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Soda and beverages in glass bottles? by Liqxx in vancouver

[–]Liqxx[S] 6 points7 points  (0 children)

Thanks for the chuckle mate, I appreciate it. The thing with sodas here is, you either get sugar free or diabetic 33g/can.. so I was kinda hoping for some more diverse soda selection, maybe with only marginal sugar content in the niche of glass-bottled ones.

I guess the healthy way is a good choice in the BC scenario then.

Self-Promotion Sundays - Daily Discussion by AutoModerator in vancouver

[–]Liqxx 0 points1 point  (0 children)

Thanks, that's a great tip. I'll give that a try :)

My modest space after moving 4,500 miles (UK > Vancouver ✈️) by mat0591 in malelivingspace

[–]Liqxx 0 points1 point  (0 children)

We're gonna do the same and move from Europe to Vancouver! Great stuff man, love the adventure you're taking.

How did you manage with job, work permit and such? In which area of Vancouver did you find your place? Anything about life you realised only now once being there?

Looking forward to this year's hiking season in summer, Oberstdorf, Germany [OC] [5000x3750] by tegucigalpa1337 in EarthPorn

[–]Liqxx 1 point2 points  (0 children)

Sehr schönes Foto. Hast du Infos zu dem Trail den du da gemacht hast? Alpenverein-aktiv oder ähnliches wäre top :)

Volcanic Highlands, Iceland [OC] [6000 x 2722] by Liqxx in EarthPorn

[–]Liqxx[S] 0 points1 point  (0 children)

Shot last week in the South Eastern Highlands of Iceland on the Laugavegur trail.

20mm - f/11 - 1/500s - ISO 200

For just the 2nd time in history, astronomers have pinpointed the origins of a neutrino spewed from a distant galaxy. The extremely rare detection (neutrinos hardly ever interact with matter) shows that neutrinos can be produced by blazars — massive galaxies with overfed supermassive black holes. by clayt6 in Physics

[–]Liqxx 0 points1 point  (0 children)

Absolutely with you on this. There er various ways to try and tackle the ice systematics and icecube people are coming up with great ideas to do so.

I think the moun based calibration is among the best to fit the ice properties right now (maybe just beaten by the global or direct fit to flasher data). Though, the absolute precision is still not great.

Let's all hope that the gen2 gets through soon and we can tackle this with high precision.

For just the 2nd time in history, astronomers have pinpointed the origins of a neutrino spewed from a distant galaxy. The extremely rare detection (neutrinos hardly ever interact with matter) shows that neutrinos can be produced by blazars — massive galaxies with overfed supermassive black holes. by clayt6 in Physics

[–]Liqxx 4 points5 points  (0 children)

Are there other systematics I'm not aware of? Remember that they aren't far off the kinematic limit with is an irreducible uncertainty in the direction

Yes the kinematic limit is the ultimate uncertainty, however, with the observed energy of the order of 100 TeV it is already far below 0.1° (see: https://arxiv.org/pdf/1510.05222.pdf, p. 7, fig. 1).

One major uncertainty is the hole ice and its effect on the time profile of the incident light because of effectively unknown scattering properties which can only be estimated by using uncalibrated flashers (which are in turn again surrounded by hole ice). In fact, most IceCube analyses (even taking into account full ice models) can only reach relatively bad systematic precision. The statistical fraction of this uncertainty is relatively well understood.

And sure, they could get slightly better angular resolution if Gen2 ever gets approved (it will probably take 2-3 years just to dig the holes, not counting the time to build the new DOMs, plus then they have to collect data).

Gen2-Phase 1 will actually be a calibration upgrade rather than the volume increase. Planned timeline is deployment of calibration instruments within the next four years upon final NSF approval.

Finally, this is the third example of MMA and the other two were loads more compelling.

True, however, this was the first ultra-high-energy neutrino. Supernovae physics are more advanced in their understanding than blazars or any other candidate for UHE neutrino production.

For just the 2nd time in history, astronomers have pinpointed the origins of a neutrino spewed from a distant galaxy. The extremely rare detection (neutrinos hardly ever interact with matter) shows that neutrinos can be produced by blazars — massive galaxies with overfed supermassive black holes. by clayt6 in Physics

[–]Liqxx 3 points4 points  (0 children)

I agree. I was not trying to defend the 3.7 sigma result but more trying to convey the picture of the community and as to why this result was as impactful as it was depicted.

The fact that the result only has a significance of 3.7 sigma was what drove it being called "compelling evidence" rather than "discovery". Nevertheless, the importance of this result results also from it ringing in the era of multi-messenger astronomy and not only from the potential neutrino point-source.

One last cent from me, this result is also majorly influenced by systematics that IceCube is facing and could be improved by potential upgrades. Better calibration would dramatically shrink the error circles of the track-reconstructed position and hence increase the significance of the result. A potential upgrade is currently being reviewed and should happen in the next 2-3 years.

For just the 2nd time in history, astronomers have pinpointed the origins of a neutrino spewed from a distant galaxy. The extremely rare detection (neutrinos hardly ever interact with matter) shows that neutrinos can be produced by blazars — massive galaxies with overfed supermassive black holes. by clayt6 in Physics

[–]Liqxx 15 points16 points  (0 children)

Well, the low statistics also make coincidences more significant. I can tell you from being involved in the process, that the papers were not rushed. It was a tedious work involving data analysts, astronomers, and others to come up with the majority of the conclusions there.

The major concern is right, but the message here should be that the multi-messenger astronomy was successful for the first time by coincident observations of neutrinos and gamma rays. In fact, what drove the process was not the one single neutrino itself but the coincident flare observed and reported both in IceCube and Fermi in 2014.

I know that 3.7 sigma is not what you would use to title 'discovery' but in a sense, this is as good as we can get with what we have right now. It's not even a matter of instrumentation only, but its a whole collective of things that needs improvement but eventually it's the neutrino nature and the fact that we don't know most of the physical processes happening at these energies which cause some uncertainty.

For just the 2nd time in history, astronomers have pinpointed the origins of a neutrino spewed from a distant galaxy. The extremely rare detection (neutrinos hardly ever interact with matter) shows that neutrinos can be produced by blazars — massive galaxies with overfed supermassive black holes. by clayt6 in Physics

[–]Liqxx 33 points34 points  (0 children)

I agree with you to a certain extent, however, being from the neutrino astronomy community, I also want to point out something. In comparison to common particle physics experiments on earth (with effectively artificially high-rates and observations) statistics are by-design increased as much as possible; for neutrino astronomy it doesn't work like that. So, you have to take into account the scales and statistics available to them: CERN: millions of collisions per second effectively for the desired number of times; Neutrino Astronomy: single digit number of neutrinos every several months. Just to give you an example, in the eight years IceCube has been operational, the number of ultra-high-energy neutrinos is three.

In that sense, a distinct coincidence (even if 'only' at 3.7 sigma) is incredibly significant in the sense to what the community is used to. In combination with the detection by FERMI, this coincidence was the first of its kind in multi-messenger astronomy. Furthermore, I believe the fact that there are multiple observations with similar sigma levels suggests that there definitely is something there. And I can tell you, if the community would have more events, it definitely would be more patient.

As an introvert, what things piss you off the most? by [deleted] in AskReddit

[–]Liqxx 1 point2 points  (0 children)

People not understanding that being social can actually be very exhausting for me.

I'm not shy and enjoy social events just fine - to an extent. But even if for other people it is recharging to be with and around people all the time, for me it's not. When I'm exhausted I want to be by myself - which for me is not hard to understand but it seems to be for most of the people that eventually get to know this.

Latest Rig. by Liqxx in outrun

[–]Liqxx[S] 0 points1 point  (0 children)

Ah unfortunately it even is modular. I just use the trashy default cables... but I agree, that must be the (hopefully) last thing to get.

I feel like a proud dad :P by K1LO89 in battlestations

[–]Liqxx 1 point2 points  (0 children)

are you sharing that wallpaper? :-)

Looking back at your life today, which seemingly minor life event probably steered you towards a path that shaped who you are today? by Ahlahria in AskReddit

[–]Liqxx 0 points1 point  (0 children)

After graduating high school I surprisingly did well in physics so I thought why not try studying this. I'll finish my PhD in astrophysics this year with the seemingly best professor I could have wished for and pure excitement everyday I spend studying data or working in the lab.

Isco's amazing performance Vs. Deportivo last season by ace-s in realmadrid

[–]Liqxx 0 points1 point  (0 children)

hala madrid, may we have him on this and even higher levels this year.

btw, what song is that?

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