{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:HYXNUSQ65YSZKZZSDRVFSNTICK","short_pith_number":"pith:HYXNUSQ6","canonical_record":{"source":{"id":"1806.06841","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-06-18T17:38:49Z","cross_cats_sorted":[],"title_canon_sha256":"5614d1b4760d3ea14a4506765b7d3b407418200475999171ba648544a4ec466c","abstract_canon_sha256":"66bffac67363e6d4024f99537ce3c99afd7cb762e1e1c9470247220c46dcb1b5"},"schema_version":"1.0"},"canonical_sha256":"3e2eda4a1eee259567321c6a59366812bc153e1c5a56ebb9772f807c60913614","source":{"kind":"arxiv","id":"1806.06841","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.06841","created_at":"2026-05-18T00:10:37Z"},{"alias_kind":"arxiv_version","alias_value":"1806.06841v1","created_at":"2026-05-18T00:10:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.06841","created_at":"2026-05-18T00:10:37Z"},{"alias_kind":"pith_short_12","alias_value":"HYXNUSQ65YSZ","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HYXNUSQ65YSZKZZS","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HYXNUSQ6","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:HYXNUSQ65YSZKZZSDRVFSNTICK","target":"record","payload":{"canonical_record":{"source":{"id":"1806.06841","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-06-18T17:38:49Z","cross_cats_sorted":[],"title_canon_sha256":"5614d1b4760d3ea14a4506765b7d3b407418200475999171ba648544a4ec466c","abstract_canon_sha256":"66bffac67363e6d4024f99537ce3c99afd7cb762e1e1c9470247220c46dcb1b5"},"schema_version":"1.0"},"canonical_sha256":"3e2eda4a1eee259567321c6a59366812bc153e1c5a56ebb9772f807c60913614","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:10:37.121716Z","signature_b64":"JHZWVPoBX+IJueR8nih1zXkX635WBYC81X17+2iOjuk1O1IoQanJ/9+pIvMnZXvilur31zN66AKADLpjDDsHDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3e2eda4a1eee259567321c6a59366812bc153e1c5a56ebb9772f807c60913614","last_reissued_at":"2026-05-18T00:10:37.121049Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:10:37.121049Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1806.06841","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":"2026-05-18T00:10:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gID1MCzGplC2gg4hte07GgIaQ/RY6Nfh2IdP9p7tFoiSNHykWRXnQkQ/ywfmLR50JWYegT88tzv38EwWZm0MDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T00:25:50.904964Z"},"content_sha256":"20e99f26d75b08d76b995b3ceaae60214e8d61b216c533acba3e6f99116191e5","schema_version":"1.0","event_id":"sha256:20e99f26d75b08d76b995b3ceaae60214e8d61b216c533acba3e6f99116191e5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:HYXNUSQ65YSZKZZSDRVFSNTICK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Identification and analysis of the young population in the starburst galaxy NGC 253","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"C. Feinstein, G. Baume, M. J. Rodr\\'iguez","submitted_at":"2018-06-18T17:38:49Z","abstract_excerpt":"We present a study of the young population in the starburst galaxy NGC 253. In particular, we focused our attention on searching young star groups, obtaining their main properties and studying their hierarchical organization. For this task, we used multiband images and their corresponding photometric data obtained with the Advanced Camera for Surveys of the Hubble Space Telescope (ACS/HST).\n  We have first derived the absorption affecting the different regions of the galaxy. Then, we applied an automatic and objective searching method over the corrected data in order to detect young star group"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.06841","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":"2026-05-18T00:10:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LHtfyq8//f9Pw7s7UAVcoTJLehOypZTkmSQmcO2JiZIQ1OCzc75wTMFcNcnoVNGy66ugbzHNxLcLFfrlqVthDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T00:25:50.905340Z"},"content_sha256":"9e3cfbedf5b6b33df044024c616ebe43682cd01cea10f8ca40a4ffa4c3ec3d2c","schema_version":"1.0","event_id":"sha256:9e3cfbedf5b6b33df044024c616ebe43682cd01cea10f8ca40a4ffa4c3ec3d2c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HYXNUSQ65YSZKZZSDRVFSNTICK/bundle.json","state_url":"https://pith.science/pith/HYXNUSQ65YSZKZZSDRVFSNTICK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HYXNUSQ65YSZKZZSDRVFSNTICK/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":"2026-06-12T00:25:50Z","links":{"resolver":"https://pith.science/pith/HYXNUSQ65YSZKZZSDRVFSNTICK","bundle":"https://pith.science/pith/HYXNUSQ65YSZKZZSDRVFSNTICK/bundle.json","state":"https://pith.science/pith/HYXNUSQ65YSZKZZSDRVFSNTICK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HYXNUSQ65YSZKZZSDRVFSNTICK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:HYXNUSQ65YSZKZZSDRVFSNTICK","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":"66bffac67363e6d4024f99537ce3c99afd7cb762e1e1c9470247220c46dcb1b5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-06-18T17:38:49Z","title_canon_sha256":"5614d1b4760d3ea14a4506765b7d3b407418200475999171ba648544a4ec466c"},"schema_version":"1.0","source":{"id":"1806.06841","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.06841","created_at":"2026-05-18T00:10:37Z"},{"alias_kind":"arxiv_version","alias_value":"1806.06841v1","created_at":"2026-05-18T00:10:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.06841","created_at":"2026-05-18T00:10:37Z"},{"alias_kind":"pith_short_12","alias_value":"HYXNUSQ65YSZ","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HYXNUSQ65YSZKZZS","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HYXNUSQ6","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:9e3cfbedf5b6b33df044024c616ebe43682cd01cea10f8ca40a4ffa4c3ec3d2c","target":"graph","created_at":"2026-05-18T00:10:37Z","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 study of the young population in the starburst galaxy NGC 253. In particular, we focused our attention on searching young star groups, obtaining their main properties and studying their hierarchical organization. For this task, we used multiband images and their corresponding photometric data obtained with the Advanced Camera for Surveys of the Hubble Space Telescope (ACS/HST).\n  We have first derived the absorption affecting the different regions of the galaxy. Then, we applied an automatic and objective searching method over the corrected data in order to detect young star group","authors_text":"C. Feinstein, G. Baume, M. J. Rodr\\'iguez","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-06-18T17:38:49Z","title":"Identification and analysis of the young population in the starburst galaxy NGC 253"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.06841","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":"sha256:20e99f26d75b08d76b995b3ceaae60214e8d61b216c533acba3e6f99116191e5","target":"record","created_at":"2026-05-18T00:10:37Z","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":"66bffac67363e6d4024f99537ce3c99afd7cb762e1e1c9470247220c46dcb1b5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-06-18T17:38:49Z","title_canon_sha256":"5614d1b4760d3ea14a4506765b7d3b407418200475999171ba648544a4ec466c"},"schema_version":"1.0","source":{"id":"1806.06841","kind":"arxiv","version":1}},"canonical_sha256":"3e2eda4a1eee259567321c6a59366812bc153e1c5a56ebb9772f807c60913614","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3e2eda4a1eee259567321c6a59366812bc153e1c5a56ebb9772f807c60913614","first_computed_at":"2026-05-18T00:10:37.121049Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:10:37.121049Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JHZWVPoBX+IJueR8nih1zXkX635WBYC81X17+2iOjuk1O1IoQanJ/9+pIvMnZXvilur31zN66AKADLpjDDsHDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:10:37.121716Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.06841","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:20e99f26d75b08d76b995b3ceaae60214e8d61b216c533acba3e6f99116191e5","sha256:9e3cfbedf5b6b33df044024c616ebe43682cd01cea10f8ca40a4ffa4c3ec3d2c"],"state_sha256":"6045f388caaba958a2dc5bcf139f58bd9586aa4dc4a63a66c8dd95e360ebab2b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LoHTBSJANwmEg08Zytb7LlNKhQ6xwI0Vui7+nCEuew3t/BLlaIqlzDH4+InGPWEGcxEL+xvZfAFQiQ5exdtmAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-12T00:25:50.907274Z","bundle_sha256":"5e46f0be1fcb82b24cf2fe99c35e74cd0668220caa50148e063bf6120e776afa"}}