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GRAPPA Centre

@grappainstitute.bsky.social
378 followers 81 following 25 posts

GRAPPA is a centre of excellence of the University of Amsterdam, focussing on Gravitation and Astroparticle Physics.

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Sera Markoff @profsera.bsky.social · 27/12/2025
If you're a multi-messenger astrophysicist 🔭🧪 with a particular interest in gravitational waves and neutrinos, please consider applying to our open faculty position within @grappainstitute.bsky.social at the University of Amsterdam. It's a great place to work, and AMS is a great place to live!!
werkenbij.uva.nl
Vacancy — Faculty position in GRAPPA Center of Excellence
<p>Do you enjoy working in an interdisciplinary research setting and do you want to be active in the area of gravitational-wave and multi-messenger astrophysics? The Gravitation and Astroparticle Physics Amsterdam (<a href="https://www.grappa.amsterdam/">GRAPPA</a>) Centre of Excellence at The University of Amsterdam is seeking to hire one assistant/associate professor. We are especially interested in candidates that can strengthen our connection to current and future gravitational-wave, neutrino, and electromagnetic observatories. We have a strong preference for a staff member who enhances the diversity of our staff and will prioritize applicants from members of underrepresented groups.</p>
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Reposted by GRAPPA Centre
Philipp Mösta @philippmoesta.bsky.social · 05/08/2025
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 🔭🧪
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GRAPPA Centre @grappainstitute.bsky.social · 01/08/2025
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
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Reposted by GRAPPA Centre
Philipp Mösta @philippmoesta.bsky.social · 27/06/2025
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.
arxiv.org
3D full-GR simulations of magnetorotational core-collapse supernovae on GPUs: A systematic study of rotation rates and magnetic fields
We present a series of fully three-dimensional, dynamical-spacetime general relativistic magnetohydrodynamics (GRMHD) simulations of core-collapse supernovae (CCSNe) for a progenitor of zero-age-main-...
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GRAPPA Centre @grappainstitute.bsky.social · 21/05/2025
Huge congratulations to Dr. Uddipta Bhardwaj, who successfully defended his PhD thesis "Sequentially learning Gravity" on the 19th of May 2025 🥳
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GRAPPA Centre @grappainstitute.bsky.social · 16/05/2025
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
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Reposted by GRAPPA Centre
Jacco Vink @jaccovink.bsky.social · 16/05/2025
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.
Map of the "blue component" of the Doppler velocities (left) and the "red component" of the Doppler velocities. Note that the "red component" in the southeast is still blueshifted, and the "blue component" in the NW is mostly redshifted.
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GRAPPA Centre @grappainstitute.bsky.social · 12/05/2025
Today we had a fantastic Colloquium by Dr. Malcolm Fairbairn (@KingsCollegeLon) to tell us about "Galaxies, Axions, Gravitational Waves, Black Holes and More Galaxies"
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GRAPPA Centre @grappainstitute.bsky.social · 10/03/2025
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"
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GRAPPA Centre @grappainstitute.bsky.social · 14/02/2025
Congrats to the KM3NET collaboration for this fantastic discovery!
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GRAPPA Centre @grappainstitute.bsky.social · 28/01/2025
Celebrating the start of the year with our fantastic GRAPPA members 🥂🥳🎉
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GRAPPA Centre @grappainstitute.bsky.social · 22/01/2025
Huge congrats to @jaccovink.bsky.social for receiving the prestigious German Humboldt Prize for research! www.astronomie.nl/nieuws/jacco...
astronomie.nl
Jacco Vink (UvA) ontvangt Humboldt-prijs
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GRAPPA Centre @grappainstitute.bsky.social · 08/12/2024
Inspiring and wonderful article about former GRAPPA PhD student Gimmy Tomaselli on dutch newspaper NRC. Congratulations! www.pressreader.com/netherlands/...
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Samaya Nissanke (she/her) @samayanissanke.bsky.social · 27/11/2024
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
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GRAPPA Centre @grappainstitute.bsky.social · 10/11/2024
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
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GRAPPA Centre @grappainstitute.bsky.social · 25/03/2024
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)
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Samaya Nissanke (she/her) @samayanissanke.bsky.social · 31/01/2024
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
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GRAPPA Centre @grappainstitute.bsky.social · 18/01/2024
Many many congratulations @samayanissanke.bsky.social ! We are so proud of you
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GRAPPA Centre @grappainstitute.bsky.social · 15/01/2024
Celebrating and sharing the New Year with our fantastic GRAPPA members 🎉🎉🎉
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Reposted by GRAPPA Centre
astronomie.nl @astronomienl.bsky.social · 08/01/2024
'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
Samengestelde afbeelding in valse kleuren van  Cassiopeia A met daarbij groene slierten: het groene monster. De slierten bevinden zich in het midden. Verder naar buiten is de nevel blauw. En weer verder rood. Credit: NASA, ESA, CSA, Milisavljevic et al & Vink et al.
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GRAPPA Centre @grappainstitute.bsky.social · 18/12/2023
Huge congratulations to Prof. Daniel Baumann for receiving prestigious Humboldt Research Award! 🥳🥳🥳 iop.uva.nl/content/news...
iop.uva.nl
Daniel Baumann receives Humboldt Research Award - IoP
Daniel Baumann, professor at the UvA Institute of Physics, is one of the recipients of the prestigious Humboldt Research Award. The award has been granted in recognition of Baumann’s past accomplish...
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GRAPPA Centre @grappainstitute.bsky.social · 04/12/2023
Check out the new poetic-philosophical documentary "Neutrino", with the participation of GRAPPA member Patrick Decowski! More info at neutrinofilm.nl
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Samaya Nissanke (she/her) @samayanissanke.bsky.social · 21/11/2023
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 🙏🏾
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