Hacking Satellites To Spot Gamma Ray Bursts 62
mustermark writes: "By reprogramming on the fly some of the instruments on satellites cruising the solar system, astronomers have pieced together an interplanetary "fishing net" to catch gamma-ray bursts, the most energetic explosions known in the cosmos. Lasting only seconds, they briefly outshine the entire universe but disappear before astronomers can get a fix on them. This latest hack, though, lets them triangulate a burst's position in a matter of seconds, catching them in the act."
Re:Attention Slashdot Readers - Your Freedoms at R (Score:1)
I still think something decidedly strange is going on...
Re:kinda interesting (Score:1)
Check out the link, pretty cool reading for history,science,math, and "cool tech stuff".
--Brandon
Re:Attention Slashdot Readers - Your Freedoms at R (Score:1)
I consider osm to be one of the most significant members of the
The thought of being sued for posting off-topic posts frightens me. Those of you who know me are aware that sometimes perform various experiments: I may post something that someone else has already posted or even something from an article to see whether the moderators will notice it. Other times my posts express views that go against the current, in order to stimulate thought from the Slashdot readers. If osm has been sued for posting stories that he has written himself, where will that get me? Lynched?
As for the takeover of the thread that you mention, is this for certain? Have the editors actually checked the IP addresses of all the posters, and were able to determin that it was osm who made all the posts? It seems very unlikely to me.
Je vous embrasse,
Philippe.
Re:Attention Slashdot Readers - Your Freedoms at R (Score:1)
GROW-UP
Picky little complaint about semantics (Score:3)
Sorry, had to get that off my chest. you can go back to reading useful posts now.
========
Re:redshift calculation (Score:1)
But I thought that was the whole point of this, to get a GRB located so we could steeer a visible light telescope over to it's part of the sky, and record the visible-light portion.
If it ain't broke, fix it 'til it is!
Possible revision of red-shift theory? (Score:1)
Consider the following scenario: A light beam is emitted from a super-dense object, and is thus forced to climb out of a steep gravity well. There is a loss of energy that occurs in this process, which in matter would manifest itself as a loss of momentum. However, a loss of energy in light can only be manifested as jump to a lower frequency.
Next, consider the possibility that our universe is closed, and that the four dimensional shape corresponds to that of a sphere (i.e. travelling in a straigh line from point A would eventually return you to point A). This would mean that there is a specific minimum curviture to space at any point in the universe. Light travelling across the interstellar void would be forced to traverse this curve and thus would gradually lose energy (red-shift) in the process. This would explain, perhaps, the "quantization" effect noticed in the patterns of red-shift of a wide variety of stars.
Re:Already done (Score:1)
From APOD [nasa.gov]...
Considerably more than 13.
--
How it works (Score:2)
The system works because the satellites can time the arrival of bursts of gamma rays very accurately (minute fractions of a second, though
it depends on the satellite). Since the gamma rays travel at the speed of light, they arrive at each satellite at a different times, and you can use this information to find the position of the burst in the sky. The timing info is stored and sent back to Earth, so it doesn't matter if there is a lag in sending the info back to Earth.
Since you can't see gamma rays, and each detector doesn't have spatial information, you can't create a picture, but you can create graphs of the gamma rays versus time. Plus, some of the bursts are also seen in visible light, as seen in the picture on the page.
It is true that this system has been around for a while, as it says in the article. But the IPN has become much more important recently with the loss of the Compton Gamma Ray Observatory, which reached the end of its mission and had to be crashed into the atmosphere. See: http://www.starstuff.org/default.asp?cover=/artic
CGRO used to produce nearly daily events, but
now that it is gone, this interplanetary network
will have to step up. Plus, with NEAR, there
is a third satellite, making determination of a unique position possible.
You can see the IPN notices sent out to astronomers here:
http://gcn.gsfc.nasa.gov/gcn/ipn/gcn_ipn.html
Nuetrons (Score:1)
"How much for a beer?" The bartender replies, "For you, no charge."
Goddamn monkey boys (Score:1)
Re:Whatever happened to beer? (Score:1)
Hello? Rob? Jeff? Kurt? Can we please get that part of the code working again?
Re:redshift calculation (Score:1)
Re:This IS NOT hacking, read the article. (Score:1)
Re:Attention Slashdot Readers - Your Freedoms at R (Score:1)
Not often overshining the universe... (Score:2)
Article about it for example here [stsci.edu].
Re:redshift calculation (Score:1)
Re:Whatever happened to beer? (Score:1)
Re:Already done (Score:1)
I find /. Science/Space news strange at times, they post things like this which is far from news, but my note on the first high-resolution imaging to GRB host galaxies [esa.int] which is truly great stuff, was rejected.
Where did it start? (Score:1)
bluemalamute [slashdot.org]
pictures (Score:1)
kick some CAD on my.netscape.com [netscape.com]
Accuracy... (Score:1)
For some reason I can't see this working very well. Whenever software is used to enhance hardware that has a different purpose, the outcome is never very good. I'm a little skeptical that this will triangulate to the degree of accuracy needed when identifying a single body in the sky.
Then again, if enough of these are out there, the triangulation may be quite precise. Perhaps 'triangulation' will be the wrong word!
redshift calculation (Score:1)
This time I have a question. I'm not likely to understand the answer, but why don't you try me?
How do you calculate the redshift of a gamma-ray burst. I'm not talking about the visible light portion, I'm talking about the gamma-ray portion. If the waves are attenuated by the object's physical movement away from us, first-off, wouldn't the waves be shifted into a different part of the spectrum, gamma rays being at the extreme, high-frequency end? Also, how do we know what the "original" frequency was, prior to the redshifted signal arriving, so we can calculate the amount of redshift.
I'm hoping this is an answer a normal human can understand, because I'm neither an astrophysicist, nor do I play one on TV, and if I did, I sure as hell wouldn't look like Jodie Foster! (what a hottie! Better than Natalie Portman if you ask me.)
If it ain't broke, fix it 'til it is!
Not news ... (Score:3)
I recently attended a lecture at Los Alamos National Laboratory on gamma ray bursts, and discovered that scientists have had this technology for some time. From the time a satellite detects a gamma ray burst and pinpoints its position and transmits a signal to an automatic ground-based telescope, to the time the ground-based telescope swings around and points at the gamma ray burster is six seconds. And this has been around for a while. Nothing new.
Now if this latest technology improves that time, then that would be interesting.
Re:Attention Slashdot Readers - Your Freedoms at R (Score:2)
This is a private discussion board, and Rob has every right to dictate when his open posting policy has been pushed too far. There are limits to free speech. You can not yell "fire" in a crowded theatre, and you do not have the right to drown out serious discussion on a private messaging system.
The communications that take place on /. are of the utmost importance in how we develop our Open Source initiatives, and require an atmosphere of absolutely scholarly respect in order for us to be successful. Trolling detracts from this so much that we are left unable to continue our conversations.
I was a part of the group that was drowned out by the Natalie-thon" last month, and it completely wrecked the discussions my colleagues and I were having. We could not post so much as a single sentence w/out suffering the childish ridicule of these trolls.
ENOUGH I say! We have suffered for too long already. File your suit, Andover. The true community of slashdot is 100% behind you.
Timing (Score:1)
The article - translated for geeks (Score:1)
It looks like a single satellite can know when it hears a gamma ray burst, but not where it comes from. (hence I used to word "hear", and not "see").
Astronomers can't really expect to triangulate the distance of the burst, they just want to know its position on the celestial sphere (so they can look with Hubble in visible light, say). So there are 3 unknowns: the coordinates on the celestial sphere, plus the "universal" time of the burst. With 3 satellites, each giving a local timing of the burst, you get 3 data values. Solve the equations, and off you go with the gamma-ray burst pinned down!
Re:Already done (Score:2)
They haven't discovered only one. There's thirteen recorded gamma ray bursts on record. They're exceedingly rare, though, so you'll never see an astrophysicist more excited than when a gamma ray burst is detected.
Re:Trolling for OSM! (Score:1)
This IS NOT hacking, read the article. (Score:3)
kinda interesting (Score:2)
...
now the question is, is this really big news? I'm not so sure anymore.
Re:How does this work? (Score:1)
Re:Attention Slashdot Readers - Your Freedoms at R (Score:1)
1- your post is completely off topic.
2- Slashdot is THEIR web site, and as such, can do what they want. and
3- Posters should take responsibility for their own actions/comments.
I agree with /. Slandering someone is illegal, as is posting copywritten information without the consent of the copyright holders. Have you ever thought of how Ms. Portman feels about the slander and what is posted about her here?
Grow-up will you? The world needs you to act your age, not your shoe size.
Re:Attention Slashdot Readers - Your Freedoms at R (Score:1)
But I mean a law suit for posting some jokes? I think it is going a bit too far.
Re:Attention Slashdot Readers - Your Freedoms at R (Score:1)
Sure, kid. Hey, shouldn't you be playing with your Lego's or something?
Re:Attention Slashdot Readers - Your Freedoms at R (Score:1)
Until then it's just my sneaking suspicion that something's not right in the troll world.
Re:Accuracy... (Score:1)
Re:Attention Slashdot Readers - Your Freedoms at R (Score:1)
Re:Attention Slashdot Readers - Your Freedoms at R (Score:1)
Sorry, me a troll? I just saw something I disagree with and I replied. Please, be careful before making such accusations. May'be check my history to see if I have trolled before.
I don't know what the lawsuit is about, but I stand behind
Why do you stand behind
Whatever happened to beer? (Score:1)
I have been recently thinking about beer. Beer is the nectar of Gods. We're not talking Guiness or Cerveza here, we're talking the real shit, Steinlager, Heineken, Pete's Ale.
The problem these days is that people can't appreciate good beer. Too many people just get wasted on cheap-ass Ice House, Coors, or even worse, Bud. And that is a shame.
In the old days, things were different. Beer, that was a commodity. Good, aged beer was valuable. People treasured those moments of enjoying a pint of cold, tasty lager with plenty of head. Nobody would touch an aluminium can, let alone beer in plastic.
Open up a can of MGD today, and you've set yourself up for some major disappointment. Firstly, aluminum leaves a nasty aftertaste in your beer. Secondly, MGD has absolutely no head. It looks like stale tea. Thirdly, it tastes like stale tea too.
Henceforth, I urge you people, don't drink cheap shitty beer!
_, . '__ .
'_(_0o),(__)o().
o(_,-o(_ )(),(__(_)oO)_
|^^/.........|......|......|......|......|.....
|^^|.........|......|......|......|......|.....
|^^|.........|......|......|......|......|.....
|^^|.........|......|......|......|......|.....
|^^\.........|......|......|......|......|.....
\^^'---|.....|......|......|......|......|
'----|......|......|......|......|......|
|......|......|......|......|......|
\......\......\....../....../....../
`"""""""""""""""""`
Whatever happened to beer? (Score:1)
I have been recently thinking about beer. Beer is the nectar of Gods. We're not talking Guiness or Cerveza here, we're talking the real shit, Steinlager, Heineken, Pete's Ale.
The problem these days is that people can't appreciate good beer. Too many people just get wasted on cheap-ass Ice House, Coors, or even worse, Bud. And that is a shame.
In the old days, things were different. Beer, that was a commodity. Good, aged beer was valuable. People treasured those moments of enjoying a pint of cold, tasty lager with plenty of head. Nobody would touch an aluminium can, let alone beer in plastic.
Open up a can of MGD today, and you've set yourself up for some major disappointment. Firstly, aluminum leaves a nasty aftertaste in your beer. Secondly, MGD has absolutely no head. It looks like stale tea. Thirdly, it tastes like stale tea too.
Henceforth, I urge you people, don't drink cheap shitty beer!
_, . '__ .
'_(_0o),(__)o().
o(_,-o(_ )(),(__(_)oO)_
|^^/.........|......|......|......|......|.....
|^^|.........|......|......|......|......|.....
|^^|.........|......|......|......|......|.....
|^^|.........|......|......|......|......|.....
|^^\.........|......|......|......|......|.....
\^^'---|.....|......|......|......|......|
'----|......|......|......|......|......|
|......|......|......|......|......|
\......\......\....../....../....../
`"""""""""""""""""`
Whatever happened to beer? (Score:1)
The problem these days is that people can't appreciate good beer. Too many people just get wasted on cheap-ass Ice House, Coors, or even worse, Bud. And that is a shame.
In the old days, things were different. Beer, that was a commodity. Good, aged beer was valuable. People treasured those moments of enjoying a pint of cold, tasty lager with plenty of head. Nobody would touch an aluminium can, let alone beer in plastic.
Open up a can of MGD today, and you've set yourself up for some major disappointment. Firstly, aluminum leaves a nasty aftertaste in your beer. Secondly, MGD has absolutely no head. It looks like stale tea. Thirdly, it tastes like stale tea too.
Henceforth, I urge you people, don't drink cheap shitty beer!
_, . '__ .
o(_,-o(_ )(),(__(_)oO)_
|^^/.........|......|......|......|......|.....
|^^|.........|......|......|......|......|.....
|^^|.........|......|......|......|......|.....
|^^|.........|......|......|......|......|.....
|^^\.........|......|......|......|......|.....
\^^'---|.....|......|......|......|......|
'----|......|......|......|......|......|
|......|......|......|......|......|
\......\......\....../....../....../
`"""""""""""""""""`
You bastards, you killed GRO! (Score:1)
on the Gamma Ray Observatory was the best thing we had for burst detection currently in orbit. It wasn't very good at locating individual bursts, but it was great at observing bursts nearly across the sky. BATSE's original task was to determine the statistical distribution of bursts across the sky, to determine whether or not bursts were galactic, inter solar system, or cosmological in origin. BATSE also could get great spectral resolution of a burst.
When it was determined beyond a statistical doubt that bursts were cosmological, work turned to locating an individual source. BATSE was still invaluable, for the aforementioned all-sky capability made BATSE a great early warning device to allow viewers on the ground opportunities to detect burst sources, if possible.
Of course, GRO and BATSE are gone, spread out over the Pacific. It's extremely disappointing to me that such a robust tool like BATSE was sunk for such a poor excuse, and with no other satellite with it's abilities available to back it up. It's a goddamn shame.
Explanation... (Score:1)
Re:Whatever happened to beer? (Score:1)
Re:Attention Slashdot Readers - Your Freedoms at R (Score:2)
Two points:
Re:Attention Slashdot Readers - Your Freedoms at R (Score:1)
Just for the record, you may want to go read up on some Supreme Court decisions. Your statement is false.
Re:Picky little complaint about semantics (Score:3)
All the spacecraft mentioned in the article are in orbit around either the Earth or the Sun. Thus, they are all satellites.
Chris Dolan
Re:Attention Slashdot Readers - Your Freedoms at R (Score:1)
Trevor, I'm not quite sure how you judge yourself to be a member of the "true Slashdot community." Judging by your user ID # (high 100k's) it seems that you haven't really been around here all that long.
Of course, that's not the only criterion to judge community membership by. I freely admit that I haven't been around much longer than you have (but then again, I don't claim to be part of the group that knows what's best for Slashdot). However, I don't think you or I really have much of a right to claim that the trolls, many of whom post at 0 or -1, irrevocably end any serious attempt at conversation. Don't like what they have to say? Raise the threshold and ignore them. They're making fun of you? Ignore them. If you don't like what the trolls are doing, ignore them.
Ugh. I've probably been trolled myself right here (and look at how quickly I disregard my own advice!) But I'm getting a little tired of people claiming that the trolls are ruining Slashdot. Hate to break it to you, but they're more a part of it than you or me.
Re:Attention Slashdot Readers - Your Freedoms at R (Score:1)
I agree with /. Slandering someone is illegal, as is posting copywritten information without the consent of the copyright holders.
Funny then why Andover files a lawsuit against the person slandering and hires a lawyer to defend itself after it has posted copyrighted information (read the MS Kerberos spec)
(All this is assuming, of course, that the original post was not a Troll which made up facts - not something I'm sure of)
Re:Accuracy... (Score:1)
-Bryan
Already done (Score:3)
Also possibly of interest is yesterdays astronomy picture of the day [nasa.gov].
Hacking? Ah Hacking... (Score:1)
But according to the article, they are using technology in a different and new direction to spot these 'gamma rays'.
We need a different headline; like 'Fishing for Gamma Rays'
Re:Lecture from Bruce Banner (Score:1)
Re:Trolling for OSM! (Score:1)
leave it up to nasa (Score:3)
Hacking Satelites for science (Score:1)
Now how much you wanna bet a CNNbot will say Cracking Satelites for Science perverting the whole Hacker/Cracker debate beyond the point of ridicule?
Ah well it's nice to see a story that doesn't make me want to say 9 Nine Hail Marys.
How does this work? (Score:1)
Also, doesn't it take a few seconds to ping satalites 300k miles away?
--Brandon
Lecture from Bruce Banner (Score:1)
Re:Lecture from Bruce Banner (Score:1)
a long time ago in a galaxy far far away (Score:2)
Hypernovas?
Or just Tarkin demonstrating the Death Star, the Ultimate Power in the Universe?
---
Re:Attention Slashdot Readers - Your Freedoms at R (Score:1)
I posted this [slashdot.org] before, but I'm going to repost it here because I think it contains some valid points that we need to think about:
- - - - - - - - - -
I know many of you are thinking, as I did, this is just another elaborate troll, but I did a little research and it turns out there is definitely strange activity going on in the troll camps [slashdot.org] (look back about 1-2 weeks in that sid to see what I mean).
I know quite a bit about how trolls typically operate, and I can tell you straight off that this is not typical behavior. I'm not so sure I buy this Andover lawsuit thing, but something is happening here. Before you all go off half cocked writing letters to the staff OR going nuts with moderating everything as "Troll" I think we need to find out what's really going on.
Consider that all of this has happened in the last 2 weeks: