{"paper":{"title":"A complete census of $H\\alpha$ emitters in NGC 6397","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"2), 2) ((1) Dipartimento di Fisica e Astronomia, (2) INAF - Osservatorio Astronomico di Bologna, (3) ESO), Alessio Mucciarelli (1, Barbara Lanzoni (1, Cristina Pallanca (1, Francesco R. Ferraro (1, Giacomo Beccari (3), Luca Pasquini (3), Universit\\`a degli Studi di Bologna","submitted_at":"2017-06-28T18:21:12Z","abstract_excerpt":"We used a dataset of archival Hubble Space Telescope images obtained through the F555W, F814W and F656N filters, to perform a complete search for objects showing $H\\alpha$ emission in the globular cluster NGC 6397. As photometric diagnostic, we used the $(V-H\\alpha)_0$ color excess in the $(V-H\\alpha)_0$-$(V-I)_0$ color-color diagram. In the analysed field of view, we identified 53 $H\\alpha$ emitters. In particular, we confirmed the optical counterpart to 20 X-ray sources (7 cataclysmic variables, 2 millisecond pulsars and 11 active binaries) and identified 33 previously unknown sources, thus "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.09435","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":""},"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"}