BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Newsletter April 2026 DTSTART:20260424T110000Z DTEND:20260424T130000Z DTSTAMP:20260429T204300Z UID:indico-event-52055@agenda.infn.it DESCRIPTION:This is April’s edition of the newsletter of the COST action . The aim is to keep you updated on recent and upcoming conferences and po stdoc positions on subjects related to WISPs.\n \n \nCosmic Wispers prep rints\n \nDark graviton sensing with magnetically levitated superconducto rs\nValentina Danieli\, Paola C. M. Delgado\, Federico R. Urban\nhttps://a rxiv.org/abs/2603.22647\nIn this work we study how a magnetically levitate d superconductor responds to a spin-2 dark matter field\, the dark gravito n\, in the dHz to kHz frequency range. We show that the dark graviton coup ling to matter produces a strain-like tidal acceleration between the super conductor and the readout pick-up loop in a way that is akin to a slow\, c ontinuous\, massive gravitational wave – this coupling however is challe nging to detect. We also show that the coupling to light induces an effect ive current that sources an oscillating magnetic field\, thus driving the superdiamagnetic response of the superconductor. In this case we find that magnetically levitated superconductors could be among the most sensitive laboratory probes of the dark-graviton coupling to electromagnetism\, espe cially at low frequencies.\n\nDeeper analysis of Fermi-LAT unassociated 4F GL J2112.5-3043 for possible identification\nFederica Giacchino\, Cristina Fernández-Suárez\, Miguel Á Sánchez-Conde\, M.Ángeles Pérez-García \, Stefano Ciprini\, Dario Gasparrini\nhttps://arxiv.org/abs/2604.14794\nI n the 4FGL-DR4 point-source catalog of the Large Area Telescope (LAT) onbo ard NASA's Fermi Gamma-ray Observatory (Fermi-LAT)\, around a third of the sources are still unidentified (unIDs). In this work\, we perform a detai led study of one of them\, namely 4FGL J2112.5-3043. Only gamma-ray emissi on has been detected from this unidentified source\, with no counterpart o bserved at any other wavelength as of today. Together with its high detect ion significance\, this makes 4FGL J2112.5-3043 a particularly compelling target for further investigation. The results of our spectral and spatial analyses show that the source photon spectrum is better described with a s ubexponential cutoff power-law spectral model\, with no significant flux v ariability over time\, and a morphology consistent with being a point-like source. We investigate and discuss the characterized emission within the context of both conventional and exotic astrophysics\, namely a pulsar ori gin or potential dark matter (DM) annihilations in a nearby Galactic subha lo. Although our results are inconclusive and neither confirm a DM origin nor firmly establish an astrophysical nature\, we find a spectral preferen ce for the b\\bar{b} and c\\bar{c} DM annihilation channels over a pulsar origin\, thus making this unID a particularly intriguing candidate for nex t multiwavelength observations.\n\nWe encourage participants in the COST a ction to send us a small summary\, typically smaller than the abstract\, o f their own articles that will appear in the arXiv (after they appear\, wi th their arXiv numbers). The summary will be disseminated in the newslette r.\nSend email to \nAlessandro Lella alessandro.lella@unipd.it\nDamiano F iorillo damianofg@gmail.com\nwith subject: preprint summary for Cosmic WIS Pers newsletter.\n\nPhD/Postdoc/Junior Positions\n\n\nApril\n\n\n\nPostdoc toral positions in supernova neutrino physics\, Beijing link\n\n\nPostdoct oral positions for cosmic exotic particle search\, USTC\, Hefei link\n\n\n \nMay\n\n\n\nPhD positions in Astrophysics\, Cosmology and Gravitation\, E spirito Santo University\, South America. link\n\n\n\nAugust\n\n\n\nPostdo ctoral researcher positions in theoretical astroparticle physics and axion phenomenology\, Annecy LAPTH link\n\n \n\n\nConferences\n\n\nApril\n\n\n \n7th Edition of the international conference Progress on Old and New Them es in cosmology (PONT 2026) link\n\n\n\nMay\n\n\n\nUniVersum VII -- Naples 2026 link\n\n\nSCALE 2026: Strings & Cosmology – All Lengths Explored ( SCALE) link\n\n\nPlanck2026 & 6th EuCAPT Symposium link\n\n\n6th New Physi cs Opportunities at Neutrino Facilities Workshop (NPN 2026) link\n\n\n\nJu ne\n\n\n\n16th International Workshop on the Identification of Dark Matter 2026 (IDM 2026) link\n\n\n32nd International Conference on Neutrino Physi cs and Astrophysics (Neutrino 2026) link\n\n\nPASCOS 2026: The 31st Intern ational Symposium on Particles\, Strings\, and Cosmology (PASCOS2026) link \n\n\nBlack Holes & Cosmology 2026 (BHCos26) link\n\n\n4th Training School of the COST Action CA21106: Cosmic WISPers link\n\n\n4th General Meeting of the COST Action: Cosmic WISPers (CA21106) link\n\n\nPrimordial Cosmolog y: Novel Perspectives from Scattering Amplitudes\, Holography and the Boot strap link\n\n\n\nJuly\n\n\n\nExploring New Frontiers in Cosmology: GGI Wo rkshop link\n\n\nDark Matter and Stars: Multi-Messenger Probes of Dark Mat ter and Modified Gravity (icdms2026) link\n\n\nAxions in Seoul 2026: Front iers in Theory\, Cosmology\, and Experiment (AiS 2026) link\n\n\nNew Front iers in Strong gravity link\n\n\n\nAugust\n\n\n\nXVI International Confere nce on Gravitation\, Astrophysics and Cosmology (ICGAC16) link\n\n\nInvisi bles 26 link\n\n\nListening to the Cosmos: New Frontiers in Gravitational Wave Physics link\n\n\nCOSMO-26: 29th International Conference on Particle Physics & Cosmology link\n\n\nNeutrino Oscillation Workshop 2026 (NOW 202 6) link\n\n\n\nSeptember\n\n\n\nNeutrino Oscillation Workshop 2026 (NOW 20 26) link\n\n\nErice International School/Workshop of Nuclear Physics\, 47t h course on 'Neutrinos in Cosmology\, in Astro-\, Particle- and Nuclear Ph ysics' link\n\n\n36th International School “Francesco Romano” on Nucle ar\, Subnuclear and Astroparticle Physics (ISFR 2026) link\n\n\n2nd UNDARK workshop: Astrophysical searches of dark sectors with gamma-ray observati ons link\n\n\n\nNovember\n\n\n\n21st Patras Workshop on Axions\, WIMPs and WISPs link\n\n\n\nDecember\n\n\n\n4th International Conference on Neutrin os and Dark Matter (NuDM- 2026) link\n\n\n\n \n\nhttps://agenda.infn.it/e vent/52055/ URL:https://agenda.infn.it/event/52055/ END:VEVENT END:VCALENDAR