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Requiem for Relativity
16 years 7 months ago #7801
by Stoat
Replied by Stoat on topic Reply from Robert Turner
Heres the dss red image of that bit of sky. I've put two yellow lines on it as markers for where you have to drag the Bradford telescope image onto it in photoshop (the tracking is a bit off with the Bradford.) I'm not sure yet hen the dss image was taken but there's quite a bit of proper star motions going on in here.
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16 years 7 months ago #20905
by Stoat
Replied by Stoat on topic Reply from Robert Turner
The dss image was taken in 1987. Teh image size is 17.1' wide by 17.6' deep
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- Joe Keller
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16 years 7 months ago #18217
by Joe Keller
Replied by Joe Keller on topic Reply from
The Mar. 19, 2008 Bradford photo is upside down (South at the top, West at the right). I see two additional disappearing dots on it, but the green dot you noted seems approximately consistent with Frey's position. It's brighter than expected (the magnitude limit seems too low to detect the objects seen on the sky surveys) but still it could be Frey.
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16 years 7 months ago #18111
by Stoat
Replied by Stoat on topic Reply from Robert Turner
Hi Joe, the digital sky survey image is also upside down then. I blame the Australian astronomers that took it.
As I've said, hold down the mouse key on those images and download them. In photoshop, or paintshop pro open the sky survey image, then open the bradford nem4b image (the better one) Then do a "select all." This can be found in the top menu, or "apple a" "command a", on p.c. and a dotted line will appear round the image. Then do a "copy" command, which is again on the menu, or "apple c", "command c" on p.c.
Then select the sky survey image, by just clicking on its border, to bring it to the front. Then do a "paste" command, which is again from the menu, or apple v", "command v". This pastes a new layer over and above the sky survey.
In the layers palette on the right, you can adjust the transparency of that layer. Knock it down about 30% Make sure that the "move tool" from the tools palette, on the left; that's the one with arrows, top right button of the tools palette; is selected.
Drag the bradford image up to line up with those yellow lines. Then blink the images. There's a little eye symbol on the layers palette, click it on and off.
You'll see that there's a good line up on some stars but others have large proper motions. Zoom in on some of the fainter objects that show on both plates. Then use the arrow keys on your keypad to "nudge" the top plate into line up with them. A couple of galaxies look good for that, no proper motion.
Then, once you're happy that the two plates are lined up nicely, slide the transparency slider back to 100% Do another set of blinks, to see the things which look as though they are moving back and forth, or are not on both plates. There are a number of things to look at then.
Maybe you should ask some of the people doing the stuff on Mars images here, to help out with this. They know their photoshop inside out
As I've said, hold down the mouse key on those images and download them. In photoshop, or paintshop pro open the sky survey image, then open the bradford nem4b image (the better one) Then do a "select all." This can be found in the top menu, or "apple a" "command a", on p.c. and a dotted line will appear round the image. Then do a "copy" command, which is again on the menu, or "apple c", "command c" on p.c.
Then select the sky survey image, by just clicking on its border, to bring it to the front. Then do a "paste" command, which is again from the menu, or apple v", "command v". This pastes a new layer over and above the sky survey.
In the layers palette on the right, you can adjust the transparency of that layer. Knock it down about 30% Make sure that the "move tool" from the tools palette, on the left; that's the one with arrows, top right button of the tools palette; is selected.
Drag the bradford image up to line up with those yellow lines. Then blink the images. There's a little eye symbol on the layers palette, click it on and off.
You'll see that there's a good line up on some stars but others have large proper motions. Zoom in on some of the fainter objects that show on both plates. Then use the arrow keys on your keypad to "nudge" the top plate into line up with them. A couple of galaxies look good for that, no proper motion.
Then, once you're happy that the two plates are lined up nicely, slide the transparency slider back to 100% Do another set of blinks, to see the things which look as though they are moving back and forth, or are not on both plates. There are a number of things to look at then.
Maybe you should ask some of the people doing the stuff on Mars images here, to help out with this. They know their photoshop inside out
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16 years 7 months ago #20582
by Stoat
Replied by Stoat on topic Reply from Robert Turner
Oops [] Flip the bradford image horizontally. I must have forget that I'd done that.
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16 years 7 months ago #20586
by Stoat
Replied by Stoat on topic Reply from Robert Turner
If I've even got the images lined up correctly, and that's something of an if, as bright stars show up as rather red and dim on the bradford image. Plus there's proper motions. And one bright star seems to have vanished from the face of the earth (excuse the lousey pun)
Anyway, Go almost straight up, about 5'(a third of the bradford image) from that green dot. Then across to the left, past the whitish star to an orange red star. That might be a possible.
If one wants to just look at it on the board, remember that it needs to be flipped, so look across to the right.
Anyway, Go almost straight up, about 5'(a third of the bradford image) from that green dot. Then across to the left, past the whitish star to an orange red star. That might be a possible.
If one wants to just look at it on the board, remember that it needs to be flipped, so look across to the right.
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