{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:K3PPVW4JWF4NZWOVSY2JHQ4JY3","short_pith_number":"pith:K3PPVW4J","canonical_record":{"source":{"id":"0906.4448","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-06-24T11:37:23Z","cross_cats_sorted":[],"title_canon_sha256":"ed293a37ad818673ddcb9cdff5efc7c9cb37fd12c12a21e9c469902014a49415","abstract_canon_sha256":"6d83b821b1844d98908d57917260a2ee646105532445b5770049b3b006f86946"},"schema_version":"1.0"},"canonical_sha256":"56defadb89b178dcd9d5963493c389c6dcb0fee7364c1fa4e45e16a77929453e","source":{"kind":"arxiv","id":"0906.4448","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.4448","created_at":"2026-05-18T04:23:34Z"},{"alias_kind":"arxiv_version","alias_value":"0906.4448v3","created_at":"2026-05-18T04:23:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.4448","created_at":"2026-05-18T04:23:34Z"},{"alias_kind":"pith_short_12","alias_value":"K3PPVW4JWF4N","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"K3PPVW4JWF4NZWOV","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"K3PPVW4J","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:K3PPVW4JWF4NZWOVSY2JHQ4JY3","target":"record","payload":{"canonical_record":{"source":{"id":"0906.4448","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-06-24T11:37:23Z","cross_cats_sorted":[],"title_canon_sha256":"ed293a37ad818673ddcb9cdff5efc7c9cb37fd12c12a21e9c469902014a49415","abstract_canon_sha256":"6d83b821b1844d98908d57917260a2ee646105532445b5770049b3b006f86946"},"schema_version":"1.0"},"canonical_sha256":"56defadb89b178dcd9d5963493c389c6dcb0fee7364c1fa4e45e16a77929453e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:23:34.432867Z","signature_b64":"davwikzckNBo684iBoEMpuZL3pFbIZ/alY2prnywGnye4+3ip/ZAthlN0ZF4EARRTt5+hBtkmcnv9/tmOFXmAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"56defadb89b178dcd9d5963493c389c6dcb0fee7364c1fa4e45e16a77929453e","last_reissued_at":"2026-05-18T04:23:34.432375Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:23:34.432375Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0906.4448","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:23:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3FUANNCOKswz32TESYLbjLgrrYjNpnlFIPyjvMOIxhIBJGjEdHH9a/L1i3l+ge80qhcC2dEaUB5qUevv6U2oCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T17:55:31.621102Z"},"content_sha256":"69738f19524aba82c15116f49d28bb9b34fe4db94b013eb99774d2b56d4739df","schema_version":"1.0","event_id":"sha256:69738f19524aba82c15116f49d28bb9b34fe4db94b013eb99774d2b56d4739df"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:K3PPVW4JWF4NZWOVSY2JHQ4JY3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Global disk model for galaxies NGC 1365, NGC 6946, NGC 7793, UGC 6446","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Joanna Ja{\\l}ocha, {\\L}ukasz Bratek, Marek Kutschera, Piotr Skindzier","submitted_at":"2009-06-24T11:37:23Z","abstract_excerpt":"Spiral galaxies are studied using a simple global disc model as a means for approximate determination of mass profiles. Based on rotation curves and the amount of gas (HI+He), we find global surface mass densities consistent with measurements and compare them with B-band surface brightness profiles. As a result we obtain mass-to-light ratio profiles. We give some arguments for why our approach is reliable and sometimes better than those assuming ad hoc the presence of a massive non-baryonic dark matter halo. Using this model, we study galaxies NGC 7793, 1365, 6946 and UGC 6446. Based on a rota"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.4448","kind":"arxiv","version":3},"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":"2026-05-18T04:23:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0S+SW9Xw41fcMfP7hVExRqom4dU9Rifpw+t747plqfBQvb7PXRzNf2DgtKjC/iT8lYbwp5Nh8nOzkCslgTiBAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T17:55:31.621726Z"},"content_sha256":"4aceaee9a280a0da74cbbe13581a68a7f726ac2648d065913430883172e7eb21","schema_version":"1.0","event_id":"sha256:4aceaee9a280a0da74cbbe13581a68a7f726ac2648d065913430883172e7eb21"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K3PPVW4JWF4NZWOVSY2JHQ4JY3/bundle.json","state_url":"https://pith.science/pith/K3PPVW4JWF4NZWOVSY2JHQ4JY3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K3PPVW4JWF4NZWOVSY2JHQ4JY3/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":"2026-06-05T17:55:31Z","links":{"resolver":"https://pith.science/pith/K3PPVW4JWF4NZWOVSY2JHQ4JY3","bundle":"https://pith.science/pith/K3PPVW4JWF4NZWOVSY2JHQ4JY3/bundle.json","state":"https://pith.science/pith/K3PPVW4JWF4NZWOVSY2JHQ4JY3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K3PPVW4JWF4NZWOVSY2JHQ4JY3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:K3PPVW4JWF4NZWOVSY2JHQ4JY3","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":"6d83b821b1844d98908d57917260a2ee646105532445b5770049b3b006f86946","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-06-24T11:37:23Z","title_canon_sha256":"ed293a37ad818673ddcb9cdff5efc7c9cb37fd12c12a21e9c469902014a49415"},"schema_version":"1.0","source":{"id":"0906.4448","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.4448","created_at":"2026-05-18T04:23:34Z"},{"alias_kind":"arxiv_version","alias_value":"0906.4448v3","created_at":"2026-05-18T04:23:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.4448","created_at":"2026-05-18T04:23:34Z"},{"alias_kind":"pith_short_12","alias_value":"K3PPVW4JWF4N","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"K3PPVW4JWF4NZWOV","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"K3PPVW4J","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:4aceaee9a280a0da74cbbe13581a68a7f726ac2648d065913430883172e7eb21","target":"graph","created_at":"2026-05-18T04:23:34Z","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":"Spiral galaxies are studied using a simple global disc model as a means for approximate determination of mass profiles. Based on rotation curves and the amount of gas (HI+He), we find global surface mass densities consistent with measurements and compare them with B-band surface brightness profiles. As a result we obtain mass-to-light ratio profiles. We give some arguments for why our approach is reliable and sometimes better than those assuming ad hoc the presence of a massive non-baryonic dark matter halo. Using this model, we study galaxies NGC 7793, 1365, 6946 and UGC 6446. Based on a rota","authors_text":"Joanna Ja{\\l}ocha, {\\L}ukasz Bratek, Marek Kutschera, Piotr Skindzier","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-06-24T11:37:23Z","title":"Global disk model for galaxies NGC 1365, NGC 6946, NGC 7793, UGC 6446"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.4448","kind":"arxiv","version":3},"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":"sha256:69738f19524aba82c15116f49d28bb9b34fe4db94b013eb99774d2b56d4739df","target":"record","created_at":"2026-05-18T04:23:34Z","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":"6d83b821b1844d98908d57917260a2ee646105532445b5770049b3b006f86946","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-06-24T11:37:23Z","title_canon_sha256":"ed293a37ad818673ddcb9cdff5efc7c9cb37fd12c12a21e9c469902014a49415"},"schema_version":"1.0","source":{"id":"0906.4448","kind":"arxiv","version":3}},"canonical_sha256":"56defadb89b178dcd9d5963493c389c6dcb0fee7364c1fa4e45e16a77929453e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"56defadb89b178dcd9d5963493c389c6dcb0fee7364c1fa4e45e16a77929453e","first_computed_at":"2026-05-18T04:23:34.432375Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:23:34.432375Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"davwikzckNBo684iBoEMpuZL3pFbIZ/alY2prnywGnye4+3ip/ZAthlN0ZF4EARRTt5+hBtkmcnv9/tmOFXmAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:23:34.432867Z","signed_message":"canonical_sha256_bytes"},"source_id":"0906.4448","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:69738f19524aba82c15116f49d28bb9b34fe4db94b013eb99774d2b56d4739df","sha256:4aceaee9a280a0da74cbbe13581a68a7f726ac2648d065913430883172e7eb21"],"state_sha256":"933a77d09beec8ae7d535d45cb0e3c9058b399d300799fa99c0144ec106adf72"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L6Qqyuu4Zt7uFp0BMKlweqeL0NwVcT48GZfuHTrvMGQc8OkYI0E6G02Rlzbn6aYCrUR2IFIfThWMLXs3FO45Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T17:55:31.624945Z","bundle_sha256":"d856cdcd787af435ca475a1b7b341c825de598a48dc35c0fa39c7080ade609b5"}}