Visualization of S5R2 / S5R3 difference

Bikeman (Heinz-Bernd Eggenstein)
Bikeman (Heinz-...
Moderator
Joined: 28 Aug 06
Posts: 3,516
Credit: 468,780,045
RAC: 57,038

So, as the frequency

So, as the frequency increases, the "interesting" sky-positions with a high "score" move closer to one spot. What will happen if the frequency is increased even further:

a) a new "mirrored" rainbow pattern will show up "east" of the first one
b) the pattern will vanish into an all-noise distribution
c) a black hole will open in my CPU and will terminate life as we know it on this planet

Make your bet :-)

CU
Bikeman

Mike Hewson
Mike Hewson
Moderator
Joined: 1 Dec 05
Posts: 6,213
Credit: 136,127,982
RAC: 41,368

RE: So, as the frequency

Message 74805 in response to message 74804

Quote:

So, as the frequency increases, the "interesting" sky-positions with a high "score" move closer to one spot. What will happen if the frequency is increased even further:

a) a new "mirrored" rainbow pattern will show up "east" of the first one
b) the pattern will vanish into an all-noise distribution
c) a black hole will open in my CPU and will terminate life as we know it on this planet

Make your bet :-)


Flip on Discovery Channel from time to time :-)

I go for option (a) - sort of like two peacocks, friendly like, posing together for a photo... :-)

Cheers, Mike.

I have made this letter longer than usual because I lack the time to make it shorter. Blaise Pascal

ohiomike
ohiomike
Joined: 4 Nov 06
Posts: 80
Credit: 6,453,639
RAC: 0

RE: RE: LOL. I was

Message 74806 in response to message 74803

Quote:
Quote:

LOL. I was going to say it looks like a rainbow.

Now that you mention it .... yes, kind of :-).

I guess software engineers like me should get more in contact with nature from time to time :-).

CU
Bikeman


I've found that rainbows in computer rooms are NOT good things. :)


Bernd Machenschalk
Bernd Machenschalk
Moderator
Administrator
Joined: 15 Oct 04
Posts: 4,027
Credit: 215,871,472
RAC: 82,489

RE: I've found that

Message 74807 in response to message 74806

Quote:
I've found that rainbows in computer rooms are NOT good things. :)


You mean the classic server rain?

BM

BM

Thunder
Thunder
Joined: 18 Jan 05
Posts: 138
Credit: 46,754,541
RAC: 0

RE: RE: I've found that

Message 74808 in response to message 74807

Quote:
Quote:
I've found that rainbows in computer rooms are NOT good things. :)

You mean the classic server rain?

BM

Now THAT was ugly. I'm sure at least a few guys were ready to grab a 208 3-phase line and just jump in the pool to end it all.

I've been enjoying reading your use of Topcat, Bikeman! Just to show it's versatility, I've actually used it to produce visualizations from weather forecasting model output. Thankfully I didn't have to do any of the setup since it was all configured for this use in advance, but I honestly didn't know that it's primary use was for astronomical data! :)

Bikeman (Heinz-Bernd Eggenstein)
Bikeman (Heinz-...
Moderator
Joined: 28 Aug 06
Posts: 3,516
Credit: 468,780,045
RAC: 57,038

RE: RE: So, as the

Message 74809 in response to message 74805

Quote:
Quote:

So, as the frequency increases, the "interesting" sky-positions with a high "score" move closer to one spot. What will happen if the frequency is increased even further:

a) a new "mirrored" rainbow pattern will show up "east" of the first one
b) the pattern will vanish into an all-noise distribution
c) a black hole will open in my CPU and will terminate life as we know it on this planet

Make your bet :-)


Flip on Discovery Channel from time to time :-)

I go for option (a) - sort of like two peacocks, friendly like, posing together for a photo... :-)

Cheers, Mike.

Hi!

I totally forgot to provide the next image for even higher frequencies:

The arcs get smaller, and weaker. (No peacocks, sorry ;-) ).

So in fact, it seems like the pattern is a set of roughly concentric arcs.

I found this paper (PDF) that might explain what we see here. Even tho I think the context is a bit different (coherent search vs coherent and incoherent steps combined), it still seems that the pattern shown in the E@H app results are somehow related to the "circles in the sky" described in the paper.

I guess at some time in the future the data for the intentionally injected ("simulated") pulsar signals in the raw data will be published and we will be able to tell whether we are actually looking at what a pulsar signal may look like in S5R3 E@H output.

CU
Bikeman

Mike Hewson
Mike Hewson
Moderator
Joined: 1 Dec 05
Posts: 6,213
Credit: 136,127,982
RAC: 41,368

Ah yes, the peacocks are out.

Message 74810 in response to message 74809

Ah yes, the peacocks are out. This is why I never win Lotto.

We're still here discussing the matter, so (c) is evidently gone too.

Probably (b) then ......

......

......

A Dispersing Peacock perhaps? You know, the type that gradually loses it's coherence 'cos of Quantum.

Or Doppler Peacock fading onto an event horizon, or

it could be Road Kill Peacock .... :-)

Cheers, Mike.

[ NB. I'll have to go back to my local Peacocks Anonymous now ]

I have made this letter longer than usual because I lack the time to make it shorter. Blaise Pascal

Bikeman (Heinz-Bernd Eggenstein)
Bikeman (Heinz-...
Moderator
Joined: 28 Aug 06
Posts: 3,516
Credit: 468,780,045
RAC: 57,038

Some zoom pictures from a

Some zoom pictures from a part of the rainbow pattern (ca 5000 sky-points):

First, the color scale marks the Hough significance ("score") values. This doesn't look that unusual , even tho the values are higher than average:

When the frequency scale is used for the colors, the rainbow pattern appears, which is unusual. The average WU will contain more random patterns of frequencies.

The nice thing is that this pattern can extend all over the sky, even far away from the absolute peak. So no matter what partitioning of the sky will be used for S5R4, if a screen saver had access to all candidates, it could actually look for this pattern and highlight it.
Gary ;-) ?

Bikeman (Heinz-Bernd Eggenstein)
Bikeman (Heinz-...
Moderator
Joined: 28 Aug 06
Posts: 3,516
Credit: 468,780,045
RAC: 57,038

Sorry, I meant Mike ..you

Sorry, I meant Mike ..you wanted to try out the Do-it-yourself Screensaver idea, right?

EDIT:

I love TOPCAT :-)


Chart for a single skypoint (the one under the cross-hair in the chart above), with varying frequency and spindown (ca -4e-9 Hz/s, about 0.12 Hz per year).

(peak at f=645.5928414011 alpha=2.86458 delta=0.4992 f1dot=-4.3131E-9)

CU
Bikeman

Gary Roberts
Gary Roberts
Moderator
Joined: 9 Feb 05
Posts: 5,491
Credit: 63,607,345,382
RAC: 53,420,332

RE: Sorry, I meant Mike

Message 74813 in response to message 74812

Quote:
Sorry, I meant Mike ..you wanted to try out the Do-it-yourself Screensaver idea, right?

That's quite OK. You can attribute to me, directly or indirectly, all the skills, competencies, interests and abilities of a superior intellect as much as you want and anytime you like :-).

Quote:
I love TOPCAT :-)

I'm very glad you mentioned that!

We would never have figured it out otherwise :-).

On a more serious note, I hope you have an enjoyable little break next week. However, if you really want a holiday experience, you should try the land of Oz sometime :-).

Cheers,
Gary.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.