{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:EIUZWGRRZB7QOYE5J6JE6PG7RG","short_pith_number":"pith:EIUZWGRR","canonical_record":{"source":{"id":"1905.00020","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-04-30T18:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"c5c96c269dd2d64e67cbb7598a6f634534bfdd70425b37501ced4baacd48856f","abstract_canon_sha256":"4f97ab5d83e78cf3a622c7e0cb0b9d3400bf4f73f078a3433a8d177938d3e01a"},"schema_version":"1.0"},"canonical_sha256":"22299b1a31c87f07609d4f924f3cdf8999a61c5743c6049882fde63b794f079e","source":{"kind":"arxiv","id":"1905.00020","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.00020","created_at":"2026-05-17T23:43:34Z"},{"alias_kind":"arxiv_version","alias_value":"1905.00020v1","created_at":"2026-05-17T23:43:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.00020","created_at":"2026-05-17T23:43:34Z"},{"alias_kind":"pith_short_12","alias_value":"EIUZWGRRZB7Q","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"EIUZWGRRZB7QOYE5","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"EIUZWGRR","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:EIUZWGRRZB7QOYE5J6JE6PG7RG","target":"record","payload":{"canonical_record":{"source":{"id":"1905.00020","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-04-30T18:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"c5c96c269dd2d64e67cbb7598a6f634534bfdd70425b37501ced4baacd48856f","abstract_canon_sha256":"4f97ab5d83e78cf3a622c7e0cb0b9d3400bf4f73f078a3433a8d177938d3e01a"},"schema_version":"1.0"},"canonical_sha256":"22299b1a31c87f07609d4f924f3cdf8999a61c5743c6049882fde63b794f079e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:34.426060Z","signature_b64":"e7r4zzeY1NMPXnd6georu7I0z0FM1ZdvRWs0ZM0G1LpA+Y4I2HDTcOe+TwD1c4S+swh1crvsHS5JKvQHkF+uBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"22299b1a31c87f07609d4f924f3cdf8999a61c5743c6049882fde63b794f079e","last_reissued_at":"2026-05-17T23:43:34.425596Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:34.425596Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.00020","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":"2026-05-17T23:43:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TEdGwzekcYwdub0/SU0Z2EWnLmdPJ0b7Mc6jio08NLL/IAYNije+S6Cs1GJQAEom5ogXXwjCo/pJwSEc5da/Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T21:07:25.768571Z"},"content_sha256":"1b79d02e39a4c3ba34e881591d73e53f089b897e4d50b738a302eb41ef154a4e","schema_version":"1.0","event_id":"sha256:1b79d02e39a4c3ba34e881591d73e53f089b897e4d50b738a302eb41ef154a4e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:EIUZWGRRZB7QOYE5J6JE6PG7RG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Star Formation Histories of the LEGUS Spiral Galaxies. I. The flocculent spiral NGC 7793","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aida Wofford, Alessandra Aloisi, Angela Adamo, Bruce G. Elmegreen, Daniela Calzetti, Daniel A. Dale, Debra M. Elmegreen, Dimitrios A. Gouliermis, Elena Sabbi, Elena Sacchi, Janice C. Lee, Kathryn Grasha, Leonardo Ubeda, Linda J. Smith, Michele Cignoni, Monica Tosi","submitted_at":"2019-04-30T18:00:00Z","abstract_excerpt":"We present a detailed study of the flocculent spiral galaxy NGC 7793, part of the Sculptor group. By analyzing the resolved stellar populations of the galaxy, located at a distance of ~3.7 Mpc, we infer for the first time its radial star formation history (SFH) from Hubble Space Telescope photometry, thanks to both archival and new data from the Legacy ExtraGalactic UV Survey. We determine an average star formation rate (SFR) for the galaxy portion covered by our F555W and F814W data of 0.23 +- 0.02 Msun/yr over the whole Hubble time, corresponding to a total stellar mass of 3.09 +- 0.33 x 10^"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.00020","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":"2026-05-17T23:43:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xcvxSY5LHSHQCL/aJ/4t5DJDzYnoZggLihWACwQuAsQ0Os+W5LhZ3KDuFd86QCrcXHyF0FtoaBXwR2Sd1o4xDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T21:07:25.768919Z"},"content_sha256":"f14d73fcb8373fa1a42aacf39d8960ffd0f99a1772d57a47817ee358ebc3e8b1","schema_version":"1.0","event_id":"sha256:f14d73fcb8373fa1a42aacf39d8960ffd0f99a1772d57a47817ee358ebc3e8b1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EIUZWGRRZB7QOYE5J6JE6PG7RG/bundle.json","state_url":"https://pith.science/pith/EIUZWGRRZB7QOYE5J6JE6PG7RG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EIUZWGRRZB7QOYE5J6JE6PG7RG/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":"2026-06-03T21:07:25Z","links":{"resolver":"https://pith.science/pith/EIUZWGRRZB7QOYE5J6JE6PG7RG","bundle":"https://pith.science/pith/EIUZWGRRZB7QOYE5J6JE6PG7RG/bundle.json","state":"https://pith.science/pith/EIUZWGRRZB7QOYE5J6JE6PG7RG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EIUZWGRRZB7QOYE5J6JE6PG7RG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:EIUZWGRRZB7QOYE5J6JE6PG7RG","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":"4f97ab5d83e78cf3a622c7e0cb0b9d3400bf4f73f078a3433a8d177938d3e01a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-04-30T18:00:00Z","title_canon_sha256":"c5c96c269dd2d64e67cbb7598a6f634534bfdd70425b37501ced4baacd48856f"},"schema_version":"1.0","source":{"id":"1905.00020","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.00020","created_at":"2026-05-17T23:43:34Z"},{"alias_kind":"arxiv_version","alias_value":"1905.00020v1","created_at":"2026-05-17T23:43:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.00020","created_at":"2026-05-17T23:43:34Z"},{"alias_kind":"pith_short_12","alias_value":"EIUZWGRRZB7Q","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"EIUZWGRRZB7QOYE5","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"EIUZWGRR","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:f14d73fcb8373fa1a42aacf39d8960ffd0f99a1772d57a47817ee358ebc3e8b1","target":"graph","created_at":"2026-05-17T23:43:34Z","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 detailed study of the flocculent spiral galaxy NGC 7793, part of the Sculptor group. By analyzing the resolved stellar populations of the galaxy, located at a distance of ~3.7 Mpc, we infer for the first time its radial star formation history (SFH) from Hubble Space Telescope photometry, thanks to both archival and new data from the Legacy ExtraGalactic UV Survey. We determine an average star formation rate (SFR) for the galaxy portion covered by our F555W and F814W data of 0.23 +- 0.02 Msun/yr over the whole Hubble time, corresponding to a total stellar mass of 3.09 +- 0.33 x 10^","authors_text":"Aida Wofford, Alessandra Aloisi, Angela Adamo, Bruce G. Elmegreen, Daniela Calzetti, Daniel A. Dale, Debra M. Elmegreen, Dimitrios A. Gouliermis, Elena Sabbi, Elena Sacchi, Janice C. Lee, Kathryn Grasha, Leonardo Ubeda, Linda J. Smith, Michele Cignoni, Monica Tosi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-04-30T18:00:00Z","title":"Star Formation Histories of the LEGUS Spiral Galaxies. I. The flocculent spiral NGC 7793"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.00020","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":"sha256:1b79d02e39a4c3ba34e881591d73e53f089b897e4d50b738a302eb41ef154a4e","target":"record","created_at":"2026-05-17T23:43:34Z","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":"4f97ab5d83e78cf3a622c7e0cb0b9d3400bf4f73f078a3433a8d177938d3e01a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-04-30T18:00:00Z","title_canon_sha256":"c5c96c269dd2d64e67cbb7598a6f634534bfdd70425b37501ced4baacd48856f"},"schema_version":"1.0","source":{"id":"1905.00020","kind":"arxiv","version":1}},"canonical_sha256":"22299b1a31c87f07609d4f924f3cdf8999a61c5743c6049882fde63b794f079e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"22299b1a31c87f07609d4f924f3cdf8999a61c5743c6049882fde63b794f079e","first_computed_at":"2026-05-17T23:43:34.425596Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:34.425596Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"e7r4zzeY1NMPXnd6georu7I0z0FM1ZdvRWs0ZM0G1LpA+Y4I2HDTcOe+TwD1c4S+swh1crvsHS5JKvQHkF+uBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:34.426060Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.00020","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1b79d02e39a4c3ba34e881591d73e53f089b897e4d50b738a302eb41ef154a4e","sha256:f14d73fcb8373fa1a42aacf39d8960ffd0f99a1772d57a47817ee358ebc3e8b1"],"state_sha256":"b12ec7287e715ff31ab8618ad2c13c0f3f7e0c4f6a65c80604880ad012dfb404"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nqIbXRbVPVaSGlMGlECy0HOK1/PzSt29lqljNW8ey7s2CbA3zsjCQlmgsgvlI6UWUFum6UFZL3BAU6R3sirUCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T21:07:25.770877Z","bundle_sha256":"3434169681879b8976012167ed5ee099695ba2d881651cd51040eb17aab918a0"}}