{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:QTDDCA5UJXKB4O5CSTUKKAT2IV","short_pith_number":"pith:QTDDCA5U","canonical_record":{"source":{"id":"astro-ph/0406639","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-06-29T07:47:51Z","cross_cats_sorted":[],"title_canon_sha256":"78d8da5282bbc33c93dab3ffd4074169fcbc1b76b4445ad5b96d33c84a79d421","abstract_canon_sha256":"6af144deabd54b17e91b68dcbaef75b2ad27931523e9fcb67e0e0f4cddd562fe"},"schema_version":"1.0"},"canonical_sha256":"84c63103b44dd41e3ba294e8a5027a456b9d59540d45a50126948fea033428e6","source":{"kind":"arxiv","id":"astro-ph/0406639","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0406639","created_at":"2026-05-18T01:40:36Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0406639v1","created_at":"2026-05-18T01:40:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0406639","created_at":"2026-05-18T01:40:36Z"},{"alias_kind":"pith_short_12","alias_value":"QTDDCA5UJXKB","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"QTDDCA5UJXKB4O5C","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"QTDDCA5U","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:QTDDCA5UJXKB4O5CSTUKKAT2IV","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0406639","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-06-29T07:47:51Z","cross_cats_sorted":[],"title_canon_sha256":"78d8da5282bbc33c93dab3ffd4074169fcbc1b76b4445ad5b96d33c84a79d421","abstract_canon_sha256":"6af144deabd54b17e91b68dcbaef75b2ad27931523e9fcb67e0e0f4cddd562fe"},"schema_version":"1.0"},"canonical_sha256":"84c63103b44dd41e3ba294e8a5027a456b9d59540d45a50126948fea033428e6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:36.939545Z","signature_b64":"hpCf+0AXLgWycXg8AUqld9/NTIwgtb1aG0oYy7SYnSdhLQJwFIYclQuM9ZS4f6XSliDuTaez5o11LYxpcFm8DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84c63103b44dd41e3ba294e8a5027a456b9d59540d45a50126948fea033428e6","last_reissued_at":"2026-05-18T01:40:36.938998Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:36.938998Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0406639","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":"2026-05-18T01:40:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BKHzZPJDxlWqs4RGPfSTG+VKhDKlYCQKxk7ePBQIu3eqYxHBUmclNn4fqmhJ43jgZxmOofe/j228SKnb8fMECA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T11:03:52.425371Z"},"content_sha256":"0d5242ee239a23f8e2fdf007609ab6690c8749435f3c651ceb7a2ce0c3430576","schema_version":"1.0","event_id":"sha256:0d5242ee239a23f8e2fdf007609ab6690c8749435f3c651ceb7a2ce0c3430576"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:QTDDCA5UJXKB4O5CSTUKKAT2IV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Embedded Star Clusters in the W51 Giant Molecular Cloud","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Bangalore, C. J. Davis (JAC, Hawaii, Hilo, India), M. S. N. Kumar (CAUP, Porto, Portugal), USA), U. S. Kamath (IIA","submitted_at":"2004-06-29T07:47:51Z","abstract_excerpt":"We present sub-arcsecond (0.35\"-0.9\"), near-infrared J,H,K band photometric observations of six fields along the W51 Giant Molecular Cloud (W51 GMC). Our observations reveal four new, embedded clusters and provide a new high-resolution (0.35\") view of the W51IRS2 (G49.5-0.4) region. The cluster associated with G48.9-0.3 is found to be a double cluster enclosed in a nest of near-infrared nebulosity. We construct stellar surface density maps for four major clusters in the W51 GMC. These unveil the underlying hierarchical structure. Color-color and color-magnitude diagrams for each of these clust"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0406639","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":"2026-05-18T01:40:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xhbal2MbU/vqsbChtw5PxaYRfKzq+oc9rzygHRGYYPv1QT8tEid7Hv/1gYPcKE+mW+Hl8BQJep0emCuqdOEsCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T11:03:52.425947Z"},"content_sha256":"a9a4f86353368afe83b8f2d480b695e4f3d2763e0acfe1b49ace96909a3a0dbf","schema_version":"1.0","event_id":"sha256:a9a4f86353368afe83b8f2d480b695e4f3d2763e0acfe1b49ace96909a3a0dbf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QTDDCA5UJXKB4O5CSTUKKAT2IV/bundle.json","state_url":"https://pith.science/pith/QTDDCA5UJXKB4O5CSTUKKAT2IV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QTDDCA5UJXKB4O5CSTUKKAT2IV/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":"2026-05-26T11:03:52Z","links":{"resolver":"https://pith.science/pith/QTDDCA5UJXKB4O5CSTUKKAT2IV","bundle":"https://pith.science/pith/QTDDCA5UJXKB4O5CSTUKKAT2IV/bundle.json","state":"https://pith.science/pith/QTDDCA5UJXKB4O5CSTUKKAT2IV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QTDDCA5UJXKB4O5CSTUKKAT2IV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:QTDDCA5UJXKB4O5CSTUKKAT2IV","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":"6af144deabd54b17e91b68dcbaef75b2ad27931523e9fcb67e0e0f4cddd562fe","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-06-29T07:47:51Z","title_canon_sha256":"78d8da5282bbc33c93dab3ffd4074169fcbc1b76b4445ad5b96d33c84a79d421"},"schema_version":"1.0","source":{"id":"astro-ph/0406639","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0406639","created_at":"2026-05-18T01:40:36Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0406639v1","created_at":"2026-05-18T01:40:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0406639","created_at":"2026-05-18T01:40:36Z"},{"alias_kind":"pith_short_12","alias_value":"QTDDCA5UJXKB","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"QTDDCA5UJXKB4O5C","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"QTDDCA5U","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:a9a4f86353368afe83b8f2d480b695e4f3d2763e0acfe1b49ace96909a3a0dbf","target":"graph","created_at":"2026-05-18T01:40:36Z","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 sub-arcsecond (0.35\"-0.9\"), near-infrared J,H,K band photometric observations of six fields along the W51 Giant Molecular Cloud (W51 GMC). Our observations reveal four new, embedded clusters and provide a new high-resolution (0.35\") view of the W51IRS2 (G49.5-0.4) region. The cluster associated with G48.9-0.3 is found to be a double cluster enclosed in a nest of near-infrared nebulosity. We construct stellar surface density maps for four major clusters in the W51 GMC. These unveil the underlying hierarchical structure. Color-color and color-magnitude diagrams for each of these clust","authors_text":"Bangalore, C. J. Davis (JAC, Hawaii, Hilo, India), M. S. N. Kumar (CAUP, Porto, Portugal), USA), U. S. Kamath (IIA","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-06-29T07:47:51Z","title":"Embedded Star Clusters in the W51 Giant Molecular Cloud"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0406639","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":"sha256:0d5242ee239a23f8e2fdf007609ab6690c8749435f3c651ceb7a2ce0c3430576","target":"record","created_at":"2026-05-18T01:40:36Z","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":"6af144deabd54b17e91b68dcbaef75b2ad27931523e9fcb67e0e0f4cddd562fe","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-06-29T07:47:51Z","title_canon_sha256":"78d8da5282bbc33c93dab3ffd4074169fcbc1b76b4445ad5b96d33c84a79d421"},"schema_version":"1.0","source":{"id":"astro-ph/0406639","kind":"arxiv","version":1}},"canonical_sha256":"84c63103b44dd41e3ba294e8a5027a456b9d59540d45a50126948fea033428e6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"84c63103b44dd41e3ba294e8a5027a456b9d59540d45a50126948fea033428e6","first_computed_at":"2026-05-18T01:40:36.938998Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:36.938998Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hpCf+0AXLgWycXg8AUqld9/NTIwgtb1aG0oYy7SYnSdhLQJwFIYclQuM9ZS4f6XSliDuTaez5o11LYxpcFm8DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:36.939545Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0406639","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0d5242ee239a23f8e2fdf007609ab6690c8749435f3c651ceb7a2ce0c3430576","sha256:a9a4f86353368afe83b8f2d480b695e4f3d2763e0acfe1b49ace96909a3a0dbf"],"state_sha256":"b5e399bb7345bdd39b5b7c95025d716dac93352f1405a50cdfe832bd319913f7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4hh0jstPtpXjshYwUCZYV3Ik/YipV/ptuEOZXxgP8ujuPxQTymZe5SVQ9aX5uM/wgf24JQw1Ubl+ChbHRwVpBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T11:03:52.429510Z","bundle_sha256":"71c0a3cb86802dd550cfcb11b6d2119157e68ea5ff9445063af4ba6f71c61296"}}