First Look at Kepler SETI Candidate Signals


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Profile Matt Lebofsky
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Message 1183040 - Posted: 5 Jan 2012, 21:20:22 UTC

Check out our First Look at Kepler SETI Candidate Signals - No ET yet.
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Message 1183054 - Posted: 5 Jan 2012, 22:26:29 UTC - in response to Message 1183040.

Check out our First Look at Kepler SETI Candidate Signals - No ET yet.


Thank you for the information, signals do have a small, (~10KHz?) bandwidth,
so this could be a 'transmitter', not a planet or cooled down star?


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Message 1183089 - Posted: 6 Jan 2012, 2:58:04 UTC - in response to Message 1183054.
Last modified: 6 Jan 2012, 2:58:45 UTC

I think the article explained fairly well that natural sources don't tend to have narrow band sources.

These signals look similar to what we think might be produced from an extraterrestrial technology. They are narrow in frequency, much narrower than would be produced by any known astrophysical phenomena, and they drift in frequency with time, as we would expect because of the doppler effect imposed by the relative motion of the transmitter and the receiving radio telescope.


I assume this is where the v7 Wu's are going to take us.
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Message 1183129 - Posted: 6 Jan 2012, 6:38:48 UTC

Eric,
While I anxiously await further information from additional analysis on these signals, the immediate question I have to ask is, what are "v7 WUs?" I'm also confused as to the dopler effect causing drift. As I understand it, if the distance between the transmitter and receiver are increasing or decreasing at a fixed rate, there would be doppler "shift", and not a drift. If I understand the pyhysics correctly, (and I am not a physics type at all) a frequency drift would indicate that the distance between the transmitter and receiver was not changing at a fixed rate, but at an increasing or decreasing rate. If I'm reading the charts correctly, it would appear that the speed at which the transmitter is travelling away from earth (relative to earth) is increasing over time. Kinda like what I would expect to see from the Voyager deep space probe as it leaves our solar system with a gravitational slingshot into deep space. Some clarification explaining why there is a frequency drift vs. shift would be appreaciated in your deeper analysis post. Obviously, I'm not as educated as well as others in these matters and welcome the opportunity to understand. Thanks.
-Carl

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Message 1183445 - Posted: 7 Jan 2012, 7:32:28 UTC
Last modified: 7 Jan 2012, 8:06:46 UTC

Hello.

first , i want to say i m kinda new (to compare to most of you)

at some point i was computing and crunch data for seti, and then i left to go compute for einstein cause i had the impressions that i was doing that for nothing.
and lately i recieved an email about Seti will soon examinate and listen the kepler candidate signals which i think is the best idea ever these past few years...

and i comeback with alot of excitations. and alot of expectations. (sorry, very sorry for my english, i hope you still understand what i try to say)

and,
i didnt thought it was already there ...

Check out our First Look at Kepler SETI Candidate Signals - No ET yet.


so,
my question is : where and what we need to do for getting these tasks ?

cause listening ''real planets'' that we are discovering is in my mind , the most common sense. (i have alot of faith in that)
and i wish so much to see my computer working to this Kepler planets signals project.

where do i need to click, or subscribe, to go , or whatever to get my computer crushing these Kepler discoveries signals ?

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Message 1183503 - Posted: 7 Jan 2012, 16:04:36 UTC

Looking at the plots I found them resembling the "waterfall" plots given in a demo of OpenSonATA at www.setiquest.org. But those were signals emanating by the Voyager spacecrafts, if I remember well, not by Kepler sources. I sometimes find it difficult to grasp the difference between each SETI effort...
Tullio
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Message 1183680 - Posted: 8 Jan 2012, 5:20:26 UTC - in response to Message 1183129.

Eric,
While I anxiously await further information from additional analysis on these signals, the immediate question I have to ask is, what are "v7 WUs?" I'm also confused as to the dopler effect causing drift. As I understand it, if the distance between the transmitter and receiver are increasing or decreasing at a fixed rate, there would be doppler "shift", and not a drift. If I understand the pyhysics correctly, (and I am not a physics type at all) a frequency drift would indicate that the distance between the transmitter and receiver was not changing at a fixed rate, but at an increasing or decreasing rate. If I'm reading the charts correctly, it would appear that the speed at which the transmitter is travelling away from earth (relative to earth) is increasing over time. Kinda like what I would expect to see from the Voyager deep space probe as it leaves our solar system with a gravitational slingshot into deep space. Some clarification explaining why there is a frequency drift vs. shift would be appreaciated in your deeper analysis post. Obviously, I'm not as educated as well as others in these matters and welcome the opportunity to understand. Thanks.
-Carl


V7 are the new WU's that are being tested on seti beta. if you need an explanation about the drift and gaussians see this page

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Message 1184027 - Posted: 9 Jan 2012, 13:21:30 UTC
Last modified: 9 Jan 2012, 13:50:07 UTC

i am french ^^

KID 4139816

KOI-812 (3 planets)

RA 19h 04m 18.99s, Dec 39d 16m 41.95s

--------------------------------------

KID 4725681

KOI-817 (1 planet)

RA 18h 55m 27.93s Dec 39d 53m 53.09s

----------------------------------------


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Message 1184072 - Posted: 9 Jan 2012, 16:50:18 UTC - in response to Message 1183129.

Hi Carl,

I think you already got an answer to what v7 is, so I'll try to answer your Doppler drift question. It turns out signals we detect from space don't have a constant relative velocity, but have a changing velocity. That's because the receiver (and possibly the transmitter) are in accelerated motion. That's due primarily due to the rotation and orbital motions of the Earth and the transmitter or the planet that it's on.

ET could, of course, correct for the motions of its own transmitter, but unless they knew the orbital and rotational speed and the location of our receiver on the Earth, they couldn't correct for that.

As an aside, since the same narrow band features are seen on and off source, it's certain that they are RFI.

Eric
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Message 1184075 - Posted: 9 Jan 2012, 16:54:45 UTC - in response to Message 1183445.


my question is : where and what we need to do for getting these tasks ?


This was the first run of a pipeline that uses incoherent dechirping and is therefore less sensitive than SETI@home, but fast enough to run locally. A student is working on writing a splitter that will turn the Green Bank data into SETI@home workunits. I'll try to get you an ETA on that after the science meeting on Wednesday. We haven't decided whether a separate application will be required for processing these workunits. I'm hoping not.

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Message 1184160 - Posted: 9 Jan 2012, 21:20:23 UTC - in response to Message 1184072.

question:

when NASA is communicating with the Moon and/or their satellites (kepler / voyagers / or ect) are they getting some ... Doppler drifts ? or shifts ?

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Message 1184190 - Posted: 9 Jan 2012, 22:31:52 UTC - in response to Message 1184160.

Typically such transmissions are corrected by the transmitter for the rotation of the earth and any orbital acceleration. Since those are known accelerations a fairly simple program or digital circuit does the job.
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Message 1184299 - Posted: 10 Jan 2012, 9:24:54 UTC - in response to Message 1184190.

kk, thanks alot for the answers :))

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Message 1184391 - Posted: 10 Jan 2012, 22:35:17 UTC - in response to Message 1184075.
Last modified: 10 Jan 2012, 22:37:49 UTC


my question is : where and what we need to do for getting these tasks ?


This was the first run of a pipeline that uses incoherent dechirping and is therefore less sensitive than SETI@home, but fast enough to run locally. A student is working on writing a splitter that will turn the Green Bank data into SETI@home workunits. I'll try to get you an ETA on that after the science meeting on Wednesday. We haven't decided whether a separate application will be required for processing these workunits. I'm hoping not.


OHHHHHH!
i just saw your answer on my previous question (so sorry to not have saw before - my bad)

sweet !

i wish so much to crunch these data, i sincerly hope that one day i ll get some.
i know there are billions of billions of stars everywhere, but we know for sure there are planets in these systems, and some have earth-like size in the green zones ....
i know, i know i have so much hope !!


thanks you Eric for your reply :)

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Message 1184898 - Posted: 13 Jan 2012, 5:14:20 UTC

Hi there,

Im a newbie on this things of signals etc ...

Ive readed http://www.planetary.org/explore/topics/search_for_life/seti/alien_signal.html
( Amir Alexander and Eric Heien Article ), that is very cool by the way, but it still rest a question for me.

If we see that gaussian signals what we do?
A print screen ? ( if print screen works with screensaver .... ive never tested )

or record that? i dont see how to record that if we need to click on somewhere to start recording, and like that bye bye screensaver ....

Sorry for my bad english ( im Portuguese ) and for my very very newbie question but well ... im learning and i love this subject :-)

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Message 1184977 - Posted: 13 Jan 2012, 15:13:57 UTC - in response to Message 1184898.

Hi there,

Im a newbie on this things of signals etc ...

Ive readed http://www.planetary.org/explore/topics/search_for_life/seti/alien_signal.html
( Amir Alexander and Eric Heien Article ), that is very cool by the way, but it still rest a question for me.

If we see that gaussian signals what we do?
A print screen ? ( if print screen works with screensaver .... ive never tested )

or record that? i dont see how to record that if we need to click on somewhere to start recording, and like that bye bye screensaver ....

Sorry for my bad english ( im Portuguese ) and for my very very newbie question but well ... im learning and i love this subject :-)

Hi,

You don't need to record anything. You don't even need to run the screensaver if you don't want to. The software will make note of the gaussian(s) and whatever else it finds and return the note to the lab. Eventually (and I have no idea if this is ongoing or all the data is just sitting there, waiting for someone to look at it) all the things that have been noted will be analyzed to see if they are really anything or just random noise. Someone else can probably explain this better than I.

I'll offer you one English lesson. The past tense of the verb "read" (pronounced reed) is "read" (pronounced red). I know, this is very confusing, and a lot of people who have spoken English all their lives don't get it right either.

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Message 1185025 - Posted: 13 Jan 2012, 20:04:07 UTC

Have a look for NITPCKR. It is a program to check the database for candidates. It is only running sporadic right now because the project is lagging a suitable machine for this purpose.

Christoph
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Message 1185141 - Posted: 14 Jan 2012, 4:43:04 UTC - in response to Message 1184977.

Hi,

You don't need to record anything. You don't even need to run the screensaver if you don't want to. The software will make note of the gaussian(s) and whatever else it finds and return the note to the lab. Eventually (and I have no idea if this is ongoing or all the data is just sitting there, waiting for someone to look at it) all the things that have been noted will be analyzed to see if they are really anything or just random noise. Someone else can probably explain this better than I.

I'll offer you one English lesson. The past tense of the verb "read" (pronounced reed) is "read" (pronounced red). I know, this is very confusing, and a lot of people who have spoken English all their lives don't get it right either.

Hi N9JFE,

Thanks for the feedback, and also thanks for the english lesson !
For me the "sound" of "Readed" it was good and cool, is for that ive wrote "readed". i dont have liked the sound of "read" on past tense ... dont know why ... but well ... thanks for the lesson :-) Now i know !

So ... resuming, today i dont have time to do that but in the next days i think yes ... can you please Christophe talking about that machine you need? Or the project ? Maybe we found one .... or maybe not :-) ... Who knows?

Thanks also for the little explanation of the " Labs Side" N9JFE. Im gonna read a little more dont know where but well ... im gonna read ....

Cheers !

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