UmbralRaptor changed the topic of #kspacademia to: https://gist.github.com/pdn4kd/164b9b85435d87afbec0c3a7e69d3e6d | Dogs are cats. Spiders are cat interferometers. | Космизм сегодня! | Document well, for tomorrow you may get mauled by a ネコバス. | <UmbralRaptor> egg|nomz|egg: generally if your eyes are dewing over, that's not the weather. | <ferram4> I shall beat my problems to death with an engineer. | We can haz pdf
<egg|anbo|egg_> raptop: hm, i have a magnitude which looks about right except it has the wrong sign,,
<raptop> egg|anbo|egg_: it's totally possible that it needs one more or fewer negative signs. Or flipping a multiply/divide inside a log
<egg|anbo|egg_> nah I think it is just a coincidence
<egg|anbo|egg_> trying to derive a formula for limiting magnitude (wavelength, eggsposure time, sensor temperature, aperture) which might be questionable to start with
<egg|anbo|egg_> and mostly having no idea what I am doing wrt noise
<egg|anbo|egg_> raptop: what would happen if you, e.g., cryogenically cooled hubble
<egg|anbo|egg_> would its limiting magnitude go up significantly? I guess not since nobody launches cryogenic visible/UV scopes?
<raptop> egg|anbo|egg_: well, it would reduce noise, andeg: SDSS does use cryogens, but therman noise isn't a huge deal in optical
<egg|anbo|egg_> oh
<raptop> ...I guess hubble counts as being fairly cooled since NICMOS
<egg|anbo|egg_> what are the other sources of noise
<egg|anbo|egg_> because I was modelling everything as being thermal
<egg|anbo|egg_> OK my formula says Hubble would reach a limiting magnitude of 2120 if it were cooled to
<egg|anbo|egg_> 15 K
<egg|anbo|egg_> in 30 s of eggsposure
<egg|anbo|egg_> conclusion: it is probably not thermally limited,,,
<raptop> radiation (ionizing), read noise, pixels varying in terms of sensitivity
<raptop> IIRC
<egg|anbo|egg_> hmm
<raptop> also I recall seeing a paper on arxiv at one point about encoding causing noise for really faint objects
<raptop> read noise is actually a big deal in some cases (source: staring at my simulations)
<egg|anbo|egg_> right so those are ~handwave handwave~ a constant noise term wrt KC-relevant variables?
<egg|anbo|egg_> i.e. mission-design-relevant variables
<raptop> yeah, read noise can be dealt with by exposing longer. the radiation aspect (especially cosmic ray impacts) might be worth kinda-sorta modeling, since that gets people to avoid the van allen belts and jupiter's current sheet of painful death
<egg|anbo|egg_> ah yes, good point
<egg|anbo|egg_> ... but how the hell do I find constants to plug in that model, since people ~do not observe where ionizing radiation is annoying
<raptop> I don't know, call up teledyne or ball?
<raptop> ...
<raptop> wait, would WeylandsWings be able to give a BOTE approximation?
<WeylandsWings> for?
<egg|anbo|egg_> noise in imaging coming from ionizing radiation
<egg|anbo|egg_> BOTE?
<WeylandsWings> back of the envelope
<WeylandsWings> and no
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<UmbralRaptop> blarg
<WeylandsWings> Maybe look at the rate of Chip issues from radiation (but flips and latch ups and the like) and use that data for a ccd with a modifier as ccds are more fragile?
<egg|anbo|egg_> hmmm now solving for the constants in my model gives noise that decreases with temperature
<WeylandsWings> Which is good
<egg|anbo|egg_> well, that would make things easier, yes
<egg|anbo|egg_> tired: cryogenic phase; wired: scalding phase
<UmbralRaptop> Molten silicon detectors
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<egg|anbo|egg> !wpn
* galois gives egg|anbo|egg an uranium bovine frustum
<WeylandsWings> !wpn
* galois gives WeylandsWings a linker
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<ishellraptop> !8 ORCAS?
<galois> ishellraptop: yes
<ishellraptop> !acr -add:BOTE Back Of The Envelope
<galois> Definition added!
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* ishellraptop stabs clouds
<ishellraptop> (specifically the ones over Mauna Kea)
* ishellraptop continues to stab
<ishellraptop> !wpn -add:adj orgone
<galois> Added adj 'orgone'
<ishellraptop> !wpn -add:adj deadly
<galois> Entry already exists!
<ishellraptop> !wpn -add:wpn radiation
<galois> Added wpn 'radiation'
<ishellraptop> !wpn
* galois gives ishellraptop a breaded enterprise
* ishellraptop stab stab stabbity stab stab
<ishellraptop> how is the humidity 100% at some of the telescopes
<ishellraptop> why do we have to have an atmosphere?
<ishellraptop> The dew point at UKIRT is NaN degrees. Is this bad?
<ishellraptop> ...is that lightning?
<ishellraptop> !wpn
* galois gives ishellraptop a regression
<ishellraptop> no observing was possible
* ishellraptop should attempt to sleep
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<egg|anbo|egg> !wpn whitequark
* galois gives whitequark a Turing-complete caustic editor
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<egg|anbo|egg> !wpn whitequark
* galois gives whitequark a dodecahedron
<egg|anbo|egg> these cats control the dodecahedra
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<UmbralRaptor> egg|anbo|egg: cats can control all six platonic solids, which can cause issues while playing D&D
<raptop> Huh, this ExoPag meeting has a seperate enterprise grade chat for Q&A
<raptop> Also, a painfully bureaucratic way of saying "black lives matter"
<raptop> !acr -add:ExoPAG Exoplanet exploration Program Analysis Group
<galois> Definition added!
<raptop> !acr -add:ExEP Exoplanet Exploration Program
<galois> Definition added!
<SnoopJeDi> so, are we excited about XENON's 3.5σ excess? http://resonaances.blogspot.com/2020/06/hail-xenon-excess.html
<raptop> Wasn't there a 4 sigma thing at the LHC at one point?
<SnoopJeDi> I mean
<raptop> I want to believe, but refuse to get excited
<SnoopJeDi> raptop, I believe there's been charm tetraquark excitement recently?
<SnoopJeDi> but don't know the story there
<raptop> hm
<raptop> Wait, isn't a tetraquark just two mesons in a trenchcoat?
<SnoopJeDi> lmao
<raptop> !!! TESS will observe serveral K2 fields during its eggstended mission
<SnoopJeDi> :o
<SnoopJeDi> raptop, does that mean follow-ups or extended search, or both?
<raptop> both, I think more for follow-up
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<SnoopJeDi> neat
<raptop> Hrm. SARS2 has halted work on commissioning NEID
<raptop> !acr -add:KPNO Kitt Peak National Observatory
<galois> Acronym already defined! Try !acr -redef:WTF When Taylor Fails
<raptop> KPNO?
<galois> KPNO: Kitt Peak National Observatory
<raptop> good
<raptop> Hrm, Roman's coronograph has a change at observing Jupiter analogs in the solar neighborhood
<raptop> Actual Jupiters, not like those planets at 50-200 au that Gemini did
<raptop> oh, wow, these have IWA of ~3 λ/D, and OWA of ~9-20 λ/D
<mofh> !u 🤦‍♀️
<galois> 🤦: U+1f926 FACE PALM
<galois> ‍: U+200d ZERO WIDTH JOINER
<galois> ♀: U+2640 FEMALE SIGN
<galois> ️: U+fe0f VARIATION SELECTOR-16
<raptop> mofh: someone saying silly things about the virus?
<raptop> ...apparently phosphine shows up in near-mid IR spectra of Jupiter
<raptop> More evidence of how much Jupiter hates life
<SnoopJeDi> !wpn mofh
* galois gives mofh a tetrahedron
<SnoopJeDi> !wpn raptop
* galois gives raptop a dodecagon
<SnoopJeDi> :O
<raptop> !wpn SnoopJeDi
* galois gives SnoopJeDi a germanium Higgs certificate
<raptop> SERVAL?
<galois> SERVAL: SpEctrum Radial Velocity AnaLyser
<egg|anbo|egg_> kitty
<raptop> hrm, overview of VERITAS
<raptop> VERITAS?
<raptop> !acr -add:VERITAS Venus Emissivity, Radio science, InSAR, Topography, & Spectroscopy
<galois> Definition added!
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<raptop> !wpn ANBOcat
* galois gives ANBOcat a plasmon
<raptop> !acr -add:IVO Io Volcano Observer
<galois> Definition added!
<raptop> ...I think we just had a timezone error
<raptop> ARIEL?
<raptop> !acr -add:ARIEL Atmospheric Remote-sensing Infrared Explorer Large-survey
<galois> Definition added!
<raptop> !how many acronyms
<galois> raptop: 427 acronyms
<raptop> !acr -add:AIRS Ariel Infrared Spectrometer
<galois> Definition added!
* raptop flips sign. 0 days since last use of a rainbow/jet colormap
<SnoopJeDi> !wpn -add:adj jet
<galois> Entry already exists!
<raptop> CHEOPS?
<raptop> !acr -add:CHEOPS CHaracterizing ExOPlanets Satellite
<galois> Definition added!
<raptop> ...though apparently a postdoc will use cubehelix
<raptop> Apparently you can do good science with a Planewave RC-20 (0.51 m) @_@
<raptop> Yeah, this is an amusingly COTS system
<raptop> (including a laptop sitting next to the telescope running the software)
<raptop> ...observations from the Lick Observatory parking lot
<raptop> !acr -add:PEAS Planet as Exoplanet Analog Spectrograph
<galois> Definition added!
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<raptop> ...Triton's surface may be as young as 10 million years? (2nd only to Io) o_O
* raptop stares at DAVINCI+
<raptop> How long until acronyms with emoji?
<WeylandsWings> raptop: be the change you want to see
<raptop> WeylandsWings: aaaaaaaaaa
<WeylandsWings> that might be hard to make an acronym from
<raptop> Though if we're going for silliness, I'd end up backronyming "nyaa" or something
<WeylandsWings> why not TROLL
<raptop> hm
<raptop> Bonus points if that's somehow a bridge
<egg|anbo|egg_> WeylandsWings: raptop: I see you don't know about the AAAAA https://fr.wikipedia.org/wiki/Association_amicale_des_amateurs_d'andouillette_authentique
<galois> [WIKIPEDIA] Association amicale des amateurs d'andouillette authentique | "L'Association amicale des amateurs d'andouillette authentique (AAAAA), dite aussi 5 A, regroupe des professionnels des métiers de bouche et de l'univers de la table (fabricants, restaurateurs, gastronomes connaisseurs de la charcuterie, critiques et chroniqueurs gastronomiques, en activité ou retraités…"
<WeylandsWings> egg|anbo|egg_: no i had not heard of that
<WeylandsWings> the most a's i know of in the states is AAA
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<whitequark> egg|anbo|egg_: are out of range integer assignments UB?
<whitequark> short x = 1000000L;
<egg|anbo|egg> I would think so?
<egg|anbo|egg> (I am not familiar with integer semantics though)
<egg|anbo|egg> but what else would it do?
<egg|anbo|egg> s/do/be/ what are verbs
<galois> egg|anbo|egg meant to say: but what else would it be?
<whitequark> 2's complement truncation
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<egg|anbo|egg> whitequark: it would be odd if this were defined only for assignment and not the rest of signed overflow semantics
<egg|anbo|egg> so I guess UB
<whitequark> right i assumed it's UB