Sayan Saha

College of Science

360 Huntington Ave

Boston, MA 02115, USA

I am an observational astrophysicist specializing in weak gravitational lensing and galaxy cluster astrophysics. As a postdoctoral researcher at Northeastern University, I lead the development of the end-to-end, pixel-to-science pipeline for NASA’s balloon-borne imaging telescope, SuperBIT. My postdoc advisor is Prof. Jacqueline McCleary.

Before joining Northeastern, I completed my PhD at the Indian Institute of Science Education and Research (IISER), Pune, in September 2024, under the guidance of Prof. Tarun Souradeep. My doctoral research primarily focused on developing Bayesian inference techniques for Cosmic Microwave Background (CMB) data analysis. During my PhD, I was awarded the Swiss Government Excellence Scholarship (2022–23) which allowed me to work with Prof. Julien Carron at the University of Geneva on studying high-redshift galaxy clusters using CMB lensing. My PhD thesis can be found here.

selected publications

ApJL (submitted)

Lensing in the Blue IV: The First Weak Gravitational Lensing Maps from the Stratosphere

S. Saha, M. Amit, J. McCleary et al.

Submitted to ApJ Letters, 2026

arXiv Bib

@article{saha2026lensingblue4,
  keywords = {primary},
  title = {Lensing in the {B}lue {IV}: {T}he {F}irst {W}eak {G}ravitational {L}ensing {M}aps from the {S}tratosphere},
  author = {Saha, S. and Amit, M. and McCleary, J. and others},
  journal = {Submitted to ApJ Letters},
  year = {2026},
}

ApJ

Lensing in the Blue III: Weak Lensing Shape Catalogs of 30 Merging Galaxy Clusters

S. Saha, J. McCleary, S. Everett et al.

The Astrophysical Journal, 2026

arXiv Bib HTML

@article{saha2026lensingblue3,
  keywords = {primary},
  title = {Lensing in the {B}lue {III}: {W}eak {L}ensing {S}hape {C}atalogs of 30 {M}erging {G}alaxy {C}lusters},
  author = {Saha, S. and McCleary, J. and Everett, S. and others},
  journal = {The Astrophysical Journal},
  volume = {1011},
  pages = {102},
  year = {2026},
}

JCAP

Cluster profiles from beyond-the-QE CMB lensing mass maps

S. Saha, L. Legrand, and J. Carron

JCAP, 2024

arXiv Bib HTML

@article{saha2024clusterprofiles,
  keywords = {primary},
  title = {Cluster profiles from beyond-the-QE CMB lensing mass maps},
  author = {Saha, S. and Legrand, L. and Carron, J.},
  journal = {JCAP},
  volume = {01},
  pages = {024},
  year = {2024},
}

JCAP

Bayesian estimation of our local motion from the Planck-2018 CMB temperature map

S. Saha, S. Shaikh, S. Mukherjee, T. Souradeep, and B. D. Wandelt

JCAP, 2021

arXiv Bib HTML

@article{saha2021bayesianlocalmotion,
  keywords = {primary},
  title = {Bayesian estimation of our local motion from the {P}lanck-2018 {CMB} temperature map},
  author = {Saha, S. and Shaikh, S. and Mukherjee, S. and Souradeep, T. and Wandelt, B. D.},
  journal = {JCAP},
  volume = {10},
  pages = {072},
  year = {2021},
}