this cluster contains about 160 galaxies, a number of which are seen in the image. Based on the published red shift I calculated a rough distance estimate of 562 million light years and at that distance IC 1733 would be a huge 228,000 light years, but that would not be surprising for a cluster dominant elliptical with over a trillion stars. George N |
#4
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ASTRO: Galaxy Cluster Abell 260 - negative image.
i just love those negative maps george!
"George Normandin" wrote in message ... Here's the same image shown as a negative, with a few of the brightest galaxies ID'ed. Elliptical Galaxy IC 1733 is by far the largest and brightest galaxy in Galaxy Cluster Abell 260. Located at the center of the cluster this massive system is a "Cluster Dominant Elliptical" of a type similar to M-87. Nearby companion Spiral Galaxy IC 1735 was the host of Supernova 2006je (found in October 2006). This peculiar type Ia supernova had already faded from view when this image was taken on Nov 22, 2006. The image shows only the central portion of Galaxy Cluster Abell 260. Spread over an area of 50 arc minutes this cluster contains about 160 galaxies, a number of which are seen in the image. Based on the published red shift I calculated a rough distance estimate of 562 million light years and at that distance IC 1733 would be a huge 228,000 light years, but that would not be surprising for a cluster dominant elliptical with over a trillion stars. George N |
#5
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ASTRO: Galaxy Cluster Abell 260 - negative image.
"Doug W." wrote
.... Bunch of faint guys there. George. Happy to see you guys getting the 20" back to working order. Doug, The 20RC is almost back to normal....... just in time for the winter snow storms! If the Roberson Museum closes Kopernik you'll probably be able to buy the scope cheap on AstroMart! George N |
#6
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ASTRO: Galaxy Cluster Abell 260 - negative image.
"Rick Johnson" wrote
... I've tried turning some of my galaxy fields to negatives to better show the faint fuzzies but for some reason they show poorly in the negative compared to the positive. Thus I used the positive to ID the faint fuzzies in my NGC 185 shot I posted a couple days ago. I don't know what I'm doing wrong. Rick, I paste the final result of processing (usually with a DDP stretch) into Corel Photopaint, convert to a negative, and then use curves to bring up the faint end. It looks ugly, but it really shows the dimmest stuff in the image. I should work on some galaxy clusters......... Try 'googling' "Paul Hickson's Atlas of Compact Groups of Galaxies". The 100 Hickson Compact Groups are much loved by owners of big Dobs for visual challenges, and they also are interesting targets for CCD. Here (http://www.kopernik.org/images/archive/ngcindex.htm) is my group's archive of images; our Hickson Group images are listed near the top. George N |
#7
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ASTRO: Galaxy Cluster Abell 260 - negative image.
I truly hope that the scope stays put and the obs stays intact.
-- Regards, Doug W. www.photonsfate.com -- "George Normandin" wrote in message ... "Doug W." wrote ... Bunch of faint guys there. George. Happy to see you guys getting the 20" back to working order. Doug, The 20RC is almost back to normal....... just in time for the winter snow storms! If the Roberson Museum closes Kopernik you'll probably be able to buy the scope cheap on AstroMart! George N |
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