@lab_artemis

L'UMR 7250 (CNRS-OCA-UCA) réunit des spécialistes des lasers et du traitement du signal au service de l'astrophysique des ondes gravitationnelles.

 Observatoire de la Cote d'Azur
artemis.oca.eu/fr/accueil-artemis
Joined November 2021
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  • Following62
  • Followers230
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** STEPHEN HAWKING WAS RIGHT ** Using a very strong black-hole merger signal, the @LIGO-@ego_virgo-@KAGRA_PR Collaboration has shown the 2nd law of black hole mechanics, Hawking's area law (A_final > A_initial), to hold with high credibility. PRL: go.aps.org/3VarXHA #open
Artist's concept of the inspiral, merger, and ringdown of a pair of black holes and resulting gravitational wave signal.

ALT Artist's concept of the inspiral, merger, and ringdown of a pair of black holes and resulting gravitational wave signal.

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UMR Artemis retweeted
LIGO@LIGO26 Aug 2025
Results from the first part of our fourth LIGO @ego_virgo @KAGRA_PR observing run are out today! We're pleased to share the largest catalog of gravitational-wave observations with more discoveries of black holes and neutron stars 📰 arxiv.org/abs/2508.18082 #O4IsHere #GWTC4
New masses in the stellar graveyard plot, showing astronomical observations of black holes and neutron stars. The number of gravitational-wave observations of black holes is overwhelming. The plot is arranged to look nice, the horizontal axis has no meaning, but the vertical one shows masses. We have a significant range of masses from about 1 solar mass to over 200 solar masses for our largest merger remnant. New out today is a neutron star black hole binary GW230518_125908, as well as a lot of binary black holes.

ALT New masses in the stellar graveyard plot, showing astronomical observations of black holes and neutron stars. The number of gravitational-wave observations of black holes is overwhelming. The plot is arranged to look nice, the horizontal axis has no meaning, but the vertical one shows masses. We have a significant range of masses from about 1 solar mass to over 200 solar masses for our largest merger remnant. New out today is a neutron star black hole binary GW230518_125908, as well as a lot of binary black holes.

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Exciting #GravitationalWave candidate from yesterday #S250114ax If real, the source is probably a binary black hole False alarm rate 1 in 7.7×10^18 yr GraceDB gracedb.ligo.org/superevents… GCN gcn.nasa.gov/circulars/38932 Rating 🖤🪿🤝 #O4IsHere
Initial sky localization. 90% area 37 sq deg.

ALT Initial sky localization. 90% area 37 sq deg.

Initial three-dimensional volume localization. Distance around 470 Mpc.

ALT Initial three-dimensional volume localization. Distance around 470 Mpc.

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Je finis avec une pensée de mon cher Hubert Reeves "L'homme mène un combat contre la nature, s'il le gagne, il est perdu". Menons donc un combat pour les faits... et ailleurs. Ce compte fermera le 20 janvier. Merci tout le monde
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[MÉDAILLES D’HONNEUR] Mardi 19 novembre, Sylvain Di Giorgio, délégué régional de @CNRS Délégation Côte d’Azur, remettait les médailles d’honneur au personnel parti à la retraite ces dernières années, aux côtés des représentants des 18 laboratoires.
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UMR Artemis retweeted
OCA@ObsCoteAzur30 Oct 2024
🔁𝗥𝗲𝗱𝗶𝗳𝗳𝘂𝘀𝗶𝗼𝗻 𝗱𝗲 𝗹𝗮 𝗰𝗼𝗻𝗳𝗲́𝗿𝗲𝗻𝗰𝗲 "𝗘𝘅𝗽𝗹𝗼𝗿𝗮𝘁𝗶𝗼𝗻 𝗱𝗲𝘀 𝗺𝘆𝘀𝘁𝗲̀𝗿𝗲𝘀 𝗱𝗲 𝗹'𝗨𝗻𝗶𝘃𝗲𝗿𝘀 " 𝗽𝗮𝗿 𝗠𝗮𝗶𝗿𝗶 𝗦𝗮𝗸𝗲𝗹𝗹𝗶𝗮𝗿𝗮𝗱𝗼𝘂, @KingsCollegeLon (@lab_artemis) @VilledeNice @GiaumeJM 🔗youtu.be/BgLBOkgiAdw
https://youtu.be/BgLBOkgiAdw

ALT https://youtu.be/BgLBOkgiAdw

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Artemis researcher contributed to the search for a GW signal emitted by #SN2023ixf in the @LIGO @ego_virgo @KAGRA_PR data. See arxiv.org/abs/2410.16565
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It’s several folks from @ObsCoteAzur at the GdR for #GravitationalWaves talking about some of the cool science being done at @lab_artemis and in the LVK! It was great to mingle and chat science with the GW community in France 🇫🇷 @ego_virgo @LIGO @KAGRA_PR
Image of Shanika presenting.

ALT Image of Shanika presenting.

Image of Hugo presenting.

ALT Image of Hugo presenting.

Image of Jishnu presenting.

ALT Image of Jishnu presenting.

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Congratulations to @OMinazzoli who succesfully defended his Habilitation last week at the @ObsCoteAzur
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Here are some folks from @ObsCoteAzur @lab_artemis with their posters at the LVK meeting this week! 🤩 Some cool science by Hugo Einsle and Marco Rivera (@MIBRivera) @ego_virgo @LIGO @KAGRA_PR #GravitationalWaves
Hugo with his poster

ALT Hugo with his poster

Marco with his poster

ALT Marco with his poster

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On september 20th, Marco @MIBRivera and Rhida @ridha_mm_ have successfully graduated from the Erasmus Master in Astrophysics and Space Science (MASS) of the @Univ_CotedAzur. Congratulations! xitter.cf/MIBRivera/status/18379…
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Weizmann Kiendrebeogo successfully defended his PhD yesterday. Congrats Weizmann! @Univ_CotedAzur @Universite_JKZ @ObsCoteAzur
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Sunset over @ObsCoteAzur

ALT Sunset over @ObsCoteAzur

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Kamiel Janssens et al paper on correlated and Newtonian noise impact on third generation GW detectors is published in PhysRevD journals.aps.org/prd/abstrac…
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Noel Dimarcq @lab_artemis est le nouveau president du Bureau des Longitudes Pour en savoir plus intranet.univ-cotedazur.fr/n…
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LIGO-Virgo-KAGRA are announcing #GW230529 the merger of a neutron star and another compact object that is questioning black hole formation scenarios!
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More oca.eu/fr/actualite/4839-obs… and the paper dcc.ligo.org/LIGO-P2300352/p…
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image credit: Shanika Galaudage / Observatoire de la Côte d'Azur
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Virgo is getting ready to join LIGO detectors for the second part of the O4 observing run! @ego_virgo @LIGOWA @LIGOLA
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Congratulations to our colleagues Agnes Fienga et Olivier Minazzoli @OMinazzoli for their review in Living Reviews in Relativity on how planetary ephemerides can be used to test GR link.springer.com/article/10…

Testing theories of gravity with planetary ephemerides

Living Reviews in Relativity - We describe here how planetary ephemerides are built in the framework of General Relativity and how they can be used to test alternative theories. We focus on the...

link.springer.com
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