{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:5XALU2RD4PQGECVAM6C2WEZ4AP","short_pith_number":"pith:5XALU2RD","canonical_record":{"source":{"id":"1507.00016","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-06-30T20:04:26Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"b308da2765ffd6eab45b70124e5ec217b8501186afe500a204018559a83b7475","abstract_canon_sha256":"13886d08cbffb1f464aabdfc1838b1bd437e44b217b7c6e1c768d6239a4f5eb7"},"schema_version":"1.0"},"canonical_sha256":"edc0ba6a23e3e0620aa06785ab133c03dafe515804a0b8303c5e1ebbfd4868f3","source":{"kind":"arxiv","id":"1507.00016","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.00016","created_at":"2026-05-18T01:33:42Z"},{"alias_kind":"arxiv_version","alias_value":"1507.00016v1","created_at":"2026-05-18T01:33:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.00016","created_at":"2026-05-18T01:33:42Z"},{"alias_kind":"pith_short_12","alias_value":"5XALU2RD4PQG","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"5XALU2RD4PQGECVA","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"5XALU2RD","created_at":"2026-05-18T12:29:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:5XALU2RD4PQGECVAM6C2WEZ4AP","target":"record","payload":{"canonical_record":{"source":{"id":"1507.00016","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-06-30T20:04:26Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"b308da2765ffd6eab45b70124e5ec217b8501186afe500a204018559a83b7475","abstract_canon_sha256":"13886d08cbffb1f464aabdfc1838b1bd437e44b217b7c6e1c768d6239a4f5eb7"},"schema_version":"1.0"},"canonical_sha256":"edc0ba6a23e3e0620aa06785ab133c03dafe515804a0b8303c5e1ebbfd4868f3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:33:42.687209Z","signature_b64":"AyK3dxIVci9lcHIiGay1gMYbdS4cZKW57805PUgK+ACL02+tCL+gmFjEyxlJG3yuAb4vpqkhaNSAdjsxYlpvDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"edc0ba6a23e3e0620aa06785ab133c03dafe515804a0b8303c5e1ebbfd4868f3","last_reissued_at":"2026-05-18T01:33:42.686825Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:33:42.686825Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.00016","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:33:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kKCdiJf0UQMikhN3bn9ODzqBFyB8o2842oHrdYeBhrIgwUacmmurD1MBD+3Mku2XZLL3NM2HJdVal2Imveg3Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T21:06:26.782240Z"},"content_sha256":"a8186d3d13ebb67ce4267c8956de6ac501d79aae93b72eba58a8b2c4c43a9ced","schema_version":"1.0","event_id":"sha256:a8186d3d13ebb67ce4267c8956de6ac501d79aae93b72eba58a8b2c4c43a9ced"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:5XALU2RD4PQGECVAM6C2WEZ4AP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Star Formation Across the W3 Complex","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"(2) Facultad de F\\'isica, (3) Astronomy Department, (4) Institute of Astronomy, C. G. Rom\\'an-Z\\'u\\~niga (1), E. A. Lada (3), G. Megias (2), J. F. Alves (4) ((1) Instituto de Astronom\\'ia, J. Ybarra (1), Mexico, M. Tapia (1), Spain, UNAM, Universidad de Sevilla, University of Florida, University of Vienna)","submitted_at":"2015-06-30T20:04:26Z","abstract_excerpt":"We present a multi-wavelength analysis of the history of star formation in the W3 complex. Using deep, near-infrared ground-based images, combined with images obtained with Spitzer and Chandra observatories, we identified and classified young embedded sources. We identified the principal clusters in the complex, and determined their structure and extension. We constructed extinction-limited samples for five principal clusters, and constructed K-band luminosity functions (KLF) that we compare with those of artificial clusters with varying ages. This analysis provided mean ages and possible age "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.00016","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:33:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Jn/TY5bsrakVYrssKj6HwA9E3wE9Sbbp293gySy1lwCcWIKaL8upRFrF802R5AUruPvZHbfdzv/P5KxBTHdjAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T21:06:26.782756Z"},"content_sha256":"9ceacf39cd7b83e81d0f56570bd4a5a44c67e8c6fec53b0504fac51de71cc5b3","schema_version":"1.0","event_id":"sha256:9ceacf39cd7b83e81d0f56570bd4a5a44c67e8c6fec53b0504fac51de71cc5b3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5XALU2RD4PQGECVAM6C2WEZ4AP/bundle.json","state_url":"https://pith.science/pith/5XALU2RD4PQGECVAM6C2WEZ4AP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5XALU2RD4PQGECVAM6C2WEZ4AP/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-28T21:06:26Z","links":{"resolver":"https://pith.science/pith/5XALU2RD4PQGECVAM6C2WEZ4AP","bundle":"https://pith.science/pith/5XALU2RD4PQGECVAM6C2WEZ4AP/bundle.json","state":"https://pith.science/pith/5XALU2RD4PQGECVAM6C2WEZ4AP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5XALU2RD4PQGECVAM6C2WEZ4AP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:5XALU2RD4PQGECVAM6C2WEZ4AP","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":"13886d08cbffb1f464aabdfc1838b1bd437e44b217b7c6e1c768d6239a4f5eb7","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-06-30T20:04:26Z","title_canon_sha256":"b308da2765ffd6eab45b70124e5ec217b8501186afe500a204018559a83b7475"},"schema_version":"1.0","source":{"id":"1507.00016","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.00016","created_at":"2026-05-18T01:33:42Z"},{"alias_kind":"arxiv_version","alias_value":"1507.00016v1","created_at":"2026-05-18T01:33:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.00016","created_at":"2026-05-18T01:33:42Z"},{"alias_kind":"pith_short_12","alias_value":"5XALU2RD4PQG","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"5XALU2RD4PQGECVA","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"5XALU2RD","created_at":"2026-05-18T12:29:07Z"}],"graph_snapshots":[{"event_id":"sha256:9ceacf39cd7b83e81d0f56570bd4a5a44c67e8c6fec53b0504fac51de71cc5b3","target":"graph","created_at":"2026-05-18T01:33:42Z","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 a multi-wavelength analysis of the history of star formation in the W3 complex. Using deep, near-infrared ground-based images, combined with images obtained with Spitzer and Chandra observatories, we identified and classified young embedded sources. We identified the principal clusters in the complex, and determined their structure and extension. We constructed extinction-limited samples for five principal clusters, and constructed K-band luminosity functions (KLF) that we compare with those of artificial clusters with varying ages. This analysis provided mean ages and possible age ","authors_text":"(2) Facultad de F\\'isica, (3) Astronomy Department, (4) Institute of Astronomy, C. G. Rom\\'an-Z\\'u\\~niga (1), E. A. Lada (3), G. Megias (2), J. F. Alves (4) ((1) Instituto de Astronom\\'ia, J. Ybarra (1), Mexico, M. Tapia (1), Spain, UNAM, Universidad de Sevilla, University of Florida, University of Vienna)","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-06-30T20:04:26Z","title":"Star Formation Across the W3 Complex"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.00016","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:a8186d3d13ebb67ce4267c8956de6ac501d79aae93b72eba58a8b2c4c43a9ced","target":"record","created_at":"2026-05-18T01:33:42Z","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":"13886d08cbffb1f464aabdfc1838b1bd437e44b217b7c6e1c768d6239a4f5eb7","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-06-30T20:04:26Z","title_canon_sha256":"b308da2765ffd6eab45b70124e5ec217b8501186afe500a204018559a83b7475"},"schema_version":"1.0","source":{"id":"1507.00016","kind":"arxiv","version":1}},"canonical_sha256":"edc0ba6a23e3e0620aa06785ab133c03dafe515804a0b8303c5e1ebbfd4868f3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"edc0ba6a23e3e0620aa06785ab133c03dafe515804a0b8303c5e1ebbfd4868f3","first_computed_at":"2026-05-18T01:33:42.686825Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:33:42.686825Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AyK3dxIVci9lcHIiGay1gMYbdS4cZKW57805PUgK+ACL02+tCL+gmFjEyxlJG3yuAb4vpqkhaNSAdjsxYlpvDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:33:42.687209Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.00016","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a8186d3d13ebb67ce4267c8956de6ac501d79aae93b72eba58a8b2c4c43a9ced","sha256:9ceacf39cd7b83e81d0f56570bd4a5a44c67e8c6fec53b0504fac51de71cc5b3"],"state_sha256":"8b55cfca6256b1407267fa0f305ec2ce0db379e1972ba328d4eb4d4f347ef26a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"elEl00VqLoOGDXVEBtWZO2GdjNw4P2miIgddObi700WWrqKwlgc8Amu4gqvz1b+7aoDmNFIZiIH7g4m3L7FgAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T21:06:26.786142Z","bundle_sha256":"9ae5d59bdb0c0dead62b7993bc7fba749fe104a1450072e8024e86bd4607e563"}}