{"paper":{"title":"Hot Rocks Survey IV: Emission from LTT 3780 b is consistent with a bare rock","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Adam J. Burgasser, Alexander D. Rathcke, Am\\'elie Gressier, Bibiana Prinoth, Brett M. Morris, Brice-Olivier Demory, Chloe Fisher, Daniel Kitzmann, Erik Meier Vald\\'es, Hannah Diamond-Lowe, Jegug Ih, Jens Hoeijmakers, Jo\\~ao M. Mendon\\c{c}a, Kevin Heng, Lars A. Buchhave, M{\\aa}ns Holmberg, Mark Fortune, Merlin Zgraggen, Natalie H. Allen, Neale P. Gibson, N\\'estor Espinoza, Prune C. August","submitted_at":"2025-08-19T19:01:37Z","abstract_excerpt":"It is an open question whether small planets around M dwarfs are able to maintain atmospheres. The Hot Rocks Survey aims to address this question by observing 9 rocky exoplanets orbiting M dwarfs with MIRI emission photometry to constrain the onset of atmospheres. In this paper, we present two MIRI F1500W (15$\\mu$m) eclipses of LTT 3780 b, an ultra-short period super-Earth ($P=0.768$ d, $R=1.325 \\,R_\\oplus$, $M = 2.46\\,M_\\oplus$) that receives 111x Earth's instellation, the highest in the survey. We find a combined eclipse depth of $312\\pm38$ ppm, which is consistent between different data red"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.14210","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2508.14210/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}