Mehdy Lefkir
@mlefkir.bsky.social
Stochastic 🎲 PhD student at the University of Leicester.
Looking at black holes 🕳
Looking at black holes 🕳
Reposted by Mehdy Lefkir
🔭🧪🎢 PhD Project focus: AGN variability: hidden signals in the noise
We're advertising this project with Prof Simon Vaughan, analysing AGN with methods that go beyond traditional models and assumptions
For details of all our PhD projects look here: le.ac.uk/study/resear... 🔭🧪🎢
We're advertising this project with Prof Simon Vaughan, analysing AGN with methods that go beyond traditional models and assumptions
For details of all our PhD projects look here: le.ac.uk/study/resear... 🔭🧪🎢
STFC | Postgraduate research | University of Leicester
STFC Studentships in Physics and Astronomy. University of Leicester
le.ac.uk
November 26, 2025 at 1:15 PM
🔭🧪🎢 PhD Project focus: AGN variability: hidden signals in the noise
We're advertising this project with Prof Simon Vaughan, analysing AGN with methods that go beyond traditional models and assumptions
For details of all our PhD projects look here: le.ac.uk/study/resear... 🔭🧪🎢
We're advertising this project with Prof Simon Vaughan, analysing AGN with methods that go beyond traditional models and assumptions
For details of all our PhD projects look here: le.ac.uk/study/resear... 🔭🧪🎢
Reposted by Mehdy Lefkir
Looking to start a PhD in Physics & Astronomy in 2026? The team @physicsuol.bsky.social have announced their STFC-funded projects on offer next year, spanning astrophysics, planetary science, and space instrumentation. Deadline: Jan 18th, contact us to learn more!
le.ac.uk/study/resear...
le.ac.uk/study/resear...
November 7, 2025 at 1:32 PM
Looking to start a PhD in Physics & Astronomy in 2026? The team @physicsuol.bsky.social have announced their STFC-funded projects on offer next year, spanning astrophysics, planetary science, and space instrumentation. Deadline: Jan 18th, contact us to learn more!
le.ac.uk/study/resear...
le.ac.uk/study/resear...
My second PhD paper has been accepted for publication! arxiv.org/abs/2510.14529
The variability of active galaxies: I. Broad-band noise X-ray power spectra from XMM-Newton and Swift
Accreting supermassive black holes at the centres of galaxies are the engine of active galactic nuclei (AGN). X-ray light curves of unabsorbed AGN show dramatic random variability on timescales rangin...
arxiv.org
October 29, 2025 at 12:04 PM
My second PhD paper has been accepted for publication! arxiv.org/abs/2510.14529
Reposted by Mehdy Lefkir
Interesting & slightly alarming to see these odd artefacts in PCA. Lots of PCA in astronomy too. Maybe important when data have 1/f noise? 🧪🔭 Here’s the preprint version of their paper: www.biorxiv.org/content/10.1...
December 5, 2023 at 11:18 PM
Interesting & slightly alarming to see these odd artefacts in PCA. Lots of PCA in astronomy too. Maybe important when data have 1/f noise? 🧪🔭 Here’s the preprint version of their paper: www.biorxiv.org/content/10.1...