Jeyhan Kartaltepe
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jeyhan.bsky.social
Jeyhan Kartaltepe
@jeyhan.bsky.social
390 followers 170 following 13 posts
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).
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I'm traveling through space!!
Reposted by Jeyhan Kartaltepe
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.
COSMOS-Web opens window into universe for scientists and citizens
Supported by RIT’s Jeyhan Kartaltepe, COSMOS-Web—the largest JWST Cycle 1 observation program— has made its full data set publicly available.
www.rit.edu
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).
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
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
Reposted by Jeyhan Kartaltepe
Reposted by Jeyhan Kartaltepe
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
My PhD student Rohan Pattnaik's first paper on the machine learning tool he developed to automatically measure redshifts directly from galaxy spectra, SpecPT, is now out. The results are have surpassed my expectations and I can't wait until we extend this to other datasets!
arxiv.org/abs/2501.01070
Reposted by Jeyhan Kartaltepe
Reposted by Jeyhan Kartaltepe
Second galaxy to the right and straight on until cosmic dawn! This video takes you on a journey through our CEERS JWST images and cosmic history. Every second we travel 200 Million lightyears into the past on our way to Maisie's Galaxy which existed ~13.4 Billion years ago!
CEERS: Flight to Maisie's Galaxy
This 3D visualization portrays about 5,000 galaxies within a small portion of the CEERS (Cosmic Evolution Early Release Science) Survey, which gathered data ...
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Ok, I do love that with very little effort, I have a feed for Cat pics!
Good to know the tricks! Thanks!