{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:N2PEFDQ3NABZKPC5BXSFGEKOKW","short_pith_number":"pith:N2PEFDQ3","canonical_record":{"source":{"id":"0711.1588","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-11-10T11:39:24Z","cross_cats_sorted":[],"title_canon_sha256":"24f3b73a217cc18bcf7fdf70f5e9c7041dc564d5815624be6a930dff9a248821","abstract_canon_sha256":"ed74722a9bde3b8ed73d7dfef5c9ba904abc7dca8c0eb0caff4a2434f9f2deaa"},"schema_version":"1.0"},"canonical_sha256":"6e9e428e1b6803953c5d0de453114e55aff8576a7904f1683b5dd9c878352c2f","source":{"kind":"arxiv","id":"0711.1588","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0711.1588","created_at":"2026-07-04T17:06:36Z"},{"alias_kind":"arxiv_version","alias_value":"0711.1588v1","created_at":"2026-07-04T17:06:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0711.1588","created_at":"2026-07-04T17:06:36Z"},{"alias_kind":"pith_short_12","alias_value":"N2PEFDQ3NABZ","created_at":"2026-07-04T17:06:36Z"},{"alias_kind":"pith_short_16","alias_value":"N2PEFDQ3NABZKPC5","created_at":"2026-07-04T17:06:36Z"},{"alias_kind":"pith_short_8","alias_value":"N2PEFDQ3","created_at":"2026-07-04T17:06:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:N2PEFDQ3NABZKPC5BXSFGEKOKW","target":"record","payload":{"canonical_record":{"source":{"id":"0711.1588","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-11-10T11:39:24Z","cross_cats_sorted":[],"title_canon_sha256":"24f3b73a217cc18bcf7fdf70f5e9c7041dc564d5815624be6a930dff9a248821","abstract_canon_sha256":"ed74722a9bde3b8ed73d7dfef5c9ba904abc7dca8c0eb0caff4a2434f9f2deaa"},"schema_version":"1.0"},"canonical_sha256":"6e9e428e1b6803953c5d0de453114e55aff8576a7904f1683b5dd9c878352c2f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:06:36.988259Z","signature_b64":"HkLLFiwAa4tosEekynNrujr9PN0NTngsEdc4S3Y5mNguSALj8VLaAvGqT4bA6L+SMosKUBx3Z+l2094HP/nbCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6e9e428e1b6803953c5d0de453114e55aff8576a7904f1683b5dd9c878352c2f","last_reissued_at":"2026-07-04T17:06:36.987859Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:06:36.987859Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0711.1588","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":"2026-07-04T17:06:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xHsN3DVYBfyog9tjAicbFyV1S52FUYRjghWe/mLHuTbDYIJP6/OheFmbS3C7drc6aAIesol5+53J3Mm1N6f1Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T22:08:31.846648Z"},"content_sha256":"ca8876afafeb662db2c27b4613324987eb80822f9206c1e6f847a501b16b3da0","schema_version":"1.0","event_id":"sha256:ca8876afafeb662db2c27b4613324987eb80822f9206c1e6f847a501b16b3da0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:N2PEFDQ3NABZKPC5BXSFGEKOKW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Life in the last lane: Star formation and chemical evolution in an extremely gas-rich dwarf","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Ayesha Begum, Igor D. Karachentsev, Janice C. Lee, Jayaram N. Chengalur, Robert C.Kennicutt","submitted_at":"2007-11-10T11:39:24Z","abstract_excerpt":"We present an analysis of HI, H-alpha, and oxygen abundance data for NGC 3741. This galaxy has a very extended gas disk (~8.8 times the Holmberg radius), and a dark to luminous (i.e. stellar) mass ratio of ~149, which makes it one of the ``darkest'' dwarf irregular galaxies known. However its ratio of baryons (i.e. gas + stellar) mass to dark mass is typical of that in galaxies. Our new high-resolution HI images of the galaxy show evidence for a large scale (purely gaseous) spiral arm and central bar. Despite the gaseous spiral feature and the on-going star formation, we find that the global g"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0711.1588","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0711.1588/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T17:06:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZKNMjojE1Vm9SMSNBtTSciXuqptr1knk27nMz2Suzci+PluxoRKdhxlrqjmUrkE4UjMw1tw/OgqG1WVwS3P9AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T22:08:31.847163Z"},"content_sha256":"b3e140e58bb3a504852c5b615e98bb2be87499a3e45ac59cb1255ec2a9173f35","schema_version":"1.0","event_id":"sha256:b3e140e58bb3a504852c5b615e98bb2be87499a3e45ac59cb1255ec2a9173f35"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/N2PEFDQ3NABZKPC5BXSFGEKOKW/bundle.json","state_url":"https://pith.science/pith/N2PEFDQ3NABZKPC5BXSFGEKOKW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/N2PEFDQ3NABZKPC5BXSFGEKOKW/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":"2026-08-04T22:08:31Z","links":{"resolver":"https://pith.science/pith/N2PEFDQ3NABZKPC5BXSFGEKOKW","bundle":"https://pith.science/pith/N2PEFDQ3NABZKPC5BXSFGEKOKW/bundle.json","state":"https://pith.science/pith/N2PEFDQ3NABZKPC5BXSFGEKOKW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/N2PEFDQ3NABZKPC5BXSFGEKOKW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:N2PEFDQ3NABZKPC5BXSFGEKOKW","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":"ed74722a9bde3b8ed73d7dfef5c9ba904abc7dca8c0eb0caff4a2434f9f2deaa","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-11-10T11:39:24Z","title_canon_sha256":"24f3b73a217cc18bcf7fdf70f5e9c7041dc564d5815624be6a930dff9a248821"},"schema_version":"1.0","source":{"id":"0711.1588","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0711.1588","created_at":"2026-07-04T17:06:36Z"},{"alias_kind":"arxiv_version","alias_value":"0711.1588v1","created_at":"2026-07-04T17:06:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0711.1588","created_at":"2026-07-04T17:06:36Z"},{"alias_kind":"pith_short_12","alias_value":"N2PEFDQ3NABZ","created_at":"2026-07-04T17:06:36Z"},{"alias_kind":"pith_short_16","alias_value":"N2PEFDQ3NABZKPC5","created_at":"2026-07-04T17:06:36Z"},{"alias_kind":"pith_short_8","alias_value":"N2PEFDQ3","created_at":"2026-07-04T17:06:36Z"}],"graph_snapshots":[{"event_id":"sha256:b3e140e58bb3a504852c5b615e98bb2be87499a3e45ac59cb1255ec2a9173f35","target":"graph","created_at":"2026-07-04T17:06:36Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0711.1588/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an analysis of HI, H-alpha, and oxygen abundance data for NGC 3741. This galaxy has a very extended gas disk (~8.8 times the Holmberg radius), and a dark to luminous (i.e. stellar) mass ratio of ~149, which makes it one of the ``darkest'' dwarf irregular galaxies known. However its ratio of baryons (i.e. gas + stellar) mass to dark mass is typical of that in galaxies. Our new high-resolution HI images of the galaxy show evidence for a large scale (purely gaseous) spiral arm and central bar. Despite the gaseous spiral feature and the on-going star formation, we find that the global g","authors_text":"Ayesha Begum, Igor D. Karachentsev, Janice C. Lee, Jayaram N. Chengalur, Robert C.Kennicutt","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-11-10T11:39:24Z","title":"Life in the last lane: Star formation and chemical evolution in an extremely gas-rich dwarf"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0711.1588","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:ca8876afafeb662db2c27b4613324987eb80822f9206c1e6f847a501b16b3da0","target":"record","created_at":"2026-07-04T17:06:36Z","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":"ed74722a9bde3b8ed73d7dfef5c9ba904abc7dca8c0eb0caff4a2434f9f2deaa","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-11-10T11:39:24Z","title_canon_sha256":"24f3b73a217cc18bcf7fdf70f5e9c7041dc564d5815624be6a930dff9a248821"},"schema_version":"1.0","source":{"id":"0711.1588","kind":"arxiv","version":1}},"canonical_sha256":"6e9e428e1b6803953c5d0de453114e55aff8576a7904f1683b5dd9c878352c2f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6e9e428e1b6803953c5d0de453114e55aff8576a7904f1683b5dd9c878352c2f","first_computed_at":"2026-07-04T17:06:36.987859Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:06:36.987859Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HkLLFiwAa4tosEekynNrujr9PN0NTngsEdc4S3Y5mNguSALj8VLaAvGqT4bA6L+SMosKUBx3Z+l2094HP/nbCA==","signature_status":"signed_v1","signed_at":"2026-07-04T17:06:36.988259Z","signed_message":"canonical_sha256_bytes"},"source_id":"0711.1588","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ca8876afafeb662db2c27b4613324987eb80822f9206c1e6f847a501b16b3da0","sha256:b3e140e58bb3a504852c5b615e98bb2be87499a3e45ac59cb1255ec2a9173f35"],"state_sha256":"cddb83cbb676242ac9b47c8940eca9e8acdee75c43dca7fdbf397940133f375c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kWtQqdG/sJYo8fkFc5RCW765bszqPzKpMaG0zCd5Exqg2/CH2jdexoR251jbXqwm3A0pq2Zc4Jbf23bUXotWAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T22:08:31.850406Z","bundle_sha256":"213c336945a6c69e7d1f046510488356e9e9a6244b5abbfddf7398f3ec65ffdd"}}