{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2023:6T5JQT3JQRW6JV4OLIDED2XFMS","short_pith_number":"pith:6T5JQT3J","schema_version":"1.0","canonical_sha256":"f4fa984f69846de4d78e5a0641eae564a7434b650066e54e29ac0ff55d2a3222","source":{"kind":"arxiv","id":"2304.12137","version":2},"attestation_state":"computed","paper":{"title":"Photometric determination of the mass accretion rates of pre-main-sequence stars. VIII. Recent star formation in NGC 299","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Guido De Marchi, Marissa Vlasblom","submitted_at":"2023-04-24T14:43:38Z","abstract_excerpt":"We studied the properties of the young stellar populations in the NGC 299 cluster in the Small Magellanic Cloud using observations obtained with the Hubble Space Telescope in the $V, I$, and $H\\alpha$ bands. We identified 250 stars with H$\\alpha$ excess exceeding 5 $\\sigma$ and an equivalent width of the H$\\alpha$ emission line of at least 20 \\r{A}, indicating that these stars are still undergoing accretion and therefore represent bona fide pre-main-sequence (PMS) objects. For 240 of these stars, we derived the mass, age, and mass accretion rate by comparing the observed photometry with theore"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2304.12137","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-04-24T14:43:38Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"30e43f506e6dc62679ebfc828d7323d973c8706e26e24c4b2dfc8b7594f1b6e9","abstract_canon_sha256":"c80ca0b2ddc0e394606b72b7bf4f7befda9c48015181b5c33d71905f14532e19"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:34:32.105063Z","signature_b64":"DEp4lq18EA/u/iRtz8v9zSSQmlQT9HqQQK666Upocnjw6zcXBX6Vn2nEY8+PdUsUmhk1edCPZ5ezy0Eorax2Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f4fa984f69846de4d78e5a0641eae564a7434b650066e54e29ac0ff55d2a3222","last_reissued_at":"2026-07-05T06:34:32.104486Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:34:32.104486Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Photometric determination of the mass accretion rates of pre-main-sequence stars. VIII. Recent star formation in NGC 299","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Guido De Marchi, Marissa Vlasblom","submitted_at":"2023-04-24T14:43:38Z","abstract_excerpt":"We studied the properties of the young stellar populations in the NGC 299 cluster in the Small Magellanic Cloud using observations obtained with the Hubble Space Telescope in the $V, I$, and $H\\alpha$ bands. We identified 250 stars with H$\\alpha$ excess exceeding 5 $\\sigma$ and an equivalent width of the H$\\alpha$ emission line of at least 20 \\r{A}, indicating that these stars are still undergoing accretion and therefore represent bona fide pre-main-sequence (PMS) objects. For 240 of these stars, we derived the mass, age, and mass accretion rate by comparing the observed photometry with theore"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2304.12137","kind":"arxiv","version":2},"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/2304.12137/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2304.12137","created_at":"2026-07-05T06:34:32.104550+00:00"},{"alias_kind":"arxiv_version","alias_value":"2304.12137v2","created_at":"2026-07-05T06:34:32.104550+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2304.12137","created_at":"2026-07-05T06:34:32.104550+00:00"},{"alias_kind":"pith_short_12","alias_value":"6T5JQT3JQRW6","created_at":"2026-07-05T06:34:32.104550+00:00"},{"alias_kind":"pith_short_16","alias_value":"6T5JQT3JQRW6JV4O","created_at":"2026-07-05T06:34:32.104550+00:00"},{"alias_kind":"pith_short_8","alias_value":"6T5JQT3J","created_at":"2026-07-05T06:34:32.104550+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/6T5JQT3JQRW6JV4OLIDED2XFMS","json":"https://pith.science/pith/6T5JQT3JQRW6JV4OLIDED2XFMS.json","graph_json":"https://pith.science/api/pith-number/6T5JQT3JQRW6JV4OLIDED2XFMS/graph.json","events_json":"https://pith.science/api/pith-number/6T5JQT3JQRW6JV4OLIDED2XFMS/events.json","paper":"https://pith.science/paper/6T5JQT3J"},"agent_actions":{"view_html":"https://pith.science/pith/6T5JQT3JQRW6JV4OLIDED2XFMS","download_json":"https://pith.science/pith/6T5JQT3JQRW6JV4OLIDED2XFMS.json","view_paper":"https://pith.science/paper/6T5JQT3J","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2304.12137&json=true","fetch_graph":"https://pith.science/api/pith-number/6T5JQT3JQRW6JV4OLIDED2XFMS/graph.json","fetch_events":"https://pith.science/api/pith-number/6T5JQT3JQRW6JV4OLIDED2XFMS/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6T5JQT3JQRW6JV4OLIDED2XFMS/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6T5JQT3JQRW6JV4OLIDED2XFMS/action/storage_attestation","attest_author":"https://pith.science/pith/6T5JQT3JQRW6JV4OLIDED2XFMS/action/author_attestation","sign_citation":"https://pith.science/pith/6T5JQT3JQRW6JV4OLIDED2XFMS/action/citation_signature","submit_replication":"https://pith.science/pith/6T5JQT3JQRW6JV4OLIDED2XFMS/action/replication_record"}},"created_at":"2026-07-05T06:34:32.104550+00:00","updated_at":"2026-07-05T06:34:32.104550+00:00"}