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Joe Keller's "Requiem for Relativity" thread
16 years 8 months ago #19725
by marsrocks
Replied by marsrocks on topic Reply from David Norton
Stoat, is there a dss color image of that part of the sky for comparison, or if not, can you obtain the red, blue, and green, so that a color image could be produced of it?
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16 years 8 months ago #19741
by Stoat
Replied by Stoat on topic Reply from Robert Turner
Hi Marsrocks, yes, you're right, you must be a natural at this! Of course that makes me wrong but being wrong is good for the soul. I've been looking at this tiny bit of sky for too long methinks.
Can you post up your scaling factor for the Bradford layer?
I'll delete that blinker I put up, maybe you could delete the Bradford / dss blinker where the bradford image is pretty murky. That's just to speed up the loading of the page for people without broad band.
At the moment Joe is most interested in green dot five but any dot not on the dss image but on the better bradford image, is to be looked at closely.
I don't think that the digital sky survey does rgb images. Red, blue, infrared and x ray are all that I've seen.
Can you post up your scaling factor for the Bradford layer?
I'll delete that blinker I put up, maybe you could delete the Bradford / dss blinker where the bradford image is pretty murky. That's just to speed up the loading of the page for people without broad band.
At the moment Joe is most interested in green dot five but any dot not on the dss image but on the better bradford image, is to be looked at closely.
I don't think that the digital sky survey does rgb images. Red, blue, infrared and x ray are all that I've seen.
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16 years 8 months ago #20908
by marsrocks
Replied by marsrocks on topic Reply from David Norton
Stoat, let me know the date and time of the post containing the blinking image you want me to delete to make sure I don't delete the wrong one.
Unfortunately, I can't give you a numerical value for the enlargement of the secondary image, as I had to enlarge it little by little, by hand, to get the match as close as possible.
Do you have a link where you obtain the original dss images? I may want to toy with the colors available (red, blue, infrared and x-ray) to see if it gives me any interesting results; though, the resulting image will be false color, and therefore will probably not be meaningful to the problem at hand.
Unfortunately, I can't give you a numerical value for the enlargement of the secondary image, as I had to enlarge it little by little, by hand, to get the match as close as possible.
Do you have a link where you obtain the original dss images? I may want to toy with the colors available (red, blue, infrared and x-ray) to see if it gives me any interesting results; though, the resulting image will be false color, and therefore will probably not be meaningful to the problem at hand.
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16 years 8 months ago #18143
by Stoat
Replied by Stoat on topic Reply from Robert Turner
Hi Marsrocks, I started to do that as well but had to leave it as I have a wall to paint.
Here's the link for the dss files. R.A is 11 27 9.6 Dec is -9 12 36.00
For the Height and Width I put in 17.6 and 17.1 but as that didn't come in at the right Bradford scale, you might want to experiment.
I think you can delete the second one of the three but it's just to speed up the thread loading for people on dial up. I'll ask Joe about it. It's his baby.
Here's the link for the dss files. R.A is 11 27 9.6 Dec is -9 12 36.00
For the Height and Width I put in 17.6 and 17.1 but as that didn't come in at the right Bradford scale, you might want to experiment.
I think you can delete the second one of the three but it's just to speed up the thread loading for people on dial up. I'll ask Joe about it. It's his baby.
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16 years 8 months ago #20630
by marsrocks
Replied by marsrocks on topic Reply from David Norton
Stoat, I used your ratio of 17.6 to 17.1 as I think that is very close to correct in the match. This is the link I used to obtain the information:
[url] archive.stsci.edu/cgi-bin/dss_form [/url]
I created two more blinks.
Before I forget, can you obtain the separate RGBs on the Bradford? That might help you determine whether the green pixels are stray pixels or real objects - depending on whether they occur on more than one frame.
The first blink is a false color I created using the poss2 red and poss2 blue. (Note, because it is false color, you can not rely on the color information it yields, but it does combine the data between the two separate color images, and therefore contains all possible information obtained in the red and blue bands, rather than just the red band.
[url] archive.stsci.edu/cgi-bin/dss_form [/url]
I created two more blinks.
Before I forget, can you obtain the separate RGBs on the Bradford? That might help you determine whether the green pixels are stray pixels or real objects - depending on whether they occur on more than one frame.
The first blink is a false color I created using the poss2 red and poss2 blue. (Note, because it is false color, you can not rely on the color information it yields, but it does combine the data between the two separate color images, and therefore contains all possible information obtained in the red and blue bands, rather than just the red band.
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16 years 8 months ago #20470
by marsrocks
Replied by marsrocks on topic Reply from David Norton
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