iiinova — where your digital self keeps evolving

Niko @nikosarcevic.com · 01/08/2026

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

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Niko @nikosarcevic.com · 24/07/2026

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)

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Guen P @guenp.bsky.social · 29/06/2026

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

A flyer showing the schedule for the Physics and Astronomy track at SciPy 2026
1:15 PM, 30 min. Discovering Particles: How we analyze petabytes of particle collision data using python
Iason Krommydas
1:55 PM, 30min. QDK/Chemistry: A Composable Python Toolkit for End-to-End Quantum Chemistry on Quantum Computers
David Williams-Young
2:35 PM, 30min. DerivKit: End-to-End Derivative-Based Inference in Scientific Python
Niko Sarcevic, Matthijs van der Wild

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Niko @nikosarcevic.com · 11/06/2026

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

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Niko @nikosarcevic.com · 10/06/2026

I’m doing science physics

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Niko @nikosarcevic.com · 09/06/2026

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.

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AstroArxiv @astroarxiv.bsky.social · 29/05/2026

cloelib: A Flexible Python Library for Computing Cosmological Observables in the Euclid Era. Marco Bonici et. al. arxiv.org/abs/2605.23839

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Niko @nikosarcevic.com · 25/05/2026

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?...

youtu.be

a PhD is a doctorate, it is literally describing a doctor -- Brooklyn 99

YouTube video by Estefanía Torres

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Niko @nikosarcevic.com · 07/05/2026

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 🥹🥹🥹🥹

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Petnica Summer Institute @psi-petnica.bsky.social · 23/04/2026

🚨🚨🚨 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.rs

PSI – Petnica Summer Institute

Intensive summer schools in theoretical physics, phenomenology, quantum technologies, and machine learning at the Petnica Science Center, Serbia.

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Niko @nikosarcevic.com · 21/04/2026

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

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Niko @nikosarcevic.com · 17/04/2026

How awesome is this?!

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Niko @nikosarcevic.com · 24/03/2026

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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Niko @nikosarcevic.com · 21/03/2026

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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Niko @nikosarcevic.com · 16/03/2026

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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a man with a beard is holding a microphone in front of a crowd .

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Niko @nikosarcevic.com · 14/03/2026

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)

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Niko @nikosarcevic.com · 11/03/2026

I am a science machine 💪💪💪💪 4th paper fresh on the @arxiv.bsky.social this year 🥳🥳🥳 arxiv.org/pdf/2603.09973

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Niko @nikosarcevic.com · 05/03/2026

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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a man says it 's very refreshing while wearing a jacket

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AstroArxiv @astroarxiv.bsky.social · 26/02/2026

Impact and interplay of $Λ$CDM analysis choices for LSST cosmic shear. N. C. Robertson et. al. arxiv.org/abs/2602.21863

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Niko @nikosarcevic.com · 03/03/2026

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

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Niko @nikosarcevic.com · 26/02/2026

Two more works on the @arxiv 🥳🥳🥳 arxiv.org/abs/2602.21863 arxiv.org/abs/2602.21280

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Niko @nikosarcevic.com · 10/02/2026

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...

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Niko @nikosarcevic.com · 13/01/2026

Ok, aside that this was ten years ago (wthhhhell 😱) and I now feel ancient, it is actually nice to be reminded of good times during masters in Göttingen: Thorsten was my lecturer in cosmology and string theory courses and was super encouraging. Made me fall in love with cosmo 🤩

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Niko @nikosarcevic.com · 04/01/2026

Actually — the first burek in the states since I moved 😱 Found the ingredients at Whole Foods Also a selfie just because

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Niko @nikosarcevic.com · 01/01/2026

X marks the spot Happy first day of 2026! It’s cold here but nothing beats the Carolina blue 😍

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Niko @nikosarcevic.com · 19/12/2025

There probably are a few things better than talking to Alan Heavens about a potential idea then heading to the woods and mulching sumac trees (for the lemurs!) with your best guy on a warm December morning but I can’t think of any right now. I just love the 🇺🇸 🍂🛻🪏

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Niko @nikosarcevic.com · 11/12/2025

I swear if I hear another physicist say “we are not software engineers and we should not try to be” I’ll flip the freaking table. No, Dave, it exactly is our job. You need to know how to tell computer to do physics. And you are doing it in a very bad way. 1/

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Michael Zingale @michaelzingale.bsky.social · 04/12/2025

last day of classes! here's the collection of Jupyter notebooks illustrating stellar physics concepts I made for my grad Stars class this semester: zingale.github.io/stars/notebo... #astro

zingale.github.io

PHY 521: Stars — PHY 521 Fall 2025

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Niko @nikosarcevic.com · 02/12/2025

If you are around these parts, come and join us for a pint and a nice story about the Universe

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Niko @nikosarcevic.com · 02/12/2025

🤣🤣🤣🤣🤣🤣

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AstroArxiv @astroarxiv.bsky.social · 25/11/2025

Investigating the Dark Energy Constraint from Strongly Lensed AGN at LSST-Scale. Sydney Erickson et. al. arxiv.org/abs/2511.13669

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Niko @nikosarcevic.com · 24/11/2025

I can say with full confidence I’m the happiest person on this planet right now. Seeing the Roman Space Telescope being assembled — and knowing it’ll be in orbit next year — just makes it unreal.

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Niko @nikosarcevic.com · 22/11/2025

It’s a wrap! @nasaromantelescope.bsky.social NASA Roman HLIS Cosmology Project Infrastructure Team face to face meeting Thank you to Bhuv, Mike and the rest of UPenn folk for hosting us 🙏

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Niko @nikosarcevic.com · 17/11/2025

Hey all I need help from my physics peeps (and beyond) Do you (or if you are a PI: your students/postdocs) use numerical derivatives in your research? Especially in inference (but also in general) Apparently I can’t do a poll here so pls respond and share

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Niko @nikosarcevic.com · 10/11/2025

The only acceptable way to start the Leiden research visit is to have coffee with Dr Evil Villain (in our secret Narnia caffe) @ivovanvulpen.bsky.social (For those of you who don’t know, Ivo is responsible for the amazing wall formulas in Leiden; see photo 2 where Matthijs and I are kissing)

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Niko @nikosarcevic.com · 09/11/2025

Happy to be back in one of the loveliest places on this planet 🇳🇱🚲🌷🧀🌊

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William Barter @wjbarter.bsky.social · 08/11/2025

Interested in a fully funded PhD place in Experimental Particle Physics in Edinburgh? We have fully funded studentships, including a specific scholarship for students from a Black heritage (including mixed Black background). More info: inspirehep.net/jobs/3080808

inspirehep.net

INSPIRE

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AstroArxiv @astroarxiv.bsky.social · 05/11/2025