The Consortium Newsletter - Spring 2019

News from the bridge ear Euclidean and friends of Euclid DJust one hundred years ago, on May 29 light on our understanding of the laws of 1919 a eclipse permitted to Arthur nature. But now, it is time to plunge into and his team to measure for the the dark and use Euclid to reveal the unknown lying behind dark energy. You are all embarked for years, doing your part first time a gravitational deflection of light- on this exceptional adventure. The Euclid effect providing a first scientific evidence of- the validity of Albert Einstein theory of rel instruments are close to delivery this year ativity. A hundred years later, we are look and the satellite close to its final assembly.- ing at the next 1000 days to come that will Still a few nuts to tighten and lines of code- bring Euclid to space to use gravitational clidto correct Consortium and we for are yourthere. enthusiasm Thank you eveand deflection, in order to explore dark energy ryone at Thales, Airbus, ESA and in the Eu and, ironically, whether the description of- days the accelerated expansion of the Universe dedication to make Euclid launched in 1000 . conflicts with Einstein’s theory of gravita - tion. Yannick Mellier We are indeed lucky to live this time of dis coveries in physics, like the Higgs boson and the gravitational waves that put much

Table of contents From the editors 1 6 2 9 SGS Scientific challenges 12 The3 EC Meeting 2019 In Helsinki The Morphology Work Package 12 Theoretical Priors in the Hunt for Dark Energy ComingsThe Euclid and Science Goings Archive in the SGSSystem 14 Group 4 Science Ground Segment Design Review EuclidUpdate progress from thereport Theory from ESA Science 5 Working The Euclid Consortium Newsletter - Spring 2019 T T e oe mle Eci meig (aae Day, (Garage meetings Euclid smaller some be also will There Building. Main university the in Helsinki, of University the by offered ception re a be will there evening Thursday On only. and Friday isdedicated to splinter meetings the in meetings sessions morning andplenary in theafternoon, splinter have we Thursday, Wednesdayand On Hall. City the City at Helsinki of the by reception the with ends and talks plenary to dedicated is Tuesday, day, first The breaks, oratthesocialevents. par to and ticipate indiscussions – inthesessions, during development mission the about news latest the share to meeting, consortium annual this join to invited are members EC All centre ofdowntown Helsinki. verythe at hall) concert conference(and center a Hall, Finlandia at held is meeting The June. 7 Friday, on ends and June 4 Tuesday, on opens meeting The Finland. of capital the Helsinki, in he E sinki welcome you to this year’s EC meeting EC year’s this toyou welcome sinki The EC members from the University of Hel uclid C onsor tium M eeting 2019I - - - operation inEurope in1975. summit the meeting of the Conference onSecurityandCo- including events, international many for venue the been has it and Aalto, var centre was designed by the Finnish architect Al conference The nights. white northern the ence youtoso close solstice is summer It experiwill This is the best time of the year to visit Helsinki. physics.helsinki.fi/ foundbe Moreat can details north ofdowntown, onMonday, 3June. the University of Helsinki Science Campus, 5 km at Workshop) Career Early and Team, System sible, sinceitishigh season. pos youras soon book as and accommodations register to you encourage We city. the explore to participants the foreasy makesit location Its n on behalf ofthe Local Organizing Committee H Hannu Kurki-Suonio andElinaKeihänen elsinki http://euclid2019. - - - The Euclid Consortium Newsletter - Spring 2019 T f ie n sae μ n Σ Te parametrize They Σ. and μ scale, and time of Structure (LSS) state, w(a). Deviations at the level of of equation evolving an into encoded is verse model intheexpansioncal history oftheUni (ΛCDM) matter Dark Cold Lambda standard the from deviation Any [3]. functions gravityof nomenology intoDE and of handful a ized frameworks, that compress the broad phe interfaceparameter through is to data wayscosmological with best our of one Currently ergy puzzle. phenomenologies, possibly solving the dark en diverse of plethora a reproduce can It motion. of equations order second obeying field scalar dynamical a with graviton massless the pany the class of Horndeski gravity [2], which accom in fall models the of Many [1]. theories tational gravi of landscape scattered very a to leading ergy (DE) ity. In view of the conundrum posed by grav of descriptions alternative with up come to efforts been have there Relativity, of General theory his formulated Einstein since Ever [7]. EFT techniques offer a very powerful han powerful very a offer techniques EFT [7]. (EFT) eragingof the application fullytechniques,lev numerical theoreticaland lenges with a unique integrated combination of chal these tackled have we years, past the In mentary bounds. comple such account intotake cannot it hence perturbations, scalar for designed exclusively is framework (μ,Σ) The [6]. DE of models eral sev constraining effectively gravity, of speed the on improvedbound drastically a to led has 2017 in merger star neutron binary a of tion observa multi-messenger revolutionary The tensor modes as probed by gravitational waves. example for probes, different among synergies on emphasis growing with , in shift paradigm important an witnessing Wealso are derstanding ofgravity oncosmologicalscales. un better a into constraints anticipated these translate to then is challenge pressing The [5]. percent few a to constraints these reduce to es promis Euclid but [4], 20-100% order of are Σ and μ weak on respectively.bounds lensing, Current and clustering galaxy in modifications heoretical ehd t csooia perturbations cosmological to methods the number of alternativesof number the exploded, are encoded into two functions twointo encodedare P riors effective field theory effectivefield

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------for data, aiding model-independent tests of gravity. cipled physics information into cosmological prin incorporateto priors theoretical building eftcamb.org/ ( EFTCAMB public solver the Einstein-Boltzmann using done be can This gravity. ki Horndes of case the for Fig.1 in shown as LSS, of phenomenology the on gravitytheories able vi of predictions project to framework logical phenomeno the with method EFT the bining com on relies forward way promising very A on thespeedofgravity. ing to exploitthe complementary constraints of tensors and scalars are treated jointly, allow para are metrized at the level of the DE action, the dynamics and gravity since Additionally, [8]. instabilities gradient and ghosts from free those e.g. theories, viable physically to sively exclu effort analysis data the direct to lowing underlyingtheory,the of stability the on al dle gravity (Solar System) with grey striped and check and striped grey with System) (Solar gravity tions ofphysical andlocal (Stability) tests viability of condi general by induced cuts main the show cally (cT=1)(redgravity speed of cloud)We [6]. schemati the on constraint the imposing after narrows cloud predicted phenomenology ofHorndeski gravity. The indicated the shows cloud blue The ΛCDM. star,is black model, a with reference The clustering. galaxy in modifications represents which μ-1 function the to corresponds axis vertical the while lensing, weak in modifications encodes which Σ-1 function the to horizontalHorndeski The gravity: corresponds axis LargeFig.1. Scale Structure phenomenology ofviable D ark E nergy ). The exciting prospect is that of that is prospect exciting The ). http:// ------The Euclid Consortium Newsletter - Spring 2019 U Bibliography T tortion of galaxyimages dueto lensing,the pre dis the of and clustering galaxy of map tensive ex the provide will Euclid Since sources. gravitationallightfromeffectthe distant lens of itself inthedynamics of galaxiesand inthe differentlycle from differencelight;this reflects parti matter of trajectory the perturbs Gravity ceived great attention. rehas scales gravitylargesttesting the of at ity possibil WG the forward, pushed Theory be should thinks the that projects key the participants. Among 45 about by attended Fer was Pedro reira, by hosted Oxford, in meeting The initial state oftheUniverse. the on constraints and astronomy)wave tional gravita with instance, (for data external with physics”, tests ofhomogeneityandisotropy, “new synergies and parameters standard cosmological between degeneracies matter, dark and energy dark inflation, alternativeof models cal model: tests of gravity at cosmological scales, physicsmental beyond standardcosmologi the funda exploring to devoted is WG Theory The the firstanalyses ofactualdatafrom Euclid. is, that projects, key the particular in discuss to Phys. al., 119 et P.Creminelli Phys.Rev.Lett. 251304; al., no.25, (2017) et Ezquiaga M. J. L12.; no.2, (2017) 848 Astrophys.J. al., B.P.et 6. Abbott 5. Euclid DefinitionStudy Report. (2016) A14. 594 .Astrophys. collaboration, 4. 3. L. Pogosian et al., Phys.Rev. D81 (2010) 104023. (1974) 363-384. 10 Int.J.Theor.Phys. Horndeski, W. G. 2. 1. T. Clifton etal.,Phys.Rept. 513(2012)1-189. dicted phenomenology to the firstquadrant andlocalstability tests further constraining the pre withwell, very holds positive, or null being (μ-1)(Σ-1) of [10], in formulated conjecture the that noticed be can It [9]. h/Mpc k=0.01 and a=0.9 at computed been have shown results The respectively. areas, erboard pda cently held a meeting in Oxford (April 8-9) (April reOxford in meeting had a held cently group working Theory Euclid he te

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the T heory S cience . ------W 0 L Pgsa ad . ivsr, hsRv D94 Phys.Rev. (2016) no.10,104014. Silvestri, A. and Pogosian L. 10. no.4, (2018) 043519. D97 Phys.Rev. al., et Peirone S. 9. no.6, 063524 (2017) D96 Phys.Rev. al., no.4, et Peirone (2014) S. D90 043513; Phys.Rev. al., et Raveri M. 8. (2013) 214007. 30 Class.Quant.Grav.F.Vernizzi, and F.Piazza 7. Phys.Rev.Lett. 119(2017)no.25,251301. Rev.Lett. 119 (2017) no.25, 251302;T. Baker et al., the TheoryWG’s activity inthe near term. of focus the be will direction this in workmore realized;already part in been has models these vis-a-vis performance Euclid the of Forecasts nomena. phe new predict that models cosmological of aspects severalother and anisotropies, and ties inhomogenei large-scale for evidence tectable de any is there whether testing models, verse about uni early very assumptions fromgravity, predictions testing the on depend hierarchy their possibly and masses neutrino the how ing measur spectrum, powermatter the on impact their at looking by models matter dark testing at aim Oxford in discussed projects key Other but also on the basis of theoretical expectations. fewyears, in part to explainthe cosmic acceleration, last the in proposing been have theorists it can reject or support a host of alternatives that neverthat beforedistances explored,butto also Relativity General confirm can Euclid that only not implies accuracy.unprecedentedThis an to tested be can theories gravitational of dictions orking Luca Amendola, MartinKunz &Matteo Viel Alessandra Silvestri andSimone Peiron G Institute LeidenUniversity Lorentz, roup - - - - - The Euclid Consortium Newsletter - Spring 2019 E S storage and the baseplate on which the integra the which on baseplate the and storage in mirror,now primary the of that example for lel we also completed several flight-model units, paral In campaign. STM the for built being are module payload the and the telescope Toulouse,magnificent in Airbus In performed. be will test the where Cannes in facilities Thales the to The SVM STM is completed and has been shipped cal tests to be carried out in the first half of 2019. with dummy units for the thermal and mechani already assembling what will be flying equipped are we one, flight the actually is structure mary (STM) model (SVM) Module Service loaded when available. In Turin we also have the pleted and the various software versions are up com been have tests many Turin, in Thales at (EM) cal spacecraftall and instrument with made model (electrical Model Avionic progress:the great had we hardware Concerning to Euclid are areal challenge! small margin: we all know that the objectives set with albeit requirements, index growth the and and we can meet both the proved that It Euclid is on consortium. top of what the we promised of scientists many by effort huge a required This requirements. science the meet to Euclid of capability the of assessment the (SPV2) VerificationPerformance2 also was CDR mission the of Part for-final-assembly/ key-milestone-for-euclid-mission-now-ready- readcan here: mission. The mission CDR was a success aas you THE major review of the entire design phase of a have been directly involved. The MCDR is indeed you of many where CDR Mission the finally and subsystemCDR’sand were completed;units the Review) Design (Critical CDR spacecraft the then was there year; the of part early the in VIS place took also out the close CDR delta phase; implementation the for ready and mature judged were that segments ground Science and Operational both comprising view, ful completed: the Ground Segment design re year, which have in the mean time been success last on going reviewsmany the We about wrote uclid number of activities occurred in the Project. the in occurred activities of number huge Newsletter,a last the in report the ince

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and the new the and FlightModel ------The Euclid Consortium Newsletter - Spring 2019 Context SGS S S SC4/5/6 is even more ambitious with the pro the with ambitious more even is SC4/5/6 sky. of portion small a on PFs six by SDCs ous vari and components system available the of SC3 already demonstratedsuccessful usage the of which inspires respect! name challenge, sole a is there practice, In SPE. with just SC6 or PHZ run with SC5 to SHE, with feasible SC4 be would it so together, data exchange not do PFs new three the cause be challenges three Conceptually,are there1). figure (see afterward loop the in integrated be to remain will LE3 only respectively: SPE, and cur PHZ SHE, welcome – SC4/5/6 – The challenges rent SC3. joined MER and EXT then, SIR; and NIR VIS, namely SC2, joined PFs additional While SIM was the only PF in 2015 for SC1, three the primary. testing theprocessfrom in eachSDCstarting and components system new bringing rithms, algo the improving area, sky larger a cessing previousbychallenge integrating PFs,new pro turity andcompleteness increased during the year,ma overalla SGS the challenge and one is (PFs) Functions Processing (for anexplanatory listofacronyms seetheend) risk detailed a SPC the to present and areas cal ESA to take action requestedwith respect to the but most criti options these adopt to not SPC the convinced performance mission the on es schedule most dramaticThe consequenc VIS. element, critical then the descoping by the delays reduce to objective the with mainly ined, exam were options Several mission. the ing” “descop by cost the recover to possibilities at (SPC) Committee For this reason theESA overrun.projectcost delayssubstantial and a is One of the consequences of the many challenges reason notto delay theproject any further. of A62, thisis therefore anotherextremely good environment dynamic the with compatible be However,not development. might under Euclid currently 62 Ariane the on fly to feasibility the Wefound. studyhaveto requestedArianespace be haveto will alternative launcher an that risk tests of the scientific pipelines that form the form that pipelines scientific the of tests cientific Challenges (SCs) cientific requested the project to look to project the requested

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------SC4/5/6 description ject. ject. pro wonderful our of realisation the towards forwardstep fundamental another 2020: in out PLM FM integration and test that will be carried will be delivered to enable the completion of the VIS and NISP both year the of end the By level. bly,AVMSTMand testat and FM, STMand both assem hardware of year the manufactur be will 2019 units ing, with together levels all at completion design of year the was year last As achieve major ment for theproject. a was This granted. been has is confirmed unchanged and an increase budget mission Euclid that confirmed SPC the yearand control. under all now are risks project the that show to assessment he fed o ve ae iuae ad pro and simulated cessed: are view of fields Three status. current its into insightgive some and challenge the quickly describe us Let etc. mechanism tion orchestra an introducing precision, more with PFs, more by sky, more times eight of cessing Figure 1:SC4/5/6Pipeline This was done early this early done was This Giuseppe Racca ------The Euclid Consortium Newsletter - Spring 2019 Status • • • • • • • C// itgain et. l te et i the following families have passed: in tests the All tests. integration tested SC4/5/6 been have and areready almost formost ofthe starting components system The in avery goodshapeto startrunningthePFs! havingdelayedarenowproduction,weand the –, surveysexternal the from data of variety the with coping validatingthem, and implementing ing anagreement onthefeatures to simulate, Having overcome initial difficulties – like reach with representative Euclid dataprocessing. cope to system the of ability the demonstrate (TK2) #2 Keypoint Technical the at presented be will tests those of Results lines onalloftheSDCs. pipe PF the of all execute we where of SC4/5/6 tests main the are finally which tests, and integration tests, PF participate), SDCs (nine tests SDC COORS), EAS, (IAL, tests systemcomponents categories: several in grouped be can which specified, been have tests of Hundreds mainly consistsof: it infrastructures, the from Aside complete. to The system PFs have to integrate to is now close . background and images deeper much tortion, dis spectral PSF,and variable spatial including Numerous new scientific features are simulated, processed by VIS,NIR,SIR andEXT. than bigger times SC3’s. In addition, eight a lot of calibration images are area an cover They EAS spatialqueries; which thepipelinesare submitted: COORS. to component orchestration aforementioned The others, PFs exchange theirdata; The Infrastructure Abstraction Layer (IAL) the as known frameworkexecution distributed A tools developers like somuch); (including Toolsother and CernVM-FS CODEEN, Common Elements, EDEN, so-called the upon developmentA environment frameworkand built Figure 2). One large fieldmadeof40observations (see low stellar density; pointings) each:onewithhigh andonewith Two smallfieldsmadeof7observations (28 uld rhv Sse (EAS) System Archive Euclid wee e shall we where , hr, among where, ; - - - • • • • • • first time, a dedicated test pipeline has been de the properly.Forwork and updated been have online andoperational,the system components are writing) of day the of (as one but SDCs All data have beenprocessed anddelivered: rithms for optimal performances. The following tegrationthe algo tune of theirpipelines and in the finalize to data input test to access have PFsnowthe of all meantime, the In production. the is up speeding and for achievement point major a critical now a be to used which SC3, for case the was as one of instead SDCs three over distributed now is SIM of production The days. few a in expected is field wide small first the of delivery final the and closed, are lations simu the in detected iterations. issues critical countless Today, all and PFs the from backs feed fruitful of plethora a to led which images of thousands delivered has SIM side, PF the On the start SC4/5/6 test usingthescientificcode. will we when failure integration of risk the mitigate to way good a is It pipelines. highlyconfigurableresource PF tomimic needs pur and code, scientific with this dependencies no pose: for exclusively developed been has pipeline This tests. integration PF the to prior veloped to validate and stress the infrastructure iue : ag Wd Fed (hns o h MER team for this plot) the to (Thanks 1 Field Wide Large 2: Figure COORS backend. EAS/IAL interfaces; NIR, VIS, EXT (DESandKiDS), SIM (VIS,NIP, NIS,DES,KiDS,LSST), ------The Euclid Consortium Newsletter - Spring 2019 Acronyms What’s next? • • • • will enter thegame in2020to prepare SC8. rounds,readytoget and towelcome which LE3, worka abandon to bugs, remaining fix to nity opportu the be sure for sky.will wider It much a and components system updated PFs, mized opti and refactored with steroids, on SC4/5/6 an as defined is SC7, sequel, The success! rable memo a be soon will SC4/5/6 doubt, no With room to science. complexitytotalleavingchallenge the and more science fromcouple integration,thus reducing shortcutsSuch database. wouldcial allowto de offi the in data the ingest to square-degrees,or Neither is itnecessary to process a hundred framework. execution SGS the use to required way no in is it science, on progress to Indeed, using allthebellsandwhistles oftheSGS. necessarily without yet – year every of instead months two every e.g., -- pace faster a at ered deliv and produced be would data end, Tothis while alleviating thefinalintegration rush. proposed to work with more frequent iterations, been has quality,it and science of will welcome and inevitable this with cope To demanding… more and more are scientists fast, growing are inputs soaring, is sophistication PFs complex: highly becoming inevitably but slowly are SCs downside, the On SC4/5/6. to thanks TK2 be for will more lot a and SC3, through validated already were requirements and features Many of May. beginning the at EXT and NIR VIS, by field wide Weprocessingsmall tothe first start the plan of end to going with SHE,PHZandSPEinJune. is and ago time short a NIR and VIS with started process This tests. integration (CCB) a to submitted are PFs started: has process review and tagging A SIR. MER (VIS,NIP, NIS,DES,KiDS), rcs fnto cek, nak ad decompresses and unpacks checks, function process LE1 SHE Pipeline. Processing Science SC4/5/6 PFs are: SIM, VIS, NIR, EuclidEXT, MER, SIR, SPE, PHZ, complete the of Function) (Processing PF : Starting from: Starting coming from data thesatellite this hc gvs h gen ih fr further for light green the gives which Configuration Control Board Control Configuration :

ai sfwr component software basic ------• • • • • • • • • • • • • • • Antoine Basset&Jérémie Ansart onbehalf ofthe PHZ vey which willbeused for SC456 Telescope)Survey Synoptic (Large LSST DES the Euclid science. of the external data that will be needed to proceed with EXT mation to provide catalogofsources MER the slitlessspectroscopic frames in spectra the extracts and images spectral calibrated fully produce to 2 Level to telemetry edited from data SIR calibrated images fully produce to 2 Level to telemetry edited from data NIR images, aswell assource lists calibrated fully produce to 2 level to telemetry edited VIS data (for EXT, VIS,NISandNIP) SIM ence data. sci of analysis look quick a makes and telemetry, the of theSGSProduction Pipeline executionthe manage interfaceand user todefine used System) ORchestration (COmmon COORS service CernVMFS (CernVM FileSystem) framework tailored to Euclid needs Elements Euclid software of deployment and integration continuous the lowing al engine, Jenkins on relying infra, based web central Environment) Development (Collaborative CODEEN plied to develop Euclid software aging, ...) and corresponding versions that should be ap pack (compilers, tools ...), guide, SoftwareEngineering standards, (coding rules ...), libs, (O/S, standards mon Environment) Development (Euclid EDEN from theLevel 2spectra SPE on thevisibleimagingdata SHE from themulti-wavelength imagingdata : PF in charge of processing the visible images from images visible processingthe of charge in PF : : PF in charge of processing Near-Infrared imaging Near-Infrared processing of charge in PF : : PF in charge of processing Near-Infrared imaging Near-Infrared processing of charge in PF : : PF in charge of the production of all the simulated the all of production the of charge in PF : : PF in charge of extracting spectroscopic spectroscopic extracting of charge in PF : : PF in charge of entering in the Euclid Archive all Archive Euclid the in entering of charge in PF : (Dark Energy Survey), Energy (Dark : PF in charge of computing shape measurements shape computing of charge in PF : : PF in charge of computing photometric redshifts photometric computing of charge in PF : : PF in charge of the merging of all the Level 2 infor dvlpet cmiain n execution and compilation development, : KIDS (Kilo-Degree Survey) (Kilo-Degree KIDS : software distribution SC4/5/6 team : externalsur web-based : Te com The : : a ------, The Euclid Consortium Newsletter - Spring 2019 (CAS-GM20) Moment basedmorphologicalindicators T on non-parametric measurementslight ofthe based are indicators These 2004). al. et (Lotz M20 and Gini ones, additional two by mented (Conselice et al. 2000), which are then comple Asymmetry andSmoothness(CAS) parameters to compute are the so-called Concentration- mor galaxy fastest also and simplest of phology.the Perhaps indicators multiple with up come has community the years, last the Over included inthemainEuclid catalogs. sure that morphological measurements will be (OU-MER) data MERged Unit ganisation past few years in close connection with the the workedduring has group Our mission. the of deliverable main a be will morphology axy meas ured onEuclid galaxiesto guaranteegal that be will that indicators morphological of variety a providing and testing developing, of charge in is Package Working morphology The undeniable. is morphology galaxy for tial poten legacy The fields. HST deep current to respect with area in 1,000 of factor a of crease high resolution imaging. This represents an in of degrees square 15,000 provide will Euclid he of the OU-MER pipeline (Credits: R.Cabanac). part nowparametersareCAS . high at done been havetests Similar types. morphologicaldifferent indicate symbols different The Smoothness. and Asymmetry Concentration, right: to left From al. et selice Con of resultsreference the to compared are ASTERISM of results The galaxies. of sample localreference ExampletestspreformedFigure1: of CASparametersvalidate ASTERISMto of implementationthe in a on G alaxy M orphology W to en ork Or ------P ackage on Euclid simulations (Figure 1) and improved as well as galaxies distant and nearby served last year, we performed systematic tests on ob Overthe pipeline. deblending MER the in used wasit since point already and Python in coded TERISM (Tramacere et al. 2016) as the starting AS use to decided We different. significantly differentperformancethe wastheir codes, not measured slightly different behaviors between we Although EUCL-IAS-TN-8-001). al. et caud parison of three different available codes (Bou purpose, we first performed a systematic com this For pipeline. OU-MER the by detected es these parameters are computed forsourc all that ensure to packagessoftware required the develop to started first we simplicity, their of such as bulge prominence or mergers. Because different morphological featuresimportant in galaxies with well correlate to shown been particular surface brightness profile. They have any assuming without galaxies, in distribution ing theresults. analyz of process the in now is group our and computedSC4/5/6 challenge of the part as been haveparameters CAS The pipeline. main OU-MER the in included now are which tines ASTERISM.in We finally delivered rouof set a accordingly theoriginalCAS implementation ------The Euclid Consortium Newsletter - Spring 2019 Parametric bulge-discdecompositions etd idpnety f h cd ue) In lengths (scale used). parameters bulge particular,the code the of (independently ex as pected good as not are now, of as results, The Sersic models. with described completely are galaxies since should be seen therefore as a best case scenario tests These galaxies. the simulate to used eters param input the with parameters recovered the compare and and codes different the with PSF) noise (including galaxies of distribution Brightness Surface the fit We is straightforward. testing the disk), and (bulge models Sérsic component two using simulated also currently Since the galaxies included in thesimulationsare releases. challenges data SC4/5/6 and OU-SIMSC3 official the on then and TN-8-001), EUCL-IAS- al. et sim (Boucaud internal, simulations on plistic first codes, different three test to decided we parameters, CAS the for as detectedFollowinggalaxies.approach similar a forcatalogs the MER fractiona least at of the in model providebest-fit to the is goal Our gle). an position and axis-ratio index, Sérsic length, (scale parameters 4 typically with galaxies of description parametric a provide approaches metric models, based on Sérsic functions. These para with surface galaxies of distributions the brightness of fitting galaxy through measuring is morphology of way standard Another denotes the effective radius as measured using GALFIT. The color bar indicates the reference galaxy magnitude from the TRUE Universe catalogreference (Credits: F. the Buitrago, U. Kuchner).indicates bar color GALFIT.The using measured as radius effective the denotes y-axis The fraction. bulge its to scale according objects thethese splitting shows spheroids, and x-axis disks both The for lengths simulations. the from sizes retrieve to ability our showing Plots 2 Figure - - - - - collaboration with OU-MER, a systematic test in of undertake, to decided we dependent, very code are aspects these all Since intervention. human or restrictions no with blindly, applied when models component two of stability the is problem Another example. for algorithm, tion different codes; depending on theminimiza between significantly changes This Euclid. to be comes prohibitively large in order to be codes applied some for which time, computing is one first The problems. two least at present es approach parametric that concluded we tests, of battery this conducting By results. previous show a significant improvement with respect to to seem not do tests preliminary however,the of testingrelease,challenge data onthelast process the in now are We simulations. of ity qual the validating and checking for work our of importance the highlights also This release. SC4/5/6 the in corrected been now have and the SC3 data which were transmitted to OU-SIM in rendered are galaxies way the in problems potential of series a identified We 2). (Figure properlyrecovered not are indices) Sérsic and h calne s xetd o e anhd in launched re first havethe to order in 2019 of Spring be the to expected is challenge The participate. to asked are codes different the of owners the “challenge”,where a of form the in (including machine learning based approaches) literaturethe availablein codes of majority the - - - - - The Euclid Consortium Newsletter - Spring 2019 phologies basedmor “Detailed” machinelearning eet uvy wt a ml r-riig stage. re-training small a with surveys ferent dif across recycled be can models that shown known morphologies). In recent works, we have / available (with samples large sufficiently on trained be to need nevertheless, networks, The tial 2.1.). referenEDEN forthcoming the frameworkinto tegrate a Machine Learning & Deep Learning in to Consortium the in created recently been has group working alternative(a interesting an deeplearningofferslearning and,inparticular Machine images. the galaxies of number given enormous Euclid, for feasible not is approach science citizen traditional However,a spective. classifica morphological tions arefrom alsoimportant outreach an per visual and science Citizen methods. described previously the with obtained be cannot which features) tidal arms, cal components (e.g. the presence of bars, spiral morphologi galaxy of classification detailed a provides approach This samples. large for gies morpholo visual providedhave science citizen on based Zoo, Galaxy the like projects past, the In galaxies. Euclid of detailed, morphologies of visual-like determination the is heav involved is ily group our which in aspect third The pipeline by theendof2019,beginning2020. tation for model fitting morphology in the Euclid implemen an on decide to us allow will proach ap this that expect We 2019. Fall the in sults ------deblending, incommonefforts withOU-MER. galaxy as such tasks key other for adapted ing be also are morphology for developed niques being tech learning deep also the Additionally, explored. are techniques learning machine unsupervised purely Alterna on based approaches tive galaxies. realistic simulate to 2016) al. et Ravanbakhsh (e.g. Models Generative on cur rently done. We as are exploring approaches based models Sérsic of instead galaxies istic real including simulations however, requires, algorithms these Calibrating effort. minimize human the that algorithms developing as well as inspection, visual for targets of selection the optimize that techniques learning active plying machine learning. This effort is focussing on ap for labels generating to mean a as science zen citi of efficiency the optimize to techniques ing develop are we context, this In Euclid. for alog one could obtain an accurate morphological cat selectedspection ona of Euclid sample galaxies on in visual surveysexistingadditional some with trained models combining by Potentially, f neetd n onn pes cnat Marc contact please Huertas-Company (marc.huertas atobspm.fr) joining in interested If page/55465078/WP4 URL: ing follow the in found be can meetings the of utes min the and telecon monthly a has group Our Marc Huertas-Company &ChrisConselice http://euclidgawg.pbworks.com/w/ ------he uclid onsortium ewsletter pring

T E C N - S 2019T S A uue t s niae t alw n interactive Cat cuts/dynamics. an image the allow of manipulation to envisaged is it future Survey) sive with done currently is data the of visualization The sions. ver next the in integrated be also shall service derivedproducts. intuitiveand simple A plotting spectracatalogues, of the tation other LE3 and (GUI) Interface User Graphical a with maps 2) (level processed fully to access fast and easy an is SAS the of goal primary The Storage System (DPS/DSS) the bystored and pipelines the by produced productslegacy,intermediate science all not but SASThe valuablemost the host will products for archives ( edge, expertise and software libraries from other knowl existing the advantagearchivesof taking of generation technology latest the follows SAS the architectureof and design archives.The tific scien ESA the of maintenance and velopment Centre (ESDC) the by developed is SAS The and itslong-term legacy. community astronomical wide the for ploitation ex scientific the enable to is SAS the of goal ry prima termpreservationThe data. Euclid the of he A lease. These tasks are of crucial importance for importance crucial of are tasks These lease. processing,data handling, data rethe data and telemetry calibrations), and tuning (instrument ble for survey operations, instrument operations erationsGround Segment consistingof theMis The Science Ground Segment works with the Op veloped. zational unit (OUs) (SOC) Centre Operations ence the many entities: nine of consists Segment Ground Science Euclid The the scientificsuccessofEuclid. cience E pr o is adt EA s eeoig a developing (SAS) systemarchive is scientific ESA mandate its of part s AladinLite the Science Ground Segment. It is responsi is It Segment. Ground Science the element ofthe Euclidn important mission is ntuet prto Ta (IOT) Team Operation Instrument uclid G technology in the EuclidSky. In the EuclidSky.In the in technology , , which is responsible for the de the for responsible is which , S round ESASky and Science Ground(SGS) Segment cience where the algorithms are de HiPS Science Data Centres (SDCs) …) S (Hierarchical Progres(Hierarchical . egment A Data Processing and Processing Data ESAC ScienceData rchive , and the exploiand , , andten for thelong- D S , the esign organi ystem Sci ------

------, R alogues or the resultof their n o iae u-us ue-eie suc ex source user-defined cut-outs, image on ing process light instance for archive, Euclid the to close analysis data enable to notebooks Jupyter (SEPP) form A cessing ofpetabytes ofdata. Spark SAS with a GP database behind. However alreadythe can in DR3 queried KiDS be and ship the with amount data and allows ADQL queries. The Flag up scaling allows it as catalogues for Plum of system database large catalogues, up to the 10 billions objects. for year last the over performed wasexploration technology a erated, gen be will that data of amount huge the Given also planned inthefuture. is service cut-out image An EuclidSky. on Query Language(ADQL) and give usany feedback andsuggestions. it test to encouraged are members Consortium sas-dev/ at available is SAS The lines withdifferent parameter setting. pipe some re-running possibly even or traction eview Due to the number of actors involved, the the endof detaileddesignphase (CDR) Review Design Critical to a high level “design review”, as part of the ESA subject was Segment Ground Science Euclid The is correctly exchanged between theparties. fully defined to ensure that the right information care be centres the between interfaces the that requires Segment Ground Science the of ration highlyconfigu distributedThe USA. Europeand in institutes different at located are centres The work. net station ground and Centre Operation sion cetfc xliain n Peevto Plat Preservation and Exploitation Scientific (GP) is also considered to be used for the pro the for used be to considered also is Sara Nieto ,Euclid archive system engineer Bruno Altieri, Euclid ESA archive scientist with an LDAP credential access. Euclid access. credential LDAP an with has been identified as veryas promisingidentified been has will soon be available at ESAC with ESAC at available be soon will https://eas.esac.esa.int/ queries can be overlaidbe can queries yl ta marks that cycle Astronomy Data Apache Green Ground ------The Euclid Consortium Newsletter - Spring 2019 The review panels identified over 800 issues that ered. consid properly were systems the of elements managerial and technical, scientific, all that sure The review consisted of four review panels to en 2). Phase for 33 and 1 Phase for documents (44 which systems;package document a in detail in their described were of status and approach development and design the presented parties Novemberdifferentof the Atmeeting, 2017. this 7 the on ESOC wasat meeting held nary The Science Ground Segment Design Review ple aspects were underscrutiny. management system SGS overall and functions processing EC-SGS the 2 Phase in while re viewed, been has operations instrument as well as EC-SGSand SOC infrastructure GroundSegment, Operationsthe 1) (Phase phase first a In phases. Segment Design Review (GSDR) since the previous review.previousthe sharedthe Board since The improvement performance processing LE3 tial During the review, the SGS presented the substan for improvement ofthe present development. port contained many detailedrecommendations eralstate ofthescience ground there segment, gen the about observations important Besides 2018. January in report its issued BoardReview The EC-SGS. or SOC MOC, the on actions to led took place in two th and 8 and th ------

in o eie f em o Rfrne between Reference the of Terms of define to tion recommenda the endorsed Board Review The ment was manageable with the actions foreseen. Panel’s view that the necessary further improve to take placeinOctober 2019. scheduled 2, KeypointTechnical is which point, check next the for start soon will Preparations and should take pride in what has been achieved. progress excellent demonstrate to able was SGS entirethe hardand milestonewas a SGS-DR The take placeonNovember 2018. men, presented to theEuclid Mission CDR that Chair Panel the of endorsement after and 2018, April of end at Project the from report close-out a in summarized then was recommendations ed Implementation of the agreed actions and adopt therefore the review was successfully completed. ture and adequate at this stage of the Project and Euclid Ground Segment the Design status is sufficiently ma that considered Board Review The lines andensure asmoothhand-over. time the along responsibility identify clearly to OperationTeam Instrument John HoarandAndrea Zacchei onbehalf ofEuclid Instrument Development TeamDevelopment Instrument (IOT) with the scope the with (IDT) and the and ------The Euclid Consortium Newsletter - Spring 2019 C Euclid Consortium. project the NISP and ESA by appreciated very French and manager as known Ma Thierry well by ciaszek replaced is he and CNES the (French leaves manager project CNES Euclid Agency) Space former Clédassou Rodolphe them. tivities of the Scientific challenges ac and we thank the involvement strong a with coordinate CNES from Basset Antoine and Ansart Jérémie have theenergy withSantito seethelight. you that know we but do to work of lot a youhave Patrick you, thank Anne as co-lead. OU-SIM over taken has Hudelot Patrick mitments, com pressing other to due co-lead OU-SIM as decided Anne Ealet to resign from her position pleasure working withyou. Herv Marc. miss will clid Eu Marc, miss will SGS The had. we discussion the all in approach always-kindly the for and did he that work the all for Marc thank us Let Herv assisting continuing 2019 Consortium meeting in Helsinki, Marc will the mantefromstarting asSGSScientist the no Herv ensure lost is to knowledge Marc with works and scientist Herv SPICA. to time his dedicate to Scientist SGS of role the from resign to decided Sauvage Marc changes intheScienceGround Segment: notable of number a be will Therehaveor been him allthebest…atGoogle ! wish We appreciated. much were workshops developersEuclid the during softwaretutorials different His ++. sextractor PHZ, tools, model ment of different processing software: SIM, data develop the to contributed has he developers; software Euclid skilled and active most the of one been has Apostolakos Nikolaos (Geneva) For several years in LAM (Marseille) and in ISDC omings é usl a nmntd s h nw SGS new the as nominated was Aussel

and G oings é é il fiily ae on take officially will é good luck it will be a be will it luck good for the rest of 2019. of rest the for

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the SGS - - - - - For the last 3 years, Alain Schmitt (OU-SPE) was OU-SIM. for requests simulation and issues of dination coor in helped and Board Control Change SIM the chaired and Created (OU-SIM): Hong-Nga nated thevalidation activity coordi underOU-SIM. and challenges scientific SGS first the tense productionin SDC-ESforof simulations in the Orchestrated (OU-SIM): Tonello Nadia lations andtheSGSScientificChallenges. simu havekeyEXT LSST)whichfor been KiDS, (DECam, surveys. external from exposures ing imag ground-based produce to pipeline lation pixelsimu FahedRemiDeveloped(OU-SIM)a : Near-Earth Object Coordination Centre. the for ESRIN at ESA for working now is He simulations. object system solar and System Look Scientist. Quick the for responsible Operations was He Instrument as 2019 2014 to from SOC the in worked Conversi Luca hns o hs wo ev ad ecm to welcome and those coming. leave who those to Thanks kept avery well maintainedcluster. and demands all meeting in swift very always work packages. We will miss him a lot as he was wasControlresponsibleMonitoringand for the and pipelines EXT the of integration SDC-DE, the aided of sysadmin the was He year. last of end the at project the left Piemonte Antonello past years. formance Report andMCDRstudies through the tively involved in the SPV and NISP Science Per ac been also has He validation. data and egies critical improvements to methods, coding strat several originated and measurements redshift on developments PF-SPE the in involved fully Andrea Zacchei ------The Euclid Consortium Newsletter - Spring 2019 C EC B ont servations Lead servations Lead port EC Diversity CommitteeLead Lead Observations Complementary Science Performance Verification Lead Ob and Ancillary EC Complementary SWG LegacyCoordinators Science Coordinators EC Editorial Board co-Chair EC Editorial Board Chair COMS Responsible NISP-S Instrument Scientist NISP-P Instrument Scientist NISP Project Manager VIS Instrument Scientist VIS Instrument Lead VIS Project Manager EC SGSScientist EC SGSDeputy Project Manager EC SGSProject Manager Calibration WGLead Mission System Engineer Mission Survey Scientist andCoordinationECL Advisory Sup ESA Project Manager ESA Project Scientist Euclid Lead-Deputy Consortium Euclid Lead Consortium act oard

Francisco Castander António daSilva Huub Röttgering Andrea Cimatti Ralf Bender Yannick Mellier Hannu Kurki-Suonio Werner Zeilinger Ray Carlberg Mark Cropper Romain Teyssier list M embers raymond.carlberg msc romain.teyssier fjc asilva rottgering a.cimatti bender mellier hannu.kurki-suonio werner.zeilinger - - ieec.uab.es mssl.ucl.ac.uk astro.up.pt Michel Berthe Giuseppe Racca René Laureijs Francis Bernardeau Yannick Mellier Bianca Garilli Koen Kuijken Hervé Aussel Konrad Kuijken Jochen Weller Jarle Brinchmann Chris Conselice Will Percival Luigi Guzzo Tom Kitching Henk Hoekstra John Peacock Peter Schneider Eugenie Girin Anne Ealet Knud Jahnke MaciaszekThierry Ruymán Azzolini Mark Cropper Sabrina Pottinger Hervé Aussel Christophe Dabin Andrea Zacchei Mischa Schirmerr Jerome Amiaux Roberto Scaramella usm.lmu.de iap.fr strw.leidenuniv.nl unibo.it univie.ac.at utoronto.ca uzh.ch helsinki.fi Bob Nichol Jason Rhodes Rafael Rebolo Lopez Lucia Popa Per Lilje Roberto Scaramella Hans-Walter Rix Olivier LeFèvre Allan Hornstrup Sven De Rijcke jap peter girin ealet jahnke thierry.maciaszek r.azzollini msc sjp herve.aussel Christophe.Dabin zacchei schirmer jerome.amiaux kosmobob michel.berthe Giuseppe.Racca rlaureij francis.bernardeau mellier bianca.garilli kuijken herve.aussel kuijken jochen.weller jarle christopher.conselice will.percival luigi.guzzo t.kitching hoekstra mssl.ucl.ac.uk roe.ac.uk mssl.ucl.ac.uk strw.leidenuniv.nl cppm.in2p3.fr iap.fr astro.uni-bonn.de mpia.de iap.fr rssd.esa.int oats.inaf.it strw.leidenuniv.nl strw.leidenuniv.nl strw.leidenuniv.nl mpia.de mssl.ucl.ac.uk ucl.ac.uk oa-roma.inaf.it brera.inaf.it cea.fr cea.fr usm.uni-muenchen.de port.ac.uk inaf.it cea.fr cea.fr bob.nichol jason.d.rhodes rrl lpopa per.lilje kosmobob rix Olivier.LeFevre allan sven.derijcke esa.int lam.fr cnes.fr iap.fr nottingham.ac.uk iac.es mpia.de space.dtu.dk spacescience.ro astro.uio.no oa-roma.inaf.it port.ac.uk jpl..gov UGent.be lam.fr The Euclid Consortium Newsletter - Spring 2019 T T Bianca Poggianti Local Universe SWG Annette Ferguson Eline Tolstoy Milky Way andResolved Stellar Populations SWG Jarle Brinchmann Andrea Cimatti Galaxy &AGN evolution SWG Yun Wang Will Percival Luigi Guzzo Galaxy clusteringSWG Martin Kilbinger(dpty) Tom Kitching Henk Hoekstra Weak lensingSWG he he Rychard Bouwens Gianluca Polenta OU-NIR -Near-IR imaging Kevin Benson Catherine Grenet Henry McCracken OU-VIS - Visual imaging Joe Mohr Gijs Verdoes-Kleijn OU-EXT -Data externaltoEuclid Christian Surace Olivier LeFèvre OU-SPE -Spectroscopic measurements Yannick Copin Marco Scodeggio OU-SIR -Near-IR spectroscopy S O cience rganisa W tional orking wang will.percival luigi.guzzo martin.kilbinger t.kitching hoekstra bianca.poggianti ferguson etolstoy jarle delbaz a.cimatti kmb grenet hjmcc jmohr verdoes christian.surace Olivier.LeFevre y.copin marcos bouwens gianluca.polenta U G nits strw.leidenuniv.nl mssl.ucl.ac.uk ipac.caltech.edu roups iap.fr usm.lmu.de cea.fr iap.fr lambrate.inaf.it ipnl.in2p3.fr astro.rug.nl astro.rug.nl strw.leidenuniv.nl roe.ac.uk unibo.it strw.leidenuniv.nl ucl.ac.uk brera.inaf.it port.ac.uk lam.fr lam.fr cea.fr @asdc.asi.it oapd.inaf.it Enrico Cappellaro (dpty) Isobel Hook Charling Tao SNe and Transients SWG Eamonn Kerins (dpty) Maria Zapatero-Osorio Jean-Philippe Beaulieu Extrasolar planetsSWG Nabila Aghanim Carlo Baccigalupi CMB Cross-correlations SWG Jim Bartlett (dpty) Lauro Moscardini Jochen Weller Clusters ofgalaxiesSWG Chris Conselice Stephane Paltani OU-PHZ -Photometric redshifts Tim Schrabback Frédéric Courbin Andy Taylor OU-SHE -Shear measurements Benjamin Joachimi Enzo Branchini Jean-Luc Starck OU-LE3 -Level 3data Martin Kuemmel Hervé Dole Marco Castellano OU-MER -Merging ofexternalandEuclid data Patrick Hudelot Santiago Serrano OU-SIM -Simulations ofEuclid data Francesco Castander stephane.paltani schrabba frederic.courbin ant b.joachimi branchini jstarck mkuemmel Herve.Dole marco.castellano hudelot serrano fjc enrico.cappellaro i.hook tao eamonn.kerins mosorio beaulieu nabila.aghanim bacci bartlett lauro.moscardini jochen.weller christopher.conselice ieec.uab.es roe.ac.uk cppm.in2p3.fr sissa.it cea.fr lancaster.ac.uk ieec.uab.es iap.fr apc.univ-paris7.fr iac.es astro.uni-bonn.de iap.fr fis.uniroma3.it ias.u-psud.fr ucl.ac.uk usm.lmu.de usm.uni-muenchen.de manchester.ac.uk oa-roma.inaf.it ias.u-psud.fr epfl.ch unige.ch nottingham.ac.uk unibo.it oapd.inaf.it The Euclid Consortium Newsletter - Spring 2019 T T T Massimo Meneghetti Jean-Paul Kneib Strong lensingSWG Sune Toft Jean-Gabriel Cuby Primeval Universe SWG Romain Teyssier Pablo Fosalba Cosmological Simulations SWG Rees Williams SDC Netherlands Maurice Poncet SDC Marco Frailis SDC Italy Keith Noddle SDC United Kingdom Pierre Dubath SDC Switzerland he he he Vincenzo Cardone Ariel Sanchez Valeria Pettorino Martin Crocce Carlo Giocoli Alkistis Pourtsidou S I I nter nter cience -SWG T -SWG T D a t a C askforce o.r.williams Maurice.Poncet frailis [email protected] Pierre.Dubath askforce cardone arielsan valeria.pettorino crocce carlo.giocoli alkistis.pourtsidou massimo.meneghetti jean-paul.kneib sune jean-gabriel.cuby romain.teyssier fosalba entres oats.inaf.it dark-cosmology.dk ieec.uab.es ieec.uab.es mpe.mpg.de oa-roma.inaf.it rug.nl -L -N unibo.it unige.ch cnes.fr gmail.com epfl.ch cea.fr ikelihood lam.fr port.ac.uk on oabo.inaf.it -L inear Charling Tao Benoit Carry Bruno Altieri Solar System Object SWG Matteo(dpty) Viel Martin Kunz Luca Amendola SWGCosmological Theory Raphael Gavazzi (dpty) SDC Finland Maximilian Fabricius SDC Germany Christian Neissner SDC Spain Harry TeplitzHarry SDC US Hannu Kurki-Suonio mxhf neissner hit hannu.kurki-suonio tao benoit.carry bruno.altieri viel Martin.Kunz l.amendola gavazzi ipac.caltech.edu cppm.in2p3.fr oats.inaf.it mpe.mpg.de pic.es iap.fr thphys.uni-heidelberg.de oca.eu sciops.esa.int unige.ch helsinki.fi