{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:JFP2VBKAMA7AZDM4IPGYNBSOOA","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"d569ba7c6ea56fc70ccf71da7eec7fba5bfdb605999e91237312ec64df78ac15","cross_cats_sorted":["astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-10-07T18:04:43Z","title_canon_sha256":"10245226d75b394d0b3f1f21f045ebc103c62563813628b670f5c08c90b1e757"},"schema_version":"1.0","source":{"id":"2310.04888","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2310.04888","created_at":"2026-07-05T06:58:24Z"},{"alias_kind":"arxiv_version","alias_value":"2310.04888v1","created_at":"2026-07-05T06:58:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2310.04888","created_at":"2026-07-05T06:58:24Z"},{"alias_kind":"pith_short_12","alias_value":"JFP2VBKAMA7A","created_at":"2026-07-05T06:58:24Z"},{"alias_kind":"pith_short_16","alias_value":"JFP2VBKAMA7AZDM4","created_at":"2026-07-05T06:58:24Z"},{"alias_kind":"pith_short_8","alias_value":"JFP2VBKA","created_at":"2026-07-05T06:58:24Z"}],"graph_snapshots":[{"event_id":"sha256:5c981e50b73445c44f330e5f96022f5595cb40966084a156cc2e53b1656bcfd4","target":"graph","created_at":"2026-07-05T06:58:24Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2310.04888/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We performed a HST/WFC3-IR imaging survey of the young stellar cluster NGC 2024 in three filters probing the 1.4~$\\mu$m H$_2$O absorption feature, characteristic of the population of low mass and sub-stellar mass objects down to a few Jupyter masses. We detect 812 point sources, 550 of them in all 3 filters with signal to noise greater than 5. Using a distance-independent two-color diagram we determine extinction values as high as $A_V\\simeq 40$. We also find that the change of effective wavelengths in our filters results in higher $A_V$ values as the reddening increases. Reconstructing a dere","authors_text":"Dana Koeppe, David R. Soderblom, Elena Sabbi, Giovanni Maria Strampelli, Jonathan C. Tan, Leonardo Ubeda, Mario Gennaro, Massimo Robberto, Nicola Da Rio","cross_cats":["astro-ph.SR"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-10-07T18:04:43Z","title":"A HST Study of the Substellar Population of NGC 2024"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2310.04888","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:34c59903d999d92321fe8fb800a0c16190c77d15f4b3c92b54fd835362dfd79d","target":"record","created_at":"2026-07-05T06:58:24Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"d569ba7c6ea56fc70ccf71da7eec7fba5bfdb605999e91237312ec64df78ac15","cross_cats_sorted":["astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-10-07T18:04:43Z","title_canon_sha256":"10245226d75b394d0b3f1f21f045ebc103c62563813628b670f5c08c90b1e757"},"schema_version":"1.0","source":{"id":"2310.04888","kind":"arxiv","version":1}},"canonical_sha256":"495faa8540603e0c8d9c43cd86864e701f00e635c24487ec8bc7b2aaa7547a6e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"495faa8540603e0c8d9c43cd86864e701f00e635c24487ec8bc7b2aaa7547a6e","first_computed_at":"2026-07-05T06:58:24.244152Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:58:24.244152Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6X9J0v2P1H8lfPeTc6E04MEEzyVPcQbqrD8QQH88o3XiI9Skbxlw69stJF/x1KuLNKhNltiA9n0mUwLzi63ZDw==","signature_status":"signed_v1","signed_at":"2026-07-05T06:58:24.244575Z","signed_message":"canonical_sha256_bytes"},"source_id":"2310.04888","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:34c59903d999d92321fe8fb800a0c16190c77d15f4b3c92b54fd835362dfd79d","sha256:5c981e50b73445c44f330e5f96022f5595cb40966084a156cc2e53b1656bcfd4"],"state_sha256":"dfc8a5d65767e37a43a78f769aa02c3e5d8aaf259dda2b778e4dd334860744e9"}