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Rubin, DESC and LSST-France news

Responsable scientifique : Johan Bregeon (LPSC)

Responsable technique : Fabio Hernandez (CC-IN2P3)

27/11/2024

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From LSST to Rubin: a 25 years story

Budget

Construction = 570 M$
Operations ~ 70 M$/an

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2024: The observatory construction is done!

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Mirror M1M3 on the telescope in october

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ComCam on Telescope Mount Assembly…

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ComCam on-sky since October 24th, 2024

Adaptive Optics System: very good performances (resolution below 1”)
Data Acquisition and Management is doing pretty well
Lots of work ahead before beginning operations: wind shield, thermal control, …

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TMA SITCOM Performance Analysis

D. Boutigny and A. Jeremie from LAPP

Mirror M1M3 + cell
Top End Assembly (TEA)

Miroir M2 + cell, Caméra + M2 Hexapods, Rotator

Telescope Mount Assembly (TMA)
Move a 350 t 8.4 m mirror at 10 deg/s, while keeping the optics aligned!

Forces maximales

Disjonction

Measuring earthquakes…

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Camera Filter Exchange System (including Loader)

Camera on summit mid-may 2024 : full team on summit over >1 month to restart the camera.
Camera Cold in August 2024 and starting EOTest in September.

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Camera Focal Plane Reverification - Run 7

Integration and electro-optical tests from September to end of November 2024

Calibrations, Photon-transfer curves, bias and gains stability, persistence, brighter-fatter
Performances as good as at SLAC: optimisation of the global configuration for the readout

Data at USDF, no replication at CC-IN2P3 yet, but working on it
Contribution to shifts on summit, to data analysis and to data processing at USDF

Readout noise

Bias stability

Photon transfer curve

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Collimated Beam Projector

From Tucson to Chile: a shaky trip… that comes to a happy end.

CBP in the Dome ready for testing just now…

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Rubin LSST France on Summit

Construction and commissioning trips to Chile in 2024

Ingénieurs.es à SLAC : 8 personnes, 3 semaines en Février
Ingénieurs.es au Chili : 9 personnes, 2 semaines en Juin
Ingénieur au Chili : 2 semaines en Novembre
P. Antilogus : 3 mois Mai-Juillet + 1 mois Novembre au Chili
D. Boutigny : 3 mois Août - Octobre au Chili
J. Neveu : 1 mois Août au Chili
A. Boucaud : départ pour le Chili mi-Novembre
T. Souverin : 2 semaines en Août,
Y. Faris : 3 semaines en Novembre

~250 k Euros

Thank You!

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Calendar

Septembre - 30 novembre LSSTCam re-vérification

24 octobre - 15 décembre ComCam sur ciel

Janvier - février 2025 Intégration LSSTCam sur le télescope

Mars - mai 2025 Commissioning télescope + LSSTCam

31 mars 2025 Premiers photons

Construction Readiness Review #2 April/May 2025, Chile

19 juin 2025 Premières images LSSTCam sur le ciel

Été 2025 Commissioning sur le ciel

Construction Completeness Readiness Review #3 July/August 2025, Virtual

16 Septembre 2025 Rubin Operations Readiness Review

Novembre 2025 Début des opérations du LSST

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Calendrier des Data Releases

DR2�LSST Y1

DP1�ComCam data

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DESC News

Collaboration meeting in Zurich in July (~15 people from LSST France)
Preparing the spokesperson election next year (October 2025)

Difficulties to find candidates, calendar issues, …
New “Spokesperson Sustainability Committee” to find and help potential candidates
first set of recommandation issued

Setup of the Early Science Task Force
2 new DESC Builders in France this year

Marina Ricci (Jan. 2024), Michel Aguena (Sept. 2024)

Remember to ask to become DESC Full Member if you think you are eligible

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DESC working groups in 2024

C. Doux

C. Combet

P. Gris

C. Juramy

S. Dagoret-Campagne

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DESC : Early Science Task Force

Task force

10 people from the collaboration (including R. Salomon postdoc @ LAPP)

Role

Recommending whether or not to define a set of Key DESC early science papers (or to allow papers and projects to be defined via the usual DESC publication procedure);
Suggesting ways to avoid having the early science analyses detract from development of pipelines for the Y1 analyses (DR2);
Proposing any recommended changes the DESC publication process for early science papers;
Proposing methods to manage potential conflicts, competing papers, consistency of results and methods on Early Science data.
Report to DESC management, actions and release to the collaboration

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DESC responsibilities in 2024

DESC

Strong involvement in working coordination and committees (CC, MC, AC…)
Marina Ricci chair of the Collaboration Council�

Projet Rubin

Sylvie Dagoret-Campagne au Survey Cadence Optimization Committee (SCOC) en 2025
too few positions… working on it

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Rubin LSST France organigram

Ajustments to come

G. Shiffrin-Sutter
end of HSC/SSP, add LS4
New WL/LSS axis
Scientific Coordinator C. Doux → B. Racine
Coordination “On-sky commissioning and early science” (?)
Point of Contact for the Centre Pierre Binétruy

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Rubin/LSST - Euclid synergies

Discussion Rubin/Euclid à la réunion LSST France de printemps au CPPM

présentation premiers résultats Euclid R. Gavazzi
discussion ouverte sur les projets de chacun.e et les synergies possibles�

Workshop Rubin/Euclid DDP en décembre 2024 au CC-IN2P3

organisation jointe Rubin/Euclid France

fortement dirigée par C. Doux

focalisé sur les Derived Data Products (DDP)
partager l’information, favoriser les collaborations
identifier les besoins en organisation et en calcul
préparer des demandes spécifiques le cas échéant (GdR, IN2P3, CNES, ANR…)

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Centre Pierre Binétruy - Berkeley

International Research Laboratory based in Berkeley (R. Pain is the new director)

unique IRL near San Francisco
Simona Mei appointed contact person for Rubin-LSST (Novembre 2024)

Goals

help researchers, postdocs and students to establish and run strong collaborations
in particular for long duration stays for DESC collaborations

Ideas

inform the collaboration (this slide!)
propose financial support on the LSST France budget
…

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Publications and PhDs!

Publications peer-reviewed : 14 (dont 9 avec corresp. author IN2P3)
Publications dans proceedings : 7 (dont 7 avec premier auteur IN2P3)
Présentations conférences scientifiques par chercheur IN2P3 : 35
Soutenances de thèse : 8

Roman Le Montagner, L’Univers transitoire de haute énergie à l’ère des grands relevés optiques du ciel, J. Peloton & N. Leroy, IJCLab, 30/09/2024
Etienne Russeil, Feature engineering and machine learning for 21st century astronomy , E. Ishida & E. Gangler, LPC, 18/10/2024
Biswajit Biswas, Designing Novel Machine Learning Techniques to Address the Volume and Complexity of the Rubin LSST Data: Separation of Blended Galaxies and Transients Classification in Alert Streams, C. Roucelle & E Aubourg, APC, 26/09/2024
Justine Zeghal, Neural compression and neural density estimation for cosmological inference, A Boucaud, F Lanusse, E Aubourg, APC, 30/09/2024
Enya Van den Abeele, Cosmologie de précision avec LSST : Développement d'un estimateur non biaisé du cisaillement gravitationnel mesuré sur des galaxies, P. Astier, LPNHE, 12/09/2024
Thierry Souverin, StarDICE : Calibration au pour mil d'une nouvelle génération de télescopes pour la mesure de l'énergie noire, P. Antilogus, LPNHE, ?
Kirill Grishin : "Les premières époques de la formation des structures", S. Mei, APC, 12/09/2024
Kélian Sommer : “Photométrie de haute précision pour les grands relevés cosmologiques ZTF et LSST : caractérisation des transmissions instrumentales et atmosphériques.”, E. Nuss, B. Plez, LUPM, 10/2024