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First-author publications: Robust Data-driven Metallicities for 175 Million Stars from Gaia XP Spectra; René Andrae, Hans-Walter Rix, Vedant Chandra; submitted to ApJS, 2023 Constraints on the cosmological coupling of black holes from Gaia; René Andrae, Kareem El-Badry; submitted to A&AL, 2023 Gaia Data Release 3: Analysis of the Gaia BP/RP spectra using the General Stellar Parameterizer from Photometry; René Andrae, Morgan Fouesneau, Rosanna Sordo, et al.; submitted to A&A, 2022 Gaia Data Release 2. First stellar parameters from Apsis; René Andrae, Morgan Fouesneau, Orlagh Creevey, et al.; A&A, Volume 616, id.A8, 29 pp., 2018 Assessment of stochastic and deterministic models of 6304 quasar lightcurves from SDSS Stripe 82; René Andrae, Dae-Won Kim & Coryn A.L. Bailer-Jones; A&A, vol. 554, pp. A137, 2013 Only marginal alignment of disc galaxies; René Andrae & Knud Jahnke; MNRAS, vol. 418, pp. 2014-2031, 2011 Quantifying galaxy shapes: Sersiclets and beyond; René Andrae, Peter Melchior & Knud Jahnke; MNRAS, vol. 417, pp. 2465-2477, 2011 Parametrising arbitrary galaxy morphologies: potentials and pitfalls; René Andrae, Knud Jahnke & Peter Melchior; MNRAS, vol. 411, pp. 385-401, 2011 Soft clustering analysis of galaxy morphologies: A worked example with SDSS; René Andrae, Peter Melchior & Matthias Bartelmann; A&A, vol. 522, pp. A21, 2010 Co-author publications: The Poor Old Heart of the Milky Way; H.-W. Rix, V. Chandra, R. Andrae, et al., ApJ, Volume 941, Issue 1, id.45, 15 pp., 2022 I produced the catalog of empirical [M/H] estimates and its validation. I also helped with the scientific interpretation of the results. A Golden Sample of Astrophysical Parameters; Gaia collaboration, O. Creevey, L.M. Sarro, A. Lobel, E. Pancino, R. Andrae, et al., submitted to A&A, 2022 Together with A. Korn, I defined the golden sample of solar analogue candidates. I also used those in order to estimate the colours of the Sun and to demonstrate the impact of interstellar dust attenuation on XP spectra. Gaia Data Release 3: Astrophysical parameters inference system (Apsis) I -- methods and content overview; O. Creevey, R. Sordo, F. Pailler, Y. Fremat, U. Heiter, F. Thevenin, R. Andrae, M. Fouesneau, et al., submitted to A&A, 2022 I contributed the method description for GSP-Phot and several validation tests (e.g. Fig. 27). Gaia Data Release 3: Apsis II - Stellar Parameters; M. Fouesneau, Y. Fremat, R. Andrae, A.J. Korn, et al., submitted to A&A, 2022 I contributed the validation tests for GSP-Phot. Gaia Data Release 3: External calibration of BP/RP low-resolution spectroscopic data; P. Montegriffo, F. De Angeli, R. Andrae, M. Riello, et al., submitted to A&A, 2022 I helped with the statistical formulation of fitting the instrument model and its validation. Gaia Data Release 3: Processing and validation of BP/RP low-resolution spectral data; F. De Angeli, M. Weiler, P. Montegriffo, D.W. Evans, M. Riello, R. Andrae, submitted to A&A, 2022 I coordinated an extensive test campaign that assessed the scientific data quality of various different configurations of XP spectra. Gaia Data Release 3: The Galaxy in your preferred colours. Synthetic photometry from Gaia low-resolution spectra; Gaia collaboration, P. Montegriffo, M. Bellazzini, F. De Angeli, R. Andrae, et al., submitted to A&A, 2022 I was responsible for the empirical uncertainty inflation on the synthetic fluxes described in Sect. 2.1. Gaia Data Release 3: Exploring and mapping the diffuse interstellar band at 862nm; Gaia collaboration, M. Schultheis, H. Zhao, T. Zwitter, ..., R. Andrae, et al., submitted to A&A, 2022 I helped with the comparison of DIB equivalent widths to GSP-Phot's reddening estimates, in particular with tracing outliers. Gaia Data Release 3: Mapping the asymmetric disc of the Milky Way; Gaia collaboration, R. Drimmel, M. Romero-Gomez, L. Chemin, P. Ramos, E. Poggio, V. Ripepi, R. Andrae, et al., submitted to A&A, 2022 I helped with the sample definitions of giants and OB stars. Gaia DR3: Specific processing and validation of all-sky RR Lyrae and Cepheid stars -- The RR Lyrae sample; G. Clementini, V. Ripepi, ..., R. Andrae, et al., submitted to A&A, 2022 I helped with the comparison of extinction estimates for RR Lyrae in Appendix B and the assessment of the impact of RR Lyrae variability on the uncertainties of XP mean spectra in Fig. B.3. Astrophysical parameters from Gaia DR2, 2MASS, and AllWISE; M. Fouesneau, R. Andrae, T. Dharmawardeno, J. Rybizki, C.A.L. Bailer-Jones, M. Demleitner, A&A, Volume 662, id.A125, 22 pp., 2022 The method was developed back-to-back with GSP-Phot. I also helped with the first cross-matches of the data and the validation of the photometry. A Gaia Early DR3 Mock Stellar Catalog: Galactic Prior and Selection Function; J. Rybizki, M. Demleitner, C.A.L. Bailer-Jones, P.D. Tio, T. Cantat-Gaudin, M. Fouesneau, Y. Chen, R. Andrae, L. Girardi, S. Sharma, PASP, Volume 132, Issue 1013, id.074501, 20 pp., 2020 I helped to synthesise realistic Gaia photometry and with realistic uncertainties. Data-Driven Stellar Models; G.M. Green, H.-W. Rix, L. Tschesche, D. Finkbeiner, C. Zucker, E.F. Schlafly, J. Rybizki, M. Fouesneau, R. Andrae, J. Speagle, submitted to ApJ, eprint arXiv:2006.16258, 2020 I provided background information about Gaia data, in particular Gaia photometry and low-resolution BP/RP spectra. Evidence of a dynamically evolving Galactic warp; E. Poggio, R. Drimmel, R. Andrae, C.A.L. Bailer-Jones, M. Fouesneau, M.G. Lattanzi, R.L. Smart, A. Spagna, Nature Astronomy, Volume 4, p. 590-596, 2019 I helped to design the model and its optimisation algorithm. I also helped to validate the results. Quasar and galaxy classification in Gaia Data Release 2; C.A.L. Bailer-Jones, M. Fouesneau, R. Andrae, MNRAS, Volume 490, Issue 4, p.5615-5633, 2019 I developed the total trinomial regression in Appendix B2 in order to infer the true class fractions from the measured values. I also helped to validate the results. The Galactic warp revealed by Gaia DR2 kinematics; E. Poggio, R. Drimmel, M.G. Lattanzi, R.L. Smart, A. Spagna, R. Andrae, et al., MNRAS, Letters, Volume 481, Issue 1, p.L21-L25, 2018 I helped to design the model and its optimisation algorithm. I also helped to validate the results. Estimating Distance from Parallaxes. IV. Distances to 1.33 Billion Stars in Gaia Data Release 2; C.A.L. Bailer-Jones, J. Rybizki, M. Fouesneau, G. Mantelet, R. Andrae, AJ, Volume 156, Issue 2, article id. 58, 11 pp., 2018 I helped to validate and interpret the results. New stellar encounters discovered in the second Gaia data release; C.A.L. Bailer-Jones, J. Rybizki, R. Andrae, M. Fouesneau, A&A, Volume 616, id.A37, 13 pp., 2018 I helped to validate and interpret the results. A Gaia DR2 Mock Stellar Catalog; J. Rybizki, M. Demleitner, M. Fouesneau, C.A.L. Bailer-Jones, H.-W. Rix, R. Andrae, PASP, Volume 130, Issue 989, pp. 074101, 2018 I helped to synthesise realistic Gaia photometry and with realistic uncertainties. Non-local Thermodynamic Equilibrium Stellar Spectroscopy with 1D and >3D< Models. II. Chemical Properties of the Galactic Metal-poor Disk and the Halo; M. Bergemann, R. Collet, R. Schönrich, R. Andrae, et al., AJ, Volume 847, Issue 1, article id. 16, 12 pp., 2017 I computed the LOESS curves in Figs 5 and 6. Do the Most Massive Black Holes at z = 2 Grow via Major Mergers?; M. Mechtley, K. Jahnke, R.A. Windhorst, R. Andrae, et al., AJ, Volume 830, Issue 2, article id. 156, 29 pp. , 2016 I computed the probability for the merger fraction being higher in QSOs than in inactive galaxies in Fig 3. I also contributed to the visual classification of mergers. The Gaia astrophysical parameters inference system (Apsis). Pre-launch description; C.A.L. Bailer-Jones, R. Andrae, et al., A&A, Volume 559, id.A74, 20 pp., 2013 I was responsible for the results of the workpackage called "General Stellar Parametrizer from Photometry". The impact of galaxy interactions on AGN activity in zCOSMOS; J.D. Silverman, P. Kampczyk, K. Jahnke, R. Andrae et al., ApJ, vol. 743, pp. 2, 2011 My contribution was the estimation of intrinsic AGN fractions based on a decision tree that accounts for the non-trivial selection effects in the data. The bulk of the black hole growth since z~1 occurs in a secular universe: No merger-AGN connection; Mauricio Cisternas et al.; ApJ, vol. 726, pp. 57, 2011 I performed the Monte-Carlo sampling from the binomial likelihoods and the Bayesian combination of the ten person's classification results. Deconvolution with Shapelets; Peter Melchior, René Andrae, Matteo Maturi & Matthias Bartelmann; A&A, vol. 493, pp. 727-734, 2009 My contribution to this work was the analytical solution given in the appendix. Unrefereed arXiv manuscripts and conference articles: Dos and don'ts of reduced chi-squared; René Andrae, Tim Schulze-Hartung & Peter Melchior, 2010 Content: In this arXiv manuscript, we review the pitfals of using reduced chi-square. In the astrophysical literature, there are many examples where reduced chi-square is used inadequately such that the results obtained have no credibility. Error estimation in astronomy: A guide; René Andrae, 2010 Content: This arXiv manuscript is an introduction to methods for error estimation that addresses undergraduate and graduate students. I explain the basics of parameter estimation and why error estimation is of vital importance. Then I briefly outline seven methods for error estimation which are applicable in different contexts. Morphological Galaxy Classification with Shapelets; René Andrae & Peter Melchior; AIP Conference Proceedings vol. 1082, pp. 129-133, 2008 Content: A preliminary version of Soft clustering analysis of galaxy morphologies: A worked example with SDSS written for the classification workshop 2008 at Ringberg castle, Germany.