#radioastronomy — Public Fediverse posts

📡 MeerKAT has extracted the neutral hydrogen 21 cm signal from 4–5 billion light years away using radio data alone, with no optical galaxy survey to lean on. A Manchester / Univ. of the Western Cape team analysed ~96 hours of observations taken back in 2018. Hydrogen intensity mapping is becoming a practical cosmology tool — and a key method for SKAO. (1 Sep 2026)

#RadioAstronomy #Astronomy #Space
https://www.manchester.ac.uk/about/news/astronomers-use-meerkat-to-directly-detect-faint-hydrogen-signal-from-the-distant-universe

📡 For the first time the ITU-R EPFD regulatory framework has been applied directly to radio telescope measurements. All-sky interferometric data show unintended emission from satellite mega-constellations exceeding the radio astronomy interference threshold in 50–70% of samples — against a 2% tolerance. Margins are negative: −18.6 to −16.3 dB. Preprint, 2 Sep 2026.

https://arxiv.org/abs/2609.01995

#RadioAstronomy #Space #Science #Astronomy

📡 Images from the Radio Galaxy Zoo citizen science project were used to pretrain very small vision models (~6M parameters) with LeJEPA. A University of Geneva team shows that self-supervised learning directly on radio astronomy data matches far larger models at radio galaxy morphology classification — cheaper and more scalable. Preprint, 31 Aug 2026.

https://arxiv.org/abs/2608.30594

#RadioAstronomy #CitizenScience #DataScience #Astronomy

☀️ Solar radio astronomy, seen from Czechia: Dr Miroslav Bárta of the Solar Department at the Astronomical Institute of the Czech Academy of Sciences explains what ALMA in the Chilean Andes reveals about our nearest star, what Czech researchers focus on, and which upgrades will sharpen observations for other fields too. (In Czech.)

📅 4 Sep 2026
🔗 https://www.astro.cz/clanky/multimedia/hlubinami-vesmiru-s-dr-miroslavem-bartou-alma-a-nejblizsi-hvezda.html

#RadioAstronomy #Astronomy #Space #Science

📡 The MIDAS survey is the deepest MWA map so far — the GAMA9 and GAMA23 fields at 215.7 MHz. Over 2,100 deg² of sky, nearly 100 hours of observing and a catalogue of 133,826 radio components above 5σ. Mosaics, RMS maps, catalogues and the full imaging pipeline are all released publicly.

📅 1 Sep 2026
🔗 https://arxiv.org/abs/2609.01405

#RadioAstronomy #DataScience #OpenData #Astronomy

📻 Radio meteors, August 2026: Felix Verbelen's monthly report of reflections recorded at Kampenhout (BE) on the VVS beacon frequency of 49.99 MHz. The Perseids peaked on 13 Aug; 52 reflections lasting over a minute were logged across the month. Raw hourly counts are published as CSV, ready for your own analysis.

📅 4 Sep 2026
🔗 https://www.emeteornews.net/2026/09/04/radio-meteors-august-2026/

#RadioAstronomy #CitizenScience #DataScience #Science

📡 ESO has rolled out major upgrades to the ALMA Science Archive (25 Aug 2026). The query interface can now search spectral lines detected by ADMiT in public ALMA data — by molecule, transition, redshift or line intensity. Histograms show value distributions across the whole archive. ALMA data are public and free.

https://www.eso.org/sci/publications/announcements/sciann17801.html

#RadioAstronomy #DataScience #Astronomy #Science

📡 Antarctica's PANSY radar (Syowa Station) has released the first meteor head-echo orbit catalogue: 2 million meteors and 50 million pulse-resolved measurements from 26 Jan 2025 to 26 Jul 2026.

The survey reaches meteoroids of roughly 100 µm radius and the data already hint at a new shower candidate (peak at λ☉ = 110°). Paper and catalogue are free to download.

eMetN, 28 Aug 2026:
https://www.emeteornews.net/2026/08/28/news-from-the-meteor-library-continuous-antarctic-radar-observations-of-southern-meteoroid-streams/

#RadioAstronomy #DataScience #Astronomy

Backyard radio astronomy: writing in IEEE Spectrum, David Schneider shows how an RTL-SDR dongle, an LNA and a home-built horn antenna were enough to measure the Doppler shift of the 1420 MHz hydrogen line and plot the Milky Way's rotation curve — the key evidence for dark matter. His results match professional measurements.

📅 17 Aug 2026
🔗 https://www.rtl-sdr.com/detecting-dark-matters-mark-with-an-rtl-sdr-based-diy-radio-telescope/

#RadioAstronomy #CitizenScience #Astronomy #Science

The CARMELo network has published its July 2026 report. Eighteen amateur SDR receivers in Italy, Spain, the UK, Switzerland and the USA track meteor echoes off France's GRAVES radar (143.050 MHz). New this time: an in-house Python algorithm computing the Radio Zenithal Hourly Rate. A single receiver costs about €210 to build.

📅 24 Aug 2026
🔗 https://www.emeteornews.net/2026/08/24/july-2026-carmelo-report/

#RadioAstronomy #CitizenScience #Bolidozor #Astronomy #Space

Tonight I RFI hunted one potential location for my Discovery Dish Hydrogen Line Radio Telescope. RFI sweeps were performed with my HackRF, and Airspy on a dummy load and a 1420 MHz whip antenna purpose built to detect RFI.

jansky-observe dashboard proudly announced HI DETECTED 🧐 from a 50 Ω terminator? it was the receivers own spur at 1421.484 MHz

I learned about LO-shift spur discrimination today 🥳

#RadioAstronomy #Astrodon #HydrogenLine #SDR #OpenScience

RFI hunting around 1420MHz soon 📡

#radioastronomy #hydrogenline

Discovery Dish and Hydrogen Line Discovery Feed have arrived!

#discoverydish #hydrogenline #radioastronomy #openscience

Smallest Ever Odd Radio Circle Creates a New Mystery - YouTube
https://www.youtube.com/watch?v=wZcAT8hobo4

#Astronomy #RadioAstronomy #Cosmology

📡 Radio astronomy + open data: China's FAST telescope discovered the binary millisecond pulsar PSR J0435+3233 (3.2 ms spin, ~3,900 ly away), and archival data from NASA's Fermi gamma-ray telescope revealed gamma-ray pulsations from it too — a neat pairing of radio and gamma observations.
📅 17 Jul 2026
🔗 https://phys.org/news/2026-07-gamma-ray-pulsations-reveal-extreme.html
#RadioAstronomy #Astronomy #Science

📡💥 First-ever "magnetic fingerprint" of a gamma-ray burst! The VLA radio telescope (NRAO) detected polarized radio waves and Faraday rotation in the afterglow of GRB 260310A. The surrounding magnetic field is thousands of times stronger than our galaxy's — the burst exploded in an HII region around a massive star.
📅 Jul 14, 2026
🔗 https://public.nrao.edu/news/gamma-ray-burst-vla/
#RadioAstronomy #Astronomy #Science

📡 The VLASS radio survey is complete! NRAO's Very Large Array scanned 80% of the sky over three epochs, producing ~2 petabytes of open data – the most detailed radio map of the sky ever, matching optical surveys in resolution. It fuels hunts for supernovae, magnetic-field mapping and galaxy studies. (29 Jul 2026)

#RadioAstronomy #DataScience
https://www.universetoday.com/articles/radio-astronomy-is-getting-a-big-boost-from-the-vlas-new-sky-survey

📡 The amateur CARMELo network (Italy, Spain, UK, Switzerland) tracks meteors by radio: 17 SDR + Raspberry Pi receivers (~€210) listen for echoes off France's GRAVES radar. June data caught the daytime Arietids – homogeneous and open. A lovely example of citizen radio astronomy. (11 Jul 2026)

#RadioAstronomy #Bolidozor #CitizenScience #Robotics
https://www.emeteornews.net/2026/07/11/june-2026-carmelo-report/

Radio astronomy: the most sensitive search yet for technosignatures from exoplanet K2-18b. The VLA and MeerKAT radio telescopes watched the system for 33 days (a full planetary "year") across 544 MHz–9.8 GHz. No artificial signals were found, but the team demonstrated a faster method for future SETI surveys.
🔗 https://www.sciencedaily.com/releases/2026/07/260712011748.htm
#RadioAstronomy #Astronomy #Vesmir

Detecting Dark Matter from your backyard 🤩

https://news.ycombinator.com/item?id=49123579

#RadioAstronomy #OpenScience #CitizenScience #Astronomy

📡 Open radio-telescope data: "FAST Pulsar Database III" (July 2026) delivers snapshots of nulling, mode-changing and subpulse modulation for 374 pulsars observed by China's FAST telescope. A valuable public catalogue for studying how neutron stars produce radio emission.

(July 2026)
https://arxiv.org/abs/2607.03047

#RadioAstronomy #DataScience #Astronomy

Here is a screenshot of jansky-observe running with a synthetic source, I can't wait to start recording some actual data!

Real sky when the parts land.

#RadioAstronomy #Astrodon #Python

Hi 👋

I'm Joe, a software engineer in Philadelphia teaching myself radio astronomy.

I'm building open-source Python tools as I learn: a course, a framework for reproducible research on public archives, and control software for a Discovery Dish station I'm still assembling. No first light yet.

Mostly here to learn from people who actually do this. Expect hydrogen line observing, public archives, and honest null results.

#introduction #radioastronomy #astronomy #Astrodon #python #opensource

The universe's missing ordinary matter—unaccounted for in the mass of current stars and galaxies—exists in highly diffuse clouds or "puffs" of gas that extend up to four million light-years around galaxy groups.
#Astrophysics #Cosmology #RadioAstronomy #sflorg
https://www.sflorg.com/2026/07/asph07212601.html

A group of us visited the Dwingeloo radiotelescope on Sunday. I've often cycled down there to ride over the heath or sit near the radio telescope and eat my lunch, but not been on a guided tour before. I recommend it. You can currently book a tour on Sundays and Wednesdays in July and August.

Real discoveries were made here. This was once the largest radiotelescope in the world, a title which of course it has not held for many years.

But the telescope can now do more than it could in the 1950s and 60s because its capability is enhanced by modern software. This made it possible for the wonderful enthusiastic amateurs who now run the telescope to demonstrate things to us within five minutes which once took months for a group of scientists to work out.

More information here:
https://www.camras.nl/
https://en.wikipedia.org/wiki/Dwingeloo_Radio_Observatory

@radiotelescoop
#camras #dwingeloo #dwingelooradiotelescoop #radioastronomy #drenthe

Astronomers have generated the highest-resolution maps to date of neutral atomic hydrogen in the Orion Nebula, revealing previously unseen structures, such as giant expanding shells and cavities.
#Astrophysics #RadioAstronomy #sflorg
https://www.sflorg.com/2026/07/asph07092601.html

📡 Radio meteors – June 2026: an observer in Kampenhout (BE) published a survey of reflections on the VVS 49.99 MHz beacon. The daytime Arietids and ζ Perseids dominated; 9 echoes lasted over a minute this month. Raw data are freely downloadable as CSV. Citizen radio astronomy in action.

🔗 Source (3 Jul 2026): https://www.emeteornews.net/2026/07/03/radio-meteors-june-2026/

#RadioAstronomy #Bolidozor #CitizenScience

📡 New open catalogue from Europe's LOFAR radio telescope: the LoTSS-DR3 survey searched 3,822 galaxy clusters and used an automated (ML) pipeline to detect diffuse radio emission in the intracluster medium — the largest such sample yet. Data & detection pipeline openly available. (Jun 2026)

🔗 https://www.aanda.org/articles/aa/full_html/2026/06/aa59444-26/aa59444-26.html

#RadioAstronomy #DataScience #Astronomy #Science

A radio image of a jet from a quasar in the galaxy Virgo A, as observed by Japan's Very Long Baseline Interferometry space observatory.

#space #science #radioastronomy #astronomy