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search_query=cat:astro-ph.*+AND+lastUpdatedDate:[202411192000+TO+202411252000]&start=0&max_results=5000
<h1>New astro-ph.* submissions cross listed on cs.AI, stat.*, cs.LG, physics.data-an staritng 202411192000 and ending 202411252000</h1>Feed last updated: 2024-11-24T00:00:00-05:00<a href="http://arxiv.org/pdf/2411.14748v1"><h2>Cosmological Analysis with Calibrated Neural Quantile Estimation and
search_query=cat:astro-ph.*+AND+lastUpdatedDate:[202411202000+TO+202411262000]&start=0&max_results=5000
<h1>New astro-ph.* submissions cross listed on stat.*, cs.AI, cs.LG, physics.data-an staritng 202411202000 and ending 202411262000</h1>Feed last updated: 2024-11-25T00:00:00-05:00<a href="http://arxiv.org/pdf/2411.16339v1"><h2>Solaris: A Foundation Model of the Sun</h2></a>Authors: Harris Abdul Majid, Pietro Sittoni, Francesco Tudisco</br>Comments: No comment found</br>Primary Category: astro-ph.SR</br>All Categories: astro-ph.SR, astro-ph.IM, cs.LG, physics.space-ph</br><p>Foundation models have demonstrated remarkable success across various
scientific domains, motivating our exploration of their potential in solar
physics. In this paper, we present Solaris, the first foundation model for
forecasting the Sun's atmosphere. We leverage 13 years of full-disk,
multi-wavelength solar imagery from the Solar Dynamics Observatory, spanning a
complete solar cycle, to pre-train Solaris for 12-hour interval forecasting.
Solaris is built on a large-scale 3D Swin Transformer architecture with 109
million parameters. We demonstrate Solaris' ability to generalize by
fine-tuning on a low-data regime using a single wavelength (1700 {\AA}), that
was not included in pre-training, outperforming models trained from scratch on
this specific wavelength. Our results indicate that Solaris can effectively
capture the complex dynamics of the solar atmosphere and transform solar
forecasting.</p></br><a href="http://arxiv.org/pdf/2411.14748v1"><h2>Cosmological Analysis with Calibrated Neural Quantile Estimation and
Approximate Simulators</h2></a>Authors: He Jia</br>Comments: 5+4 pages, 5+3 figures, to be submitted, comments are welcome</br>Primary Category: astro-ph.CO</br>All Categories: astro-ph.CO, astro-ph.IM, cs.LG</br><p>A major challenge in extracting information from current and upcoming surveys
of cosmological Large-Scale Structure (LSS) is the limited availability of
computationally expensive high-fidelity simulations. We introduce Neural
Expand Down Expand Up @@ -32,18 +44,24 @@ <h1>New astro-ph.* submissions cross listed on cs.AI, stat.*, cs.LG, physics.dat
response analysis of BabyIAXO's sensitivity to the axion-photon coupling.
Though focusing on the Primakoff solar flux component, our virtual helioscope
model can be used to test different production mechanisms, allowing for direct
comparisons within a unified framework.</p></br><a href="http://arxiv.org/pdf/2411.13402v1"><h2>Extraction of gravitational wave signals in realistic LISA data</h2></a>Authors: Eleonora Castelli, Quentin Baghi, John G. Baker, Jacob Slutsky, Jérôme Bobin, Nikolaos Karnesis, Antoine Petiteau, Orion Sauter, Peter Wass, William J. Weber</br>Comments: 28 pages, 14 figures</br>Primary Category: gr-qc</br>All Categories: gr-qc, astro-ph.IM, physics.data-an</br><p>The Laser Interferometer Space Antenna (LISA) mission is being developed by
ESA with NASA participation. As it has recently passed the Mission Adoption
milestone, models of the instruments and noise performance are becoming more
detailed, and likewise prototype data analyses must as well. Assumptions such
as Gaussianity, Stationarity, and continuous data continuity are unrealistic,
and must be replaced with physically motivated data simulations, and data
analysis methods adapted to accommodate such likely imperfections. To this end,
the LISA Data Challenges have produced datasets featuring time-varying and
unequal constellation armlength, and measurement artifacts including data
interruptions and instrumental transients. In this work, we assess the impact
of these data artifacts on the inference of Galactic Binary and Massive Black
Hole properties. Our analysis shows that the treatment of noise transients and
gaps is necessary for effective parameter estimation. We find that
straightforward mitigation techniques can significantly suppress artifacts,
albeit leaving a non-negligible impact on aspects of the science.</p></br>
comparisons within a unified framework.</p></br><a href="http://arxiv.org/pdf/2411.16556v1"><h2>Anomaly Detection and RFI Classification with Unsupervised Learning in
Narrowband Radio Technosignature Searches</h2></a>Authors: Ben Jacobson-Bell, Steve Croft, Carmen Choza, Alex Andersson, Daniel Bautista, Vishal Gajjar, Matthew Lebofsky, David H. E. MacMahon, Caleb Painter, Andrew P. V. Siemion</br>Comments: 20 pages, 14 figures, submitted to AJ</br>Primary Category: astro-ph.IM</br>All Categories: astro-ph.IM, cs.LG</br><p>The search for radio technosignatures is an anomaly detection problem:
candidate signals represent needles of interest in the proverbial haystack of
radio-frequency interference (RFI). Current search frameworks find an enormity
of false-positive signals, especially in large surveys, requiring manual
follow-up to a sometimes prohibitive degree. Unsupervised learning provides an
algorithmic way to winnow the most anomalous signals from the chaff, as well as
group together RFI signals that bear morphological similarities. We present
GLOBULAR (Grouping Low-frequency Observations By Unsupervised Learning After
Reduction) clustering, a signal processing method that uses HDBSCAN to reduce
the false-positive rate and isolate outlier signals for further analysis. When
combined with a standard narrowband signal detection and spatial filtering
pipeline, such as turboSETI, GLOBULAR clustering offers significant
improvements in the false-positive rate over the standard pipeline alone,
suggesting dramatic potential for the amelioration of manual follow-up
requirements for future large surveys. By removing RFI signals in regions of
high spectral occupancy, GLOBULAR clustering may also enable the detection of
signals missed by the standard pipeline. We benchmark our method against the
Choza et al. (2024) turboSETI-only search of 97 nearby galaxies at L-band,
demonstrating a false-positive hit reduction rate of 93.1% and a false-positive
event reduction rate of 99.3%.</p></br>

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