Niko
@nikosarcevic.com
human person (she) | cosmologist at Duke University | member of @LSSTDESC @Roman | did physics @XENONexperiment | loves plots, coats, and The Wire | opinions mine
Not sure if I ever shared but I’m obsessed with lighting (hello, photons! 😆) I have so many lamps, plugins etc it’s embarrassing at this point. But in any case I just bought a new lamp and it’s so freaking gorgeous I caaaaaant
I’m deeply honored to share I am now a builder within LSST DESC! This means I have made significant contributions to the collaboration I am in position to be added to every publication from now on (with certain caveats)
The 25th annual #SciPy2026 conference is only two weeks away! Join us in Minnesota or virtually for a plethora of scientific Python talks, including the Physics and Astronomy track 👀 see the full schedule at scipy2026.scipy.org/schedule You can sign up here 👉 ti.to/scipy/scipy2026
Fresh on the @arxiv 💪 Check out how baryons and nonlinear galaxy bias (and scales) impact the 3x2pt analysis in the LSST scenario arxiv.org/abs/2606.10679
I’ve been obsessed with Langewiesche’s writing since I discovered his @theatlantic.com articles. If someone had told me I’d be into a book about shipping and maritime stuff, man… He was such a master of narrative nonfiction that he can make any subject fascinating.
cloelib: A Flexible Python Library for Computing Cosmological Observables in the Euclid Era. Marco Bonici et. al. https://arxiv.org/abs/2605.23839
Over on Twitter a debate of medical doctor vs PhD and who is in the “right” is peeking its head again. I guess we have to have it at least once a year 😂 For me it’s always an excuse to pull this gem out Also: RIP Andre. What an actor he was. Pembleton forever! youtu.be/xYOK-2Q75wE?...
a PhD is a doctorate, it is literally describing a doctor -- Brooklyn 99
YouTube video by Estefanía Torres
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If someone told me 10 years ago that I’d be giving a talk at @scipyconf.bsky.social, I would’ve called them crazy. I’m incredibly honored that the SciPy organizers think derivkit is worthy of a talk! Thank you, SciPy team 🥹🥹🥹🥹
🚨🚨🚨 Only a few weeks left to apply for summer schools in physics (MSc / junior PhD): • Dark Universe - May 10 • Quantum Gravity & Quantum Chaos - May 10 • Scientific ML - May 15
PSI – Petnica Summer Institute
Intensive summer schools in theoretical physics, phenomenology, quantum technologies, and machine learning at the Petnica Science Center, Serbia.
psi.petnica.rs
Fresh on @arxiv 🥳🥳🥳🥳 Blinding in cosmology is especially challenging: unlike particle physics, our signal is statistical, subtle, and extracted through a long inference chain. Excited to share the official LSST DESC tool for blind analyses: arxiv.org/abs/2604.18111
SBI Field Level Inference workshop at Perimeter this June Hurry up! events.perimeterinstitute.ca/event/1924/
Advancing Field-level and Simulation-based Inference for Cosmology
Field-level inference has recently emerged as a powerful alternative to traditional summary-statistic approaches in the analysis of cosmological data sets. This technique exploits the full information...
events.perimeterinstitute.ca
Working on the problem from two completely different angles is the best part of this project we’ve been hammering for months Matthijs: pristine, elegant, mathematically flawless Niko: “okay but imagine the posterior is a traffic cone…” Somehow… we are both correct 🤣🤣
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Apparently Matthew McConaughey was at Duke today and I missed meeting him because I was stuck in telecons/working from home This is NOT alright alright alright I’m really upset
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Minor pet peeve: describing ΛCDM-based analyses as having the “potential to discover new physics.” They can reveal tensions or inconsistencies that may motivate extensions to the model — but that’s not the same as discovering new physics. Cmon my man, tone that down
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Happy bday, arXiv! You are the best! Funny coincidence is that I chose to wear one of my arXiv shirts (which are top quality btw! Hoodies as well, highly recommend)
arXiv@arxiv.bsky.social · 6mo ago2️⃣ more hours to give to arXiv on Giving Day! Donate now - your gift makes a big impact. Gift amounts to consider: 🍰 arXiv's birthday 💌 your favorite paper's arXiv identifier 📜 # of arXiv papers you downloaded 😵 # of arXiv papers you actually read https://givingday.cornell.edu/campaigns/arxiv
I am a science machine 💪💪💪💪 4th paper fresh on the @arxiv.bsky.social this year 🥳🥳🥳 arxiv.org/pdf/2603.09973
I was in a clusters telecon today (not my usual working group) and am so beyond impressed by the quality of plots people were showing. I find it so refreshing to see there are people out there who care about communicating their research
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Impact and interplay of $Λ$CDM analysis choices for LSST cosmic shear. N. C. Robertson et. al. https://arxiv.org/abs/2602.21863
Starting the day shearing dead weeds in the forest and cutting through mountain mint — that sharp minty scent mixed with damp, rotting leaves — pure peace for the soul 🌿 And catching up with the wonderful folks over at @DukeLemurCenter is just 👌chefs kiss
Aaaaaand it’s officially on @arxiv.bsky.social 🥳🥳 arxiv.org/abs/2602.08078 Wanna do Fisher, XY Fisher or DALI with a chosen derivative method backend in a simple sleek Python way? Look no further, my friend. We got you! Simple examples here docs.derivkit.org/main/example...
