January 29, 2007

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January 11th, 2007 - Posted by Stefano
Backend stability check
The backend has been updated to perform stability checks using a robot that periodically scans the library. Unstable fits are marked as such on the the database view.

January 3rd, 2007 - Posted by Stefano
On self-consistent integration
User EricFDiaz posted a useful essay about the importance of turning on integration before posting the system on the backend. The post has been made "sticky" on the forum.
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Backend bugfix
Happy new year! The "inf" χ2 has been fixed for all fits, and the database should now reflect the corrections. Thanks for all the reports!

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2007-01-29
Fit of 47uma_4datasets
5 planets (χ2 = 7.54)
by smkolins

2007-01-28
Fit of systemicJR_415
3 planets (χ2 = 1.01)
by Tomasz

2007-01-28
Fit of systemicJR_415
2 planets (χ2 = 1.13)
by Tomasz
  

 
Latest comments
1-planets fit of systemicJR_266 by markk
01.29.07, 02:46:05
japf says: Please se the Sticky on "overwriting fits".Japf
3-planets fit of systemicJR_271 by tomdickens
01.28.07, 23:18:04
EricFDiaz says: It is a tough system, Tom. But hey...at least you improved on my Chi^2 value. Some systems are like that; no matter what you do they just come out with incredibly high Chi^2 values. Eric
1-planets fit of systemicJR_266 by markk
01.28.07, 19:59:55
tomdickens says: OK, apparently Markk owns this system!!! I uploaded it twice and both times, as you can see, it was assigned to Markk! He probably doesn't want to be blamed for my lousy fit...
3-planets fit of systemicJR_271 by tomdickens
01.28.07, 19:38:09
tomdickens says: This one is tough. The perturbations are so strong it is hard to get the Levenburg-Marquardt polishing started in the right local minimum. Plus it's very slow.
4-planets fit of HD169830 by EricFDiaz
01.28.07, 16:56:45
EricFDiaz says: F-Test Result: 1.0656 Probability: 0.7689 - The stability of this fit is highly dubious as well.
4-planets fit of HD169830 by EricFDiaz
01.28.07, 16:54:13
EricFDiaz says: F-Test Result: 1.0607 Probability 0.7854 - The stability of this fit is highly dubious.
3-planets fit of HD169830 by thiessen
01.28.07, 16:41:15
EricFDiaz says: Hi Chris, It's interesting to note that you and I got results for this system which are extremely close--not identical but extremely close. I didn't know until I looked at your fit and the others that I hadn't done one for this system. So, I decided to do one. Can you imagine my surprise when I got practically the same result as you? And, both our fits are not that different from Greg's fit either. Maybe we have something here. I wonder what would happen with the introduction of a fourth planet...
2-planets fit of systemicJR_513 by Olweg
01.28.07, 11:38:25
Olweg says: Stable for 1000 years, 7% probability
 

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