Simon Samuroff

Wean Hall 8315, +1 (412) 268 1886 Department of Physics, [email protected] Carnegie Mellon University, http://andrew.cmu.edu/user/ssamurof 5000 Forbes Avenue Pittsburgh PA 15213, USA

Research Interests

My interests broadly fall under the label of data-led . More specifically I am interested in weak lensing cosmology, the statistics of shape measurement and the intrinsic alignment of galaxies. My research also touches upon the extent to which complementary observational probes can be used to mitigate lensing systematics, which can bias our inferences about the evolution and structure of the Universe. I am actively involved in the Survey and the LSST Dark Energy Science Collaboration.

Employment

• 2017-present Postdoctoral Research Associate, Carnegie Mellon University, Contact faculty: Prof. Rachel Mandelbaum

Education

• 2014-2017 PhD Physics (STFC funded), Supervisor: Prof. Sarah Bridle Thesis title: Systematic Biases in Weak Lensing Cosmology with the • 2013-14 MPhys research project, University of Manchester Report title: Searching for Bursts of Radio Emission from beyond the Galaxy • 2010-14 MPhys Physics with (hons), University of Manchester, performance-based academic scholarship each year, Degree classification: 1st with honours

Selected Talks and Conferences

• Accurate Lensing in the Era of Precision Cosmology, BBCP Berkeley Jan 2019: invited talk entitled “Intrinsic Alignments: Observational Constraints and Model Testing with the Dark Energy Survey”

• Annual Fermilab Users Meeting, Fermilab June 2018: invited talk entitled “Systematic Biases in Weak Lensing Cosmology with the Dark Energy Survey”

• Statistical Challenges for Large Scale Structure in the Era of LSST, Oxford April 2018: invited talk entitled “Exploring Intrinsic Alignments in DES Y1: A Multiprobe Analysis”

• LSST DESC Deblending Task Force Discussion, (remote) November 2017: invited talk entitled “im3shape and Deblending in the DES”

• DES Collaboration Meeting, Cambridge December 2016: invited talks, including overview talk and tutorial on the Y1 im3shape catalogues

• DES Weak Lensing Working Group Y1 Workshop, Ohio State University November 2016: invited talk entitled “im3shape v2: The Second Y1 Catalog Release and New Calibrations”

• UCL Cosmology Seminar Series August 2016: invited talk, entitled “Systematics from the Data: Internal Constraints on Cosmic Shear Biases with Year 1 of the Dark Energy Survey”

• GravLens Conference, Leiden July 2016: contributed poster on behalf of DES Multi-Probe Pipeline cosmology working group

• DES Collaboration Meeting, SLAC May 2016: 3 talks, including invited discussion of the Y1 shear catalogues on behalf of the im3shape group

• JBCA Internal Seminar and arXiv Review Series 2014-2017: regular contributions

Programming Languages and Computing Experience

• python • C • C++ • bash • Batch job management experience (SLURM & PBS) on high-power computing clusters at NERSC, Manchester and Carnegie Mellon University • Experience managing large-volume data on NERSC and BNL servers

Teaching

• 2014-15 Undergraduate Physics Lab Demonstration, University of Manchester

Professional Affiliations and Activities

• Royal Astronomical Society, Fellow

• Institute of Physics, Member

• Referee for A&A, ApJ and MNRAS

• Contact person for DES Y1 im3shape catalogue public release

• LOC member for DESC Summer Collaboration Meeting 2018 at CMU

• LOC member and primary contact for DES Year 3 Key Project Workshop at CMU, July 2018

• SafeZone Training, CMU, October 2018

Outreach and Volunteering

• Astronomy on Tap, Pittsburgh 2017-present, Organiser and promoter

• Volunteer at Shakespeare’s Globe Theatre London 2012-2014, Steward and guide

• Volunteer at Housmans Bookshop King’s Cross, London 2011

Awards and Recognition

• Dark Energy Survey data rights (1 FTE year infrastructure contributions)

• Winner of the Fermilab URA Graduate Thesis Award 2018, sponsors: Joshua Frieman (Fermilab) and David Bacon (University of Portsmouth)

• Doctoral Training Grant from the UK Science and Technology Facilities Council 2014-2017

• University of Manchester Academic Bursary 2010-2014 Scholarship support per year, contingent on academic results

Other Relevant Experience

• Major infrastructure contributions to the Dark Energy Survey include o Designed, implemented and ran the image simulations used to calibrate the Y1 shape catalogues and performed im3shape shear calibration calculations

Publications in preparation (pre-arXiv)

1. A Direct Measurement of Intrinsic Alignments in Red and Blue Galaxies using DES Y3 and eBOSS S. Samuroff, S. Singh et al, R. Mandelbaum et al

2. Constraining and Testing Intrinsic Alignment Models using Hydrodynamic Simulations S. Samuroff, R. Mandelbaum et al

Publications Under Peer Review (arXiv)

1. Dark Energy Survey Year One Results: Multi-Probe Methodology and Simulated Likelihood Analyses Submitted to PRD (2017), arXiv:1708.015359 E. Krause, T.F. Eifler and 84 coathors, including S. Samuroff on tier 2 I helped to build the multi-probe analysis framework used and contributed to planning this work.

Accepted Journal Articles

1. Testing the Impact of Satellite Anisotropy on Large and Small Scale Intrinsic Alignments using Hydrodynamical Simulations MNRAS (2019), arXiv:1901.09925 S. Samuroff, R. Mandelbaum and T. Di Matteo I devised and led this project, producing all figures and the majority of the text

2. Dark Energy Survey Year One Results: Constraints on Intrinsic Alignments and their Colour Dependence from Galaxy Clustering and Weak Lensing MNRAS Vol 489, Issue 4 (2019), arXiv:1811.06989 S. Samuroff, J. Blazek, M.A. Troxel and 70 coauthors I devised and led this project, producing all figures and the majority of the text

3. Cosmological Lensing Ratios with DES Y1, SPT and Planck MNRAS Vol 487, Issue 1 (2018), arXiv:1810.02212 J. Prat, E.J. Baxter and additional coauthors, including S. Samuroff on tier 2 I was an internal reviewer, editing the text. I also contributed to the shear catalogues used in this work.

4. Dark Energy Survey Year One Results: Weak Lensing Shape Catalogues MNRAS Vol 481, Issue 1 (2017), arXiv:1708.01533 J. Zuntz, E.S. Sheldon, S. Samuroff et al I co-led the im3shape part of this analysis, producing the majority of the figures and text in sections 5, 7.3, and the appendices.

5. Dark Energy Survey Year One Results: Cosmological Constraints from Cosmic Shear PRD Vol 98, Issue 4 (2017), arXiv:1708.01538 M. Troxel and additional coauthors, including S. Samuroff on tier 1 I played a part in this analysis, running MC chains and contributing to the paper text.

6. Dark Energy Survey Year One Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing PRD Vol 98 (2017), arXiv:1708.01530 199 alphabetically ordered authors, including S. Samuroff I helped to build the multi-probe analysis framework and contributed to planning the analysis and the construction of the shear catalogues used.

7. Dark Energy Survey Year One Results: The Impact of Galaxy Neighbours on Weak Lensing Cosmology with im3shape S. Samuroff, S.L. Bridle, J. Zuntz et al MNRAS Vol 475, Issue 4 (2017), arXiv:1708.01534 I led this analysis, producing all figures and the majority of the paper text.

8. Simultaneous Constraints on Cosmology and Photometric Redshift Bias from Weak Lensing and Galaxy Clustering S. Samuroff, M.A. Troxel, S.L. Bridle, J. Zuntz, N. MacCrann, E. Krause, T. Eifler, D. Kirk MNRAS Letters Vol 465, Issue 1 (2016), arXiv:1607.07910 I led this analysis, producing all figures and the majority of the paper text.

9. The DES Science Verification Weak Lensing Shear Catalogues M. Jarvis and 94 additional authors, including S. Samuroff on tier two MNRAS Vol 460, Issue 2 (2015), arXiv:1507.05603 I helped in validating and performing cross-checks on the catalogues presented in this paper. Specifically I produced figures 25 and 27, and wrote all text in section 8.1.

10. Cosmology from Cosmic Shear with DES Science Verification Data The Dark Energy Survey Collaboration, 129 authors in alphabetical order, including S. Samuroff. Phys. Rev. D 94, 022001 (2015), arXiv:1507.05552 I contributed text and worked with the corresponding authors to develop the code base for this paper.

11. Cosmology constraints from shear peak statistics in Dark Energy Survey Science Verification data T. Kacprzak, D. Kirk, O. Friedrich and 81 additional authors, including S. Samuroff on tier 2 MNRAS, Vol 463, Issue 4 (2016), arXiv:1603.05040

I contributed to the shear catalogues and to the development of this paper