#esaeuclid — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #esaeuclid, aggregated by home.social.
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The two papers can be read as open access publications without paywall:
Discovery paper: Yang et al., 2026, A&A, 711, 104 (https://www.aanda.org/10.1051/0004-6361/202658883)
First follow-up analysis: Belladitta et al., accepted for publication in A&A (https://doi.org/10.1051/0004-6361/202659319)
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The two papers can be read as open access publications without paywall:
Discovery paper: Yang et al., 2026, A&A, 711, 104 (https://www.aanda.org/10.1051/0004-6361/202658883)
First follow-up analysis: Belladitta et al., accepted for publication in A&A (https://doi.org/10.1051/0004-6361/202659319)
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With this first collection, #Euclid starts dominating the search for early Universe #quasars. This is no wonder: Euclid's wide survey provides unprecedented sensitivity at wavelengths into the near-infrared, which are key to identifying these rare accreting early black holes.
Forecasts predict that in Euclid data even earlier quasars should be found: likely beyond z=8 (650 million years after the Big Bang) and possibly even z=9 (550 million years).
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With this first collection, #Euclid starts dominating the search for early Universe #quasars. This is no wonder: Euclid's wide survey provides unprecedented sensitivity at wavelengths into the near-infrared, which are key to identifying these rare accreting early black holes.
Forecasts predict that in Euclid data even earlier quasars should be found: likely beyond z=8 (650 million years after the Big Bang) and possibly even z=9 (550 million years).
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#Euclid scientists identified 31 new early Universe quasars, including the two most distant quasars currently known. The new record holder's redshift z=7.77 places it only 670 million years after the Big Bang.
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#Euclid scientists identified 31 new early Universe quasars, including the two most distant quasars currently known. The new record holder's redshift z=7.77 places it only 670 million years after the Big Bang.
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If you are in the London/UK area right now, #Euclid has an interactive exhibition at the #RoyalSociety #SummerScience exhibition. Open until Sunday 5 July. See you there!
https://royalsociety.org/science-events-and-lectures/summer-science-exhibition/
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If you are in the London/UK area right now, #Euclid has an interactive exhibition at the #RoyalSociety #SummerScience exhibition. Open until Sunday 5 July. See you there!
https://royalsociety.org/science-events-and-lectures/summer-science-exhibition/
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Time flies, doesn't it? #ESAEuclid launched three years ago today. 🎉 🚀 🛰️
For the second anniversary last year we revisited launch day:
https://www.euclid-ec.org/second-anniversary-of-euclid-in-space/
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Time flies, doesn't it? #ESAEuclid launched three years ago today. 🎉 🚀 🛰️
For the second anniversary last year we revisited launch day:
https://www.euclid-ec.org/second-anniversary-of-euclid-in-space/
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A year ago, #Euclid's first small data release 'Q1' provided data for 63 deg² of sky to the world. Now an 'Astronomy & Astrophysics Special Issue' has been published with 41 articles about and around this release:
https://www.euclid-ec.org/q1-special-issue-aa/
Many of these articles were made public as preprints at the time of the Q1 release, but since then we added about a dozen extra, and they are now all peer reviewed. Open access, open science.
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A year ago, #Euclid's first small data release 'Q1' provided data for 63 deg² of sky to the world. Now an 'Astronomy & Astrophysics Special Issue' has been published with 41 articles about and around this release:
https://www.euclid-ec.org/q1-special-issue-aa/
Many of these articles were made public as preprints at the time of the Q1 release, but since then we added about a dozen extra, and they are now all peer reviewed. Open access, open science.
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Last week, we announced that ESA and the Euclid Consortium released a massive image of the Milky Way's heart. This 'Q2' data release contains images of 60 million stars. A great primer on this image comes from the EC's Chris Pattison:
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Last week, we announced that ESA and the Euclid Consortium released a massive image of the Milky Way's heart. This 'Q2' data release contains images of 60 million stars. A great primer on this image comes from the EC's Chris Pattison:
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Euclid Stares at the Galactic Bulge
Time for another update from ESA’S Euclid Space Mission: today is Q2 Day!
The largest and most detailed photo ever made of the Galactic Centre in visible light was taken by the Euclid mission. For just one day (23rd March 2025), Euclid turned its gaze towards the extremely bright inner region of our Milky Way galaxy, known as the galactic bulge. The extraordinary picture that resulted is not part of Euclid’s main cosmological survey, which is designed to look at objects far outside our own Galaxy, but was made in response to a special request from astronomers who were after what Euclid does best: capturing large areas of the sky in crisp detail. Packed with more than 60 million stars, this image opens the door for scientists to confirm the existence of any exoplanet found in this region and measure its mass using tiny changes in starlight over time. The observational data obtained in this project were released today as Euclid’s Q2 data release; for details of Q1 please see here.
Designed to observe billions of faraway galaxies, the space telescope’s visible light camera is sensitive enough to tell apart individual stars in our super-crowded galactic bulge, without being blinded. This ability is crucial for what scientists want to use this image for: studying planets around other stars using a special technique called gravitational microlensing.
For comparison, Euclid’s sharpness and sensitivity in visible light is similar to the NASA/ESA Hubble Space Telescope’s wide field camera. But each pointing that Euclid captures in a few hours spans an area 270 times larger than Hubble’s field of view. To observe the same Euclid mosaic, the Keck Observatory would need around 2000 hours. Euclid is faster, and able to capture details from fainter stars that would be otherwise missed when observing from the ground. This single mosaic also encompasses the entire region that the upcoming Roman space telescope will monitor for planet hunting.
You can learn more about this by visiting the official account of this on the ESA website and/or watching this video:
https://www.youtube.com/watch?v=2DtFRq1cgcc
#ESAEuclid #Euclid #exoplanets #GalacticBulge #GalacticCentre #gravitationalMicrolensing #MilkyWay -
Euclid Stares at the Galactic Bulge
Time for another update from ESA’S Euclid Space Mission: the largest and most detailed photo ever made of our Galactic centre in visible light was taken by the Euclid mission. For just one day (23rd March 2025), Euclid turned its gaze towards the extremely bright inner region of our Milky Way galaxy, known as the galactic bulge. This extraordinary picture is not part of the Euclid’s main cosmological survey, which is designed to look at objects far outside our own Galaxy, but was made in response to a special request from astronomers who were after what Euclid does best: capturing large areas of the sky in crisp detail. Packed with more than 60 million stars, this image opens the door for scientists to confirm the existence of any exoplanet found in this region and measure its mass using tiny changes in starlight over time.
Designed to observe billions of faraway galaxies, the space telescope’s visible light camera is sensitive enough to tell apart individual stars in our super-crowded galactic bulge, without being blinded. This ability is crucial for what scientists want to use this image for: studying planets around other stars using a special technique called gravitational microlensing.
For comparison, Euclid’s sharpness and sensitivity in visible light is similar to the NASA/ESA Hubble Space Telescope’s wide field camera. But each pointing that Euclid captures in a few hours spans an area 270 times larger than Hubble’s field of view. To observe the same Euclid mosaic, the Keck Observatory would need around 2000 hours. Euclid is faster, and able to capture details from fainter stars that would be otherwise missed when observing from the ground. This single mosaic also encompasses the entire region that the upcoming Roman space telescope will monitor for planet hunting.
You can learn more about this by visiting the official account of this on the ESA website and/or watching this video:
https://www.youtube.com/watch?v=2DtFRq1cgcc
#ESAEuclid #Euclid #exoplanets #GalacticBulge #GalacticCentre #gravitationalMicrolensing #MilkyWay -
Euclid Update – Revised Timeline
In a post last week I hinted that I hoped soon to be able to provide an update on progress with the European Space Agency’s Euclid Mission. People within the Euclid Consortium have known for some time, but it has now been officially announced by ESA, that the timeline for the first full Data Release (DR1; originally scheduled for October 2026) has now been revised.
The plan now is for DR1 to happen in stages, with a first tranche to occur in November 2026 (precise date yet to be announced). The complete data release will take place in mid-2027 (probably in June). The sky area covered by DR1 will be about covering a large sky area of about 1900 deg².
To give a little more background, the data products from the Euclid survey are divided into three levels of data processing function:
- LE1 – the “raw” data frames, prior to calibration, generated at the Science Operations Centre from the time-ordered data and telemetry received from the spacecraft
- LE2 – the calibrated and corrected data for the two instruments (VIS and NISP) – images, spectra, catalogues of point sources, etc
- LE3 – the high-level data products (galaxy catalogues, cosmic shear maps, etc) designed for cosmological analysis
The first release will comprise LE1 and LE2 only. This will be called DR-Foundation. The LE3 data will be added next year to make the full DR1. Since LE3 is required for the cosmological analysis that is the prime motivation for the Euclid mission, it follows that there will be no official cosmology results from Euclid DR1 until mid-2027 at the earliest. Other results based on “Foundation” data may of course emerge before then.
I hope this clarifies the situation.
P.S. Irish physicists and astronomers will be particularly interested to know that the LE1 data includes information about the spacecraft and instrument pointing orientations, which is stored in the form of quaternions…
#ESAEuclid #ESAC #EuclidDr1 #EuclidDR1Foundation #EuropeanSpaceAgency #LE1 #LE2 #LE3 #Quaternions -
Euclid Update – Revised Timeline
In a post last week I hinted that I hoped soon to be able to provide an update on progress with the European Space Agency’s Euclid Mission. People within the Euclid Consortium have known for some time, but it has now been officially announced by ESA, that the timeline for the first full Data Release (DR1; originally scheduled for October 2026) has now been revised.
The plan now is for DR1 to happen in stages, with a first tranche to occur in November 2026 (precise date yet to be announced). The complete data release will take place in mid-2027 (probably in June). The sky area covered by DR1 will be about covering a large sky area of about 1900 deg².
To give a little more background, the data products from the Euclid survey are divided into three levels of data processing function:
- LE1 – the “raw” data frames, prior to calibration, generated at the Science Operations Centre from the time-ordered data and telemetry received from the spacecraft
- LE2 – the calibrated and corrected data for the two instruments (VIS and NISP) – images, spectra, catalogues of point sources, etc
- LE3 – the high-level data products (galaxy catalogues, cosmic shear maps, etc) designed for cosmological analysis
The first release will comprise LE1 and LE2 only. This will be called DR-Foundation. The LE3 data will be added next year to make the full DR1. Since LE3 is required for the cosmological analysis that is the prime motivation for the Euclid mission, it follows that there will be no official cosmology results from Euclid DR1 until mid-2027 at the earliest. Other results based on “Foundation” data may of course emerge before then.
I hope this clarifies the situation.
P.S. Irish physicists and astronomers will be particularly interested to know that the LE1 data includes information about the spacecraft and instrument pointing orientations, which is stored in the form of quaternions…
#ESAEuclid #ESAC #EuclidDr1 #EuclidDR1Foundation #EuropeanSpaceAgency #LE1 #LE2 #LE3 #Quaternions -
Euclid Update – Revised Timeline
In a post last week I hinted that I hoped soon to be able to provide an update on progress with the European Space Agency’s Euclid Mission. People within the Euclid Consortium have known for some time, but it has now been officially announced by ESA, that the timeline for the first full Data Release (DR1; originally scheduled for October 2026) has now been revised.
The plan now is for DR1 to happen in stages, with a first tranche to occur in November 2026 (precise date yet to be announced). The complete data release will take place in mid-2027 (probably in June). The sky area covered by DR1 will be about covering a large sky area of about 1900 deg².
To give a little more background, the data products from the Euclid survey are divided into three levels of data processing function:
- LE1 – the “raw” data frames, prior to calibration, generated at the Science Operations Centre from the time-ordered data and telemetry received from the spacecraft
- LE2 – the calibrated and corrected data for the two instruments (VIS and NISP) – images, spectra, catalogues of point sources, etc
- LE3 – the high-level data products (galaxy catalogues, cosmic shear maps, etc) designed for cosmological analysis
The first release will comprise LE1 and LE2 only. This will be called DR-Foundation. The LE3 data will be added next year to make the full DR1. Since LE3 is required for the cosmological analysis that is the prime motivation for the Euclid mission, it follows that there will be no official cosmology results from Euclid DR1 until mid-2027 at the earliest. Other results based on “Foundation” data may of course emerge before then.
I hope this clarifies the situation.
P.S. Irish physicists and astronomers will be particularly interested to know that the LE1 data includes information about the spacecraft and instrument pointing orientations, which is stored in the form of quaternions…
#ESAEuclid #ESAC #EuclidDr1 #EuclidDR1Foundation #EuropeanSpaceAgency #LE1 #LE2 #LE3 #Quaternions -
Euclid Update – Revised Timeline
In a post last week I hinted that I hoped soon to be able to provide an update on progress with the European Space Agency’s Euclid Mission. People within the Euclid Consortium have known for some time, but it has now been officially announced by ESA, that the timeline for the first full Data Release (DR1; originally scheduled for October 2026) has now been revised.
The plan now is for DR1 to happen in stages, with a first tranche to occur in November 2026 (precise date yet to be announced). The complete data release will take place in mid-2027 (probably in June). The sky area covered by DR1 will be about covering a large sky area of about 1900 deg².
To give a little more background, the data products from the Euclid survey are divided into three levels of data processing function:
- LE1 – the “raw” data frames, prior to calibration, generated at the Science Operations Centre from the time-ordered data and telemetry received from the spacecraft
- LE2 – the calibrated and corrected data for the two instruments (VIS and NISP) – images, spectra, catalogues of point sources, etc
- LE3 – the high-level data products (galaxy catalogues, cosmic shear maps, etc) designed for cosmological analysis
The first release will comprise LE1 and LE2 only. This will be called DR-Foundation. The LE3 data will be added next year to make the full DR1. Since LE3 is required for the cosmological analysis that is the prime motivation for the Euclid mission, it follows that there will be no official cosmology results from Euclid DR1 until mid-2027 at the earliest. Other results based on “Foundation” data may of course emerge before then.
I hope this clarifies the situation.
P.S. Irish physicists and astronomers will be particularly interested to know that the LE1 data includes information about the spacecraft and instrument pointing orientations, which is stored in the form of quaternions…
#ESAEuclid #ESAC #EuclidDr1 #EuclidDR1Foundation #EuropeanSpaceAgency #LE1 #LE2 #LE3 #Quaternions -
Euclid Update – Revised Timeline
In a post last week I hinted that I hoped soon to be able to provide an update on progress with the European Space Agency’s Euclid Mission. People within the Euclid Consortium have known for some time, but it has now been officially announced by ESA, that the timeline for the first full Data Release (DR1; originally scheduled for October 2026) has now been revised.
The plan now is for DR1 to happen in stages, with a first tranche to occur in November 2026 (precise date yet to be announced). The complete data release will take place in mid-2027 (probably in June). The sky area covered by DR1 will be about covering a large sky area of about 1900 deg².
To give a little more background, the data products from the Euclid survey are divided into three levels of data processing function:
- LE1 – the “raw” data frames, prior to calibration, generated at the Science Operations Centre from the time-ordered data and telemetry received from the spacecraft
- LE2 – the calibrated and corrected data for the two instruments (VIS and NISP) – images, spectra, catalogues of point sources, etc
- LE3 – the high-level data products (galaxy catalogues, cosmic shear maps, etc) designed for cosmological analysis
The first release will comprise LE1 and LE2 only. This will be called DR-Foundation. The LE3 data will be added next year to make the full DR1. Since LE3 is required for the cosmological analysis that is the prime motivation for the Euclid mission, it follows that there will be no official cosmology results from Euclid DR1 until mid-2027 at the earliest. Other results based on “Foundation” data may of course emerge before then.
I hope this clarifies the situation.
P.S. Irish physicists and astronomers will be particularly interested to know that the LE1 data includes information about the spacecraft and instrument pointing orientations, which is stored in the form of quaternions…
#ESAEuclid #ESAC #EuclidDr1 #EuclidDR1Foundation #EuropeanSpaceAgency #LE1 #LE2 #LE3 #Quaternions -
Data from #ESAEuclid uncovered physics deep inside red dwarf stars. Scientists found a 'brightness gap' in #stars of a globular cluster, pointing to structural instability at certain masses.
While #ESA's #Gaia mission had found this process in relatively nearby stars, scientists from @stsci.edu for the first time showed this for a very old globular cluster, observed by #Euclid.
Read the full press release here:
https://www.stsci.edu/contents/news-releases/2026/news-2026-405#section-id-2
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Data from #ESAEuclid uncovered physics deep inside red dwarf stars. Scientists found a 'brightness gap' in #stars of a globular cluster, pointing to structural instability at certain masses.
While #ESA's #Gaia mission had found this process in relatively nearby stars, scientists from @stsci.edu for the first time showed this for a very old globular cluster, observed by #Euclid.
Read the full press release here:
https://www.stsci.edu/contents/news-releases/2026/news-2026-405#section-id-2
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Those were beautiful #aurorae in the past days. A solar storm brought a lot of protons to Earth. Not only to Earth but also to #ESAEuclid – but does #Euclid notice? Oh yes.
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Those were beautiful #aurorae in the past days. A solar storm brought a lot of protons to Earth. Not only to Earth but also to #ESAEuclid – but does #Euclid notice? Oh yes.
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Those were beautiful #aurorae in the past days. A solar storm brought a lot of protons to Earth. Not only to Earth but also to #ESAEuclid – but does #Euclid notice? Oh yes.
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Those were beautiful #aurorae in the past days. A solar storm brought a lot of protons to Earth. Not only to Earth but also to #ESAEuclid – but does #Euclid notice? Oh yes.
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Those were beautiful #aurorae in the past days. A solar storm brought a lot of protons to Earth. Not only to Earth but also to #ESAEuclid – but does #Euclid notice? Oh yes.
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There is an extraordinarily long #SolarFlare still taking place for almost the past full day. This graphic shows the #proton flux, the highest in the current #SolarCycle, and this is definitely also the longest flare.
For #ESAEuclid this means that we won't be able to use these data, as every one of these protons will leave a trace on our CCD detectors and that's just too many. So a day of data lost 😞
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There is an extraordinarily long #SolarFlare still taking place for almost the past full day. This graphic shows the #proton flux, the highest in the current #SolarCycle, and this is definitely also the longest flare.
For #ESAEuclid this means that we won't be able to use these data, as every one of these protons will leave a trace on our CCD detectors and that's just too many. So a day of data lost 😞
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In our second blogpost we give an intro into the three #ESAEuclid instrument reference papers. They will also function as a reference for the next years: What can the #VIS and #NISP instruments do (and what can they not do), what was the design background and the underlying requirements? And how do we calibrate these data?
Here's our intro:
https://www.euclid-ec.org/euclid-reference-publications-instruments/
#Euclid #space #astronomy #cosmology #astrodon #science #ESA
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In our second blogpost we give an intro into the three #ESAEuclid instrument reference papers. They will also function as a reference for the next years: What can the #VIS and #NISP instruments do (and what can they not do), what was the design background and the underlying requirements? And how do we calibrate these data?
Here's our intro:
https://www.euclid-ec.org/euclid-reference-publications-instruments/
#Euclid #space #astronomy #cosmology #astrodon #science #ESA
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In our second blogpost we give an intro into the three #ESAEuclid instrument reference papers. They will also function as a reference for the next years: What can the #VIS and #NISP instruments do (and what can they not do), what was the design background and the underlying requirements? And how do we calibrate these data?
Here's our intro:
https://www.euclid-ec.org/euclid-reference-publications-instruments/
#Euclid #space #astronomy #cosmology #astrodon #science #ESA
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In our second blogpost we give an intro into the three #ESAEuclid instrument reference papers. They will also function as a reference for the next years: What can the #VIS and #NISP instruments do (and what can they not do), what was the design background and the underlying requirements? And how do we calibrate these data?
Here's our intro:
https://www.euclid-ec.org/euclid-reference-publications-instruments/
#Euclid #space #astronomy #cosmology #astrodon #science #ESA
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Another of our papers in the #ESAEuclid / @ec_euclid overview series of 5, supplementing the #NISP paper above, was already accepted last week:
https://ui.adsabs.harvard.edu/abs/2024arXiv240513494E/abstract
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Another of our papers in the #ESAEuclid / @ec_euclid overview series of 5, supplementing the #NISP paper above, was already accepted last week:
https://ui.adsabs.harvard.edu/abs/2024arXiv240513494E/abstract
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Another of our papers in the #ESAEuclid / @ec_euclid overview series of 5, supplementing the #NISP paper above, was already accepted last week:
https://ui.adsabs.harvard.edu/abs/2024arXiv240513494E/abstract
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Another of our papers in the #ESAEuclid / @ec_euclid overview series of 5, supplementing the #NISP paper above, was already accepted last week:
https://ui.adsabs.harvard.edu/abs/2024arXiv240513494E/abstract
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Another of our papers in the #ESAEuclid / @ec_euclid overview series of 5, supplementing the #NISP paper above, was already accepted last week:
https://ui.adsabs.harvard.edu/abs/2024arXiv240513494E/abstract
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Aaaaaaand #paper accepted. Now *that* was quick. Thank you, editor!
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Aaaaaaand #paper accepted. Now *that* was quick. Thank you, editor!
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Aaaaaaand #paper accepted. Now *that* was quick. Thank you, editor!
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Aaaaaaand #paper accepted. Now *that* was quick. Thank you, editor!
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Aaaaaaand #paper accepted. Now *that* was quick. Thank you, editor!
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Aaaand two days later, after a very worthy meeting on #ESAEuclid at #ESAC I'm now starting my way back home.
Zeroth leg: chartered bus to #Madrid (30min), then a few stations #Metro. I did bring a Metro travel card from 2019 and found 6 more trips on it...
Walk to #Atocha and now boarded a quite packed #Ouigo to #Barcelona.
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