{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:6EYOEKWFSKQLUVFQNVBBESSJZU","short_pith_number":"pith:6EYOEKWF","canonical_record":{"source":{"id":"1312.0812","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-12-03T13:18:44Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"2355da1eb9bf3d99cf170b9a33aa03a46093b9ec640deb9ccff6acf2fb2ede56","abstract_canon_sha256":"63b580171721e112c61f2a59b974724fe4752b62dcc7a6f175756e85c939736b"},"schema_version":"1.0"},"canonical_sha256":"f130e22ac592a0ba54b06d42124a49cd23038d711cbdbbb6247cdf5aef2a9b21","source":{"kind":"arxiv","id":"1312.0812","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.0812","created_at":"2026-05-18T01:45:59Z"},{"alias_kind":"arxiv_version","alias_value":"1312.0812v1","created_at":"2026-05-18T01:45:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.0812","created_at":"2026-05-18T01:45:59Z"},{"alias_kind":"pith_short_12","alias_value":"6EYOEKWFSKQL","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"6EYOEKWFSKQLUVFQ","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"6EYOEKWF","created_at":"2026-05-18T12:27:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:6EYOEKWFSKQLUVFQNVBBESSJZU","target":"record","payload":{"canonical_record":{"source":{"id":"1312.0812","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-12-03T13:18:44Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"2355da1eb9bf3d99cf170b9a33aa03a46093b9ec640deb9ccff6acf2fb2ede56","abstract_canon_sha256":"63b580171721e112c61f2a59b974724fe4752b62dcc7a6f175756e85c939736b"},"schema_version":"1.0"},"canonical_sha256":"f130e22ac592a0ba54b06d42124a49cd23038d711cbdbbb6247cdf5aef2a9b21","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:45:59.221851Z","signature_b64":"j7tlO/ipcOWZnPMmCn7gJPgK1CIOOTjynWSoJg/uZO4r+dYjVlBHbwLWpIF2Xb7rOjsEHjfTqyei2h+nxHYtDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f130e22ac592a0ba54b06d42124a49cd23038d711cbdbbb6247cdf5aef2a9b21","last_reissued_at":"2026-05-18T01:45:59.221402Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:45:59.221402Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1312.0812","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":"2026-05-18T01:45:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F9rfOZjMwnVKxQnekNHWUBjL2O7xwi6kaptS6dOh4FjQxlxGMRlSUyySzGWYtYaBI5sLZ+nFzrrI+JVnEBVwBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T02:16:33.719908Z"},"content_sha256":"d1f1fe06152b68de7cfc8c355c78b7a79d6ebe7973b662378297e98355570af1","schema_version":"1.0","event_id":"sha256:d1f1fe06152b68de7cfc8c355c78b7a79d6ebe7973b662378297e98355570af1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:6EYOEKWFSKQLUVFQNVBBESSJZU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Star-forming regions and the metallicity gradients in the tidal tails: The case of NGC 92","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Claudia Mendes de Oliveira, Duilia de Mello, Henri Plana, Philippe Amram, Sergio Scarano Jr, Sergio Torres-Flores","submitted_at":"2013-12-03T13:18:44Z","abstract_excerpt":"We present new Gemini/GMOS spectroscopic and archival imaging data of the interacting galaxy NGC 92, which is part of a compact group and displays an extended tidal tail. We have studied the physical properties of 20 star-forming complexes in this system. We found that the star-forming regions located in the tidal tail of NGC 92 have ages younger than 8 Myr, which suggests that these objects were formed in situ. The spectroscopic data reveals that these regions have slightly sub-solar metallicities, suggesting that they were formed from pre-enriched material. Using the oxygen abundances derive"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.0812","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":"2026-05-18T01:45:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QJBzgmtkaJwPO6ZdvPx+F3r5O0G0PhVCRql7jjtZdgm1ouvHBPPx77e39rb/S+NimlacJspMmwtZ8BcwWDAEBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T02:16:33.720251Z"},"content_sha256":"03e71ef5152812ffb3d8a0370bbf9c2fc112b6070891f76b431074534ebda65a","schema_version":"1.0","event_id":"sha256:03e71ef5152812ffb3d8a0370bbf9c2fc112b6070891f76b431074534ebda65a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6EYOEKWFSKQLUVFQNVBBESSJZU/bundle.json","state_url":"https://pith.science/pith/6EYOEKWFSKQLUVFQNVBBESSJZU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6EYOEKWFSKQLUVFQNVBBESSJZU/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":"2026-06-03T02:16:33Z","links":{"resolver":"https://pith.science/pith/6EYOEKWFSKQLUVFQNVBBESSJZU","bundle":"https://pith.science/pith/6EYOEKWFSKQLUVFQNVBBESSJZU/bundle.json","state":"https://pith.science/pith/6EYOEKWFSKQLUVFQNVBBESSJZU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6EYOEKWFSKQLUVFQNVBBESSJZU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:6EYOEKWFSKQLUVFQNVBBESSJZU","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":"63b580171721e112c61f2a59b974724fe4752b62dcc7a6f175756e85c939736b","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-12-03T13:18:44Z","title_canon_sha256":"2355da1eb9bf3d99cf170b9a33aa03a46093b9ec640deb9ccff6acf2fb2ede56"},"schema_version":"1.0","source":{"id":"1312.0812","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.0812","created_at":"2026-05-18T01:45:59Z"},{"alias_kind":"arxiv_version","alias_value":"1312.0812v1","created_at":"2026-05-18T01:45:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.0812","created_at":"2026-05-18T01:45:59Z"},{"alias_kind":"pith_short_12","alias_value":"6EYOEKWFSKQL","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"6EYOEKWFSKQLUVFQ","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"6EYOEKWF","created_at":"2026-05-18T12:27:36Z"}],"graph_snapshots":[{"event_id":"sha256:03e71ef5152812ffb3d8a0370bbf9c2fc112b6070891f76b431074534ebda65a","target":"graph","created_at":"2026-05-18T01:45:59Z","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 new Gemini/GMOS spectroscopic and archival imaging data of the interacting galaxy NGC 92, which is part of a compact group and displays an extended tidal tail. We have studied the physical properties of 20 star-forming complexes in this system. We found that the star-forming regions located in the tidal tail of NGC 92 have ages younger than 8 Myr, which suggests that these objects were formed in situ. The spectroscopic data reveals that these regions have slightly sub-solar metallicities, suggesting that they were formed from pre-enriched material. Using the oxygen abundances derive","authors_text":"Claudia Mendes de Oliveira, Duilia de Mello, Henri Plana, Philippe Amram, Sergio Scarano Jr, Sergio Torres-Flores","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-12-03T13:18:44Z","title":"Star-forming regions and the metallicity gradients in the tidal tails: The case of NGC 92"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.0812","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:d1f1fe06152b68de7cfc8c355c78b7a79d6ebe7973b662378297e98355570af1","target":"record","created_at":"2026-05-18T01:45:59Z","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":"63b580171721e112c61f2a59b974724fe4752b62dcc7a6f175756e85c939736b","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-12-03T13:18:44Z","title_canon_sha256":"2355da1eb9bf3d99cf170b9a33aa03a46093b9ec640deb9ccff6acf2fb2ede56"},"schema_version":"1.0","source":{"id":"1312.0812","kind":"arxiv","version":1}},"canonical_sha256":"f130e22ac592a0ba54b06d42124a49cd23038d711cbdbbb6247cdf5aef2a9b21","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f130e22ac592a0ba54b06d42124a49cd23038d711cbdbbb6247cdf5aef2a9b21","first_computed_at":"2026-05-18T01:45:59.221402Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:45:59.221402Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j7tlO/ipcOWZnPMmCn7gJPgK1CIOOTjynWSoJg/uZO4r+dYjVlBHbwLWpIF2Xb7rOjsEHjfTqyei2h+nxHYtDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:45:59.221851Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.0812","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d1f1fe06152b68de7cfc8c355c78b7a79d6ebe7973b662378297e98355570af1","sha256:03e71ef5152812ffb3d8a0370bbf9c2fc112b6070891f76b431074534ebda65a"],"state_sha256":"e390c707578269d21a85364ea701e43e4437d7a09829920d2b1ff84ad674099d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KeI2KKOXm7KVkKqzVVW+klKL7Xr6jrV3QvEp5S0VZflB9XT450OLaLfl/4qDrb1O0BqfJuInNzQVxqyO7hpDBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T02:16:33.722143Z","bundle_sha256":"262a2161c07cc67cbddfcc02e6296da314f7367563132bc05e43b581274e7689"}}