GRAPPA Centre
@grappainstitute.bsky.social
GRAPPA is a centre of excellence of the University of Amsterdam, focussing on Gravitation and Astroparticle Physics.
Reposted by GRAPPA Centre
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 🔭🧪
August 5, 2025 at 9:11 AM
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
August 1, 2025 at 3:45 PM
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
Reposted by GRAPPA Centre
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.
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-...
arxiv.org
June 27, 2025 at 8:29 AM
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 🥳
May 21, 2025 at 1:04 PM
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
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
May 16, 2025 at 9:02 AM
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
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
Reposted by GRAPPA Centre
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.
May 16, 2025 at 8:34 AM
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"
May 12, 2025 at 12:56 PM
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"
March 10, 2025 at 1:30 PM
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!
📢KM3NET DETECTS THE HIGHEST ENERGY NEUTRINO EVER OBSERVED
This #KM3NeT_UHE event KM3-230213A is estimated to have a record neutrino energy of 220 PeV, or 220 million billion electronvolts
➡️For details: www.km3net.org/km3net-webin...
#RecordNeutrino
This #KM3NeT_UHE event KM3-230213A is estimated to have a record neutrino energy of 220 PeV, or 220 million billion electronvolts
➡️For details: www.km3net.org/km3net-webin...
#RecordNeutrino
February 14, 2025 at 10:33 PM
Congrats to the KM3NET collaboration for this fantastic discovery!
Celebrating the start of the year with our fantastic GRAPPA members 🥂🥳🎉
January 28, 2025 at 2:24 PM
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...
www.astronomie.nl/nieuws/jacco...
Jacco Vink (UvA) ontvangt Humboldt-prijs
www.astronomie.nl
January 22, 2025 at 3:22 PM
Huge congrats to @jaccovink.bsky.social for receiving the prestigious German Humboldt Prize for research!
www.astronomie.nl/nieuws/jacco...
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/...
www.pressreader.com/netherlands/...
December 8, 2024 at 1:06 PM
Inspiring and wonderful article about former GRAPPA PhD student Gimmy Tomaselli on dutch newspaper NRC. Congratulations!
www.pressreader.com/netherlands/...
www.pressreader.com/netherlands/...
Reposted by GRAPPA Centre
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
November 27, 2024 at 8:16 PM
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
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
November 10, 2024 at 11:26 PM
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
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)
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)
March 25, 2024 at 12:20 PM
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)
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)
Reposted by GRAPPA Centre
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
January 31, 2024 at 1:46 PM
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
As if there wasn't enough to celebrate with the new EHT results today, my @uva-api.bsky.social and @grappainstitute.bsky.social colleague @samayanissanke.bsky.social has just been awarded the
American Astronomical Society HEAD Mid-Career prize for her work on multi-messenger astrophysics!! 🎉🎉🎉
American Astronomical Society HEAD Mid-Career prize for her work on multi-messenger astrophysics!! 🎉🎉🎉
January 18, 2024 at 12:31 PM
Many many congratulations @samayanissanke.bsky.social ! We are so proud of you
Celebrating and sharing the New Year with our fantastic GRAPPA members 🎉🎉🎉
January 15, 2024 at 9:06 PM
Celebrating and sharing the New Year with our fantastic GRAPPA members 🎉🎉🎉
Reposted by GRAPPA Centre
'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
Onderzoekers (o.a. Jacco Vink) presenteren analyse tijdens congres van de American Astronomical Society.
📡 www.astronomie.nl/ni...
#astrodon #astronomie #astronomy
January 8, 2024 at 4:15 PM
'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
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...
iop.uva.nl/content/news...
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...
iop.uva.nl
December 18, 2023 at 12:09 PM
Huge congratulations to Prof. Daniel Baumann for receiving prestigious Humboldt Research Award! 🥳🥳🥳
iop.uva.nl/content/news...
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
December 4, 2023 at 4:06 PM
Check out the new poetic-philosophical documentary "Neutrino", with the participation of GRAPPA member Patrick Decowski! More info at neutrinofilm.nl
Reposted by GRAPPA Centre
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 🙏🏾
November 21, 2023 at 7:27 AM
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 🙏🏾