One more paper from the group out arxiv.org/abs/2508.00062 🎉 Led by Lieke Sippens Groenewegen, who finished her MSc in my group @grappainstitute.bsky.social in February, and with @sanjanacurtis.bsky.social we developed an end-to-end pipeline for kilonova lightcurves and spectra #highenergyastro 🔭🧪

Looking for a summer read? Check out this new GRAPPA paper! arxiv.org/abs/2507.22990 The authors introduce a simple method to construct an effective simulator for *any* explicit likelihood, using samples from a previous MCMC

To kick off here on bluesky I wanted to share some recent work from the group. First off arxiv.org/abs/2504.11537, the first science paper produced with our new GPU-accelerated GRMHD code GRaM-X.

Huge congratulations to Dr. Uddipta Bhardwaj, who successfully defended his PhD thesis "Sequentially learning Gravity" on the 19th of May 2025 🥳

New GRAPPA paper! arxiv.org/abs/2505.097... The authors (Rodrigo Vicente, Theophanes Karydas, @gfbertone.bsky.social) introduce a relativistic framework to model environmental effects on extreme mass-ratio inspirals (EMRIs) in collisionless media

I like to bring your attention to a recently accepted paper by me, my student Manan Agarwal and several members of the XRISM science on the magnificent supernova remnant Cassiopeia A: arxiv.org/abs/2505.04691.

Today we had a fantastic Colloquium by Dr. Malcolm Fairbairn (@KingsCollegeLon) to tell us about "Galaxies, Axions, Gravitational Waves, Black Holes and More Galaxies"

It's a real pleasure to have Dr. Jonathan Gair (@mpi_grav) giving the GRAPPA Colloquium today, to tell us about "Opportunities and challenges in SBI for future gravitational wave detectors"

Congrats to the KM3NET collaboration for this fantastic discovery!

Celebrating the start of the year with our fantastic GRAPPA members 🥂🥳🎉

Huge congrats to @jaccovink.bsky.social for receiving the prestigious German Humboldt Prize for research! www.astronomie.nl/nieuws/jacco...

Inspiring and wonderful article about former GRAPPA PhD student Gimmy Tomaselli on dutch newspaper NRC. Congratulations! www.pressreader.com/netherlands/...

Huge congratulations to Dr Ben Miller @bkmi.bsky.social on a fabulous PhD defence and thesis on “Machine Learning for Scientific Simulation: Inference and Generative Models.” The thesis is such a great reference for simulation based reference & a real tour de force! Proud of you & to have been your

Paper alert! The authors introduce a fast and accurate method to reconstruct the cosmological initial conditions from present-day dark matter density fields, including uncertainty quantification! arxiv.org/abs/2410.15808 Led by GRAPPA PhD Oleg Savchenko

New GRAPPA paper! arxiv.org/abs/2403.14750 The authors show the first application of Marginal Neural Ratio Estimation (MNRE) to accelerate parameter inference from upcoming Stage IV photometric surveys (like Euclid or LSST)

Thrilled that the @_nikhef bachelors gravitational wave workshop that I am teaching @IoP_UvA @UvA_Science got to hang out with Dave Reitze director of @LIGO , Albert Lazzarini, Stuart Anderson & Jess McIver deputy spokesperson

Many many congratulations @samayanissanke.bsky.social ! We are so proud of you

Celebrating and sharing the New Year with our fantastic GRAPPA members 🎉🎉🎉

'Groen monster' was er al voordat Cassiopeia A ontplofte. Onderzoekers (o.a. Jacco Vink) presenteren analyse tijdens congres van de American Astronomical Society. 📡 www.astronomie.nl/ni... #astrodon #astronomie #astronomy

Huge congratulations to Prof. Daniel Baumann for receiving prestigious Humboldt Research Award! 🥳🥳🥳 iop.uva.nl/content/news...

Check out the new poetic-philosophical documentary "Neutrino", with the participation of GRAPPA member Patrick Decowski! More info at neutrinofilm.nl

A lovely greet & meet jamboree @GRAPPAinstitute yesterday afternoon! So special to meet new members & felt v energized by the excitement about astroparticle physics, gravity and life in the room. So nice to work with such a diverse group of individuals 🙏🏾