Associate Professor at RIT investigating galaxy evolution. Co-lead of the COSMOS Collaboration. Passionate about public outreach, science communication, and inclusivity. Currently working on all things JWST (especially, COSMOS-Web, CEERS, NGDEEP, PRIMER).
Jeyhan Kartaltepe
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The international NASA's James Webb Space Telescope COSMOS-Web team, led by @ritscience.bsky.social researchers, has made an unprecedented amount of information available for future discovery! Explore the largest view deep into the #universe through a searchable catalog now available to the public.
Recap some of #NASAWebb’s biggest early-universe discoveries (so far) with the astronomers who are doing the science. 🔭 🧪
And finally, Shuntov et al. present the catalog, including photometric measurements in 37 bands (including #jwst, #hst, #spitzer, and ground-based telescopes), physical parameters (like redshift and stellar mass), and morphological parameters.
arxiv.org/abs/2506.03243
Then, Harish et al. describe the MIRI data reduction and present the galaxy number counts. arxiv.org/abs/2506.03306
Along with the data, we have released three papers describing the data reduction and catalog process.
First, Franco et al. describe the NIRCam data reduction process and challenges for handling a dataset of this size. arxiv.org/abs/2506.03256
Check out our team's coordinated press release and reach out if you have any questions about the data!
cosmos.astro.caltech.edu/news/87
Ali Ahmad Khostovan, et al.: COSMOS Spectroscopic Redshift Compilation (First Data Release): 165k Redshifts Encompassing Two Decades of Spectroscopy https://arxiv.org/abs/2503.00120 https://arxiv.org/pdf/2503.00120 https://arxiv.org/html/2503.00120
Our release includes an interactive viewer where you can explore the images, display the spectroscopic redshifts (Khostovan et al. 2025) and information from the photometric catalog (including their full SED, photometric redshift, the cutout images in each filter, and the zPDF).
It's finally here! We've just released all of our COSMOS-Web images and catalogs, along with an interactive viewer where you can explore the data! Check it out at: cosmos2025.iap.fr
Jeyhan Kartaltepe
"I don't know if the James Webb Space Telescope will ever cover an area of this size again."
We present COSMOS2025, the COSMOS-Web catalog of photometry, morphology, photometric redshifts and physical parameters for more than 700,000 galaxies in the Cosmic Evolution Survey (COSMOS) field. Thi...
arxiv.org
Jeyhan Kartaltepe
Supported by RIT’s Jeyhan Kartaltepe, COSMOS-Web—the largest JWST Cycle 1 observation program— has made its full data set publicly available.
