Quasar Bazaar Hackweek

Europe/Rome
Room 205 (IFPU)

Room 205

IFPU

Institute for Fundamental Physics of the Universe (IFPU) Via Beirut, 2, 34151 Trieste TS
Description

This workshop aims to bring together astrophysicists, cosmologists, and data scientists to explore new uses and analyses of quasar data. We will focus on three main topics: quasars as standard candles, as tracers of large-scale structure and cosmological probes, and as variable objects, with particular interest in combining methods and perspectives across these areas. Recent (and future) surveys are providing rich datasets to work with: a catalog of 1.3 million quasar candidates from Quaia (Gaia DR3) up to z~4, spectra at different resolutions (e.g. Gaia and SDSS), multi-wavelength observations (e.g. DESI), and time-series (e.g. neoWISE). These diverse data types open opportunities for projects that connect different aspects of quasar science.

This event is designed to facilitate collaborative work and is organized as a mix of workshop, unconference, and hackweek, with the goal of brainstorming ideas, sharing expertise, and developing projects together.
 

🌌 It's a quackweek! 🦆

 

Organizers:

  • Gabriella Contardo (University of Nova Gorica, SISSA)
  • Serafina Di Gioia (ICTP)
  • Konstantin Karchev (Universitat de Barcelona)
  • Kate Storey-Fisher (Stanford)
  • Roberto Trotta (SISSA)
    • -: Welcome & Introductions of everyone
    • QSO 101: Intro to QSO by Manuela Bischetti

      QSO for beginners -- Manuela Bischetti TBC
      + Questions

    • Lunch
    • QSO as standard candles: Elisabetta Lusso

      Elisabetta Lusso + Questions/Discussion

    • QSO as variable objects: D. Ilic & A. Kovacevic; J. Necker; D. Huppenkothen; D.W. Hogg
      • 1
        Intro to QSO as Variable objects: Dragana Ilic & Andjelka Kovacevic
      • 2
        Jannis Necker
      • 3
        Daniela Huppenkothen (Day TBC): Informal presentation about periodicity detection and its pitfalls.
      • 4
        Hogg (Day TBC) -- AGN do not exhibit strictly sinusoidal brightness variations: arxiv 2509.10601
    • QSO for Cosmology/Large Scale Tracers & Data: K. Storey-Fisher; S. Cristiani
      • 5
        Quaia data & Results (Kate Storey-Fisher)
      • 6
        QUBRICS data and results (Stefano Cristiani)
    • QSO for Cosmology/Large Scale Tracers & Data: N. Arsenov & A. Kovacs; M. Shiferaw
      • 7
        Nestor Arsenov / Andras Kovacs: Tracing the high-z cosmic web with Quaia: catalogues of voids and clusters in the quasar distribution

        Tracing the high-z cosmic web with Quaia: catalogues of voids and clusters in the quasar distribution

      • 8
        Mahlet Shiferaw: Fast and accurate Gaia-unWISE quasar mock catalogs from LPT and Eulerian bias

        Fast and accurate Gaia-unWISE quasar mock catalogs from LPT and Eulerian bias

    • Lunch
    • Unconference / Hack or Tutorials: Breakout & Brainstorming session
    • -: Wrap-up of the day
    • Unconference / Hack or Tutorials
    • Lunch
    • Ongoing-work talks: (Time/day TBC)
      • 9
        Mahlet Shiferaw - Quaia
      • 10
        Abby Williams - Quaia (TBC)
      • 11
        Hogg - SphereX (TBC)
      • 12
        Jose Bermejo-Climent: PNG from Quaia

        https://arxiv.org/abs/2601.16948

    • Unconference / Hack
    • -: Wrap-up of the day
    • Unconference / Hack
    • Lunch
    • Unconference / Hack or Tutorials
    • -: Wrap-up of the day
    • Unconference / Hack
    • Lunch
    • -: Share-back, wrap-up and next steps