this time on sampling methods for the CMB power spectrum estimation has been just published in Physical Review D. The “official” journal version can be found here, while the matching, open-access, archive version is available from this link. …
Category: Science
Hamza’s paper is out !
Two B3DCMB papers accepted !
Two most recent papers, led by B3DCMB students, have been accepted for publication. The map-making paper by Hamza and collaborators, presents the MAPPRAISER software which implements state-of-the-art map-making methods based on novel, B3DCMB developed numerical solvers. The manuscript will be …
Map-making hands-on courses by Hamza
Though Hamza formally left the project in early November and relocated to sunny California, where he is now a postdoctoral researcher working at Lawrence Berkeley National Laboratory, he is still very much involved in the project’s work. Starting on Jan …
5th year kicked-off !
The 5th year kick-off of the project took place on Dec 14. On zoom again ! This did not however affect the scientific content of the meeting, though we missed on a free lunch, yet again !
This was amply …
Map-making paper and software are out !
Hamza’s map-making paper is finally out ! Check it out on arXiv. The work led by Hamza is a result of a truly collaborative and multi-disciplinary effort. For us in the trenches this showcases the added value and usefulness of …
“Amended Gibbs samplers for for Cosmic Microwave Background power spectrum estimation” …
A new paper by Gabriel and co (including Nicolas, Josquin and Radek) just hit the shelves or at least on-line archive …
Please check here for more details … …
B3DCMB hosts an intern
Paule, an undergaduate student from TELECOM Paris, has joined the B3DCMB project for a four week long internship project. She is performing it at INRIA under the tutelage of Laura but spends significant part of her time at APC working …
Paper presenting a new framework for data analysis just published !
A paper by Clara and company titled “Framework for analysis of next generation, polarized CMB data sets in the presence of Galactic foregrounds and systematic effects” has been just published in Physical Review D. The paper presents a …
A Julia crash-course !
A first installment of a crash, kick-off course in Julia, for (mostly) accomplished Python programmers stimulated by the B3DCMB project was held on March 11. The course is geared up towards the B3DCMB students and collaborators from APC and elsewhere …
Clara gets her (scientific) spurs and a paper !
Clara Vergès – a graduate student associated with the B3DCMB project was awarded a title of a doctor of the newly created Université de Paris defending her …
New paper on accelerated solvers for CMB
Recently, Jan, Laura, and Radek submitted a paper proposing new techniques for solving a sequence of linear algebraic systems arising in time-domain component separation. The approach we have proposed combines: 1) two-level preconditioner where the second level is built progressively …
‘B-modes from space’, 2019 edition …
We have had notable presence during the bi-annual, ‘B-modes from space’ workshop which has taken place in Munich this time. Clara, Clément, Hamza and Josquin went there to check the state-of-play in …
Search for a postdoctoral researcher continues !!!
We continue looking for a postdoctoral researcher who will work at the APC Laboratory on CMB data analysis and in particular on component separation techniques. The post is now officially advertised on the National Center for Scientific Research website.…
Lecture on HPC in cosmology for SUPELEC undergrads !
Om May 6, Radek gave a lecture on computational challenges in astrophysics and cosmology to the first year undergraduate students at CenteraleSupelec with a major in physics and nano-technologies to kick-off a course on statistics and machine learning for cosmology …
Laura gives plenary talk at SIAM Computational Science and Engineering conference
While this may not be the hottest news as the meeting took place in Spokane, WA, US in February, but the talk and the viewgraphs are finally on-line !
Check them out !
You may also want to see Jan’s …
Results of the B3DCMB project during SIAM CSE19
Some of our results and ideas concerning preconditioners and linear solvers were recently presented during SIAM Conference on Computational Science and Engineering in Spokane. Within the minisyposium organized by the NLAFET consortium (that includes a part of Laura Grigori’s team), …
A talk featuring results of the B3DCMB project
Some of the results and contributions of the B3DCMB project including a brief overview of the MIDAPACK library were featured in an invited talk given by R. Stompor on “Computational challenges of the cosmic microwave background data analysis” …
and papers, papers, …
The paper by Giuseppe on “Iterative map-making with two-level preconditioning for polarized cosmic microwave background data sets. A worked example for ground-based experiments” (see Davide’s post here) has been just published (Puglisi et al, 2018, Astronomy & Astrophysics, …
meetings, meetings, and more meetings …
Next week members of the B3DCMB project get (nearly) evenly split between:
Masterclass in Bayesian Statistics co-organized by our very own Nicolas Chopin at CIRM in Marseille; Hamza and Nicolas will be there !
and
Cosmo lectures at LAL
Our collaborators at LAL (Sophie Henrot-Versille and Matt Tristram) are organizing a series of lectures on the physics of the cosmic microwave background. From an email from Sophie:
Dear all On the 15th, 16th and 17th of october, Eiichiro Komatsu,…
New paper on linear solvers for the CMB data analysis
CMB data analysis commonly involves solution of large systems of equations. Finding appropriate solvers for these systems is a subject of ongoing research and one of the aims of B3DCMB project. The fact that, in general, the system matrix cannot …
One more step towards getting CMB maps in fewer steps
Cosmic microwave background (CMB) experiments chase faint signals from the primordial universe by continuously scanning the sky for years. Their cameras are typically read out hundreds of times per second, delivering the so-called time ordered data, which are nothing but …