{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:O3ITSN4EN7JATFTWKCCHFOFCGM","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":"ae67a01666740609e478eec7f5a92ff28ebfc85ba4fd194f90bd869dab42823a","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-04-08T20:11:30Z","title_canon_sha256":"33198ede6ef96517861b35fe8c175cf7070c377ec1485d3c1cbad4bf83fcbdb2"},"schema_version":"1.0","source":{"id":"1004.1422","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.1422","created_at":"2026-05-18T02:08:07Z"},{"alias_kind":"arxiv_version","alias_value":"1004.1422v1","created_at":"2026-05-18T02:08:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.1422","created_at":"2026-05-18T02:08:07Z"},{"alias_kind":"pith_short_12","alias_value":"O3ITSN4EN7JA","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"O3ITSN4EN7JATFTW","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"O3ITSN4E","created_at":"2026-05-18T12:26:12Z"}],"graph_snapshots":[{"event_id":"sha256:92235de314ff54b939d0f58b55b47999ed2184ea1ee32055c39edbbc8e3af2b7","target":"graph","created_at":"2026-05-18T02:08:07Z","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"},"paper":{"abstract_excerpt":"We present Chandra X-ray images of the NGC 2237 young star cluster on the periphery of the Rosette Nebula.  We detect 168 X-ray sources, 80% of which have counterparts in USNO, 2MASS, and deep FLAMINGOS images.  These constitute the first census of the cluster members with 0.2<~M<~2 Msun. Star locations in near-infrared color-magnitude diagrams indicate a cluster age around 2 Myr with a visual extinction of 1<Av<3 at 1.4 kpc, the distance of the Rosette Nebula's main cluster NGC 2244.  We derive the K-band luminosity function and the X-ray luminosity function of the cluster, which indicate a p","authors_text":"Carlos G. Rom\\'an-Z\\'u\\~niga, Elizabeth Lada, Eric D. Feigelson, Gordon Garmire, Junfeng Wang, Leisa K. Townsley, Patrick S. Broos","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-04-08T20:11:30Z","title":"A Chandra Study of the Rosette Star-Forming Complex. III. The NGC 2237 Cluster and the Region's Star Formation History"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.1422","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":"sha256:81baf0cdd95c8a97ecca02fd617ede432856661fe2036c796afd1b437a3ac165","target":"record","created_at":"2026-05-18T02:08:07Z","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":"ae67a01666740609e478eec7f5a92ff28ebfc85ba4fd194f90bd869dab42823a","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-04-08T20:11:30Z","title_canon_sha256":"33198ede6ef96517861b35fe8c175cf7070c377ec1485d3c1cbad4bf83fcbdb2"},"schema_version":"1.0","source":{"id":"1004.1422","kind":"arxiv","version":1}},"canonical_sha256":"76d13937846fd2099676508472b8a233168c7fa071c99347febf5810433746dd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"76d13937846fd2099676508472b8a233168c7fa071c99347febf5810433746dd","first_computed_at":"2026-05-18T02:08:07.711431Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:08:07.711431Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"N7oKcLnyPSNoErHXxSZ5ASj4NvQUGpmVKvZ13ZRRsjVGXFwcr5mF4QYsCdf1nZoCsNi+rqP46juc95KgNHPsCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:08:07.712096Z","signed_message":"canonical_sha256_bytes"},"source_id":"1004.1422","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:81baf0cdd95c8a97ecca02fd617ede432856661fe2036c796afd1b437a3ac165","sha256:92235de314ff54b939d0f58b55b47999ed2184ea1ee32055c39edbbc8e3af2b7"],"state_sha256":"515acbfa5afde39b77942c5ca14f3775d757b7c0df0d0f64767475b1d89de0ac"}