{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:HSUSYQWGGFHGX6OKBVPCNBEUNQ","short_pith_number":"pith:HSUSYQWG","canonical_record":{"source":{"id":"1605.05754","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-18T20:38:08Z","cross_cats_sorted":[],"title_canon_sha256":"797446b2ac698ae396a2a3f0560f42af689cd1c2661fc2659a731436d39487bc","abstract_canon_sha256":"d44ad9a851087ffa15c3ff4b4c398a0b38d31dd9202fca79027e375ae1c42131"},"schema_version":"1.0"},"canonical_sha256":"3ca92c42c6314e6bf9ca0d5e2684946c31cddcc609edb1ccc74718b5dfbc74f5","source":{"kind":"arxiv","id":"1605.05754","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.05754","created_at":"2026-05-18T00:47:50Z"},{"alias_kind":"arxiv_version","alias_value":"1605.05754v1","created_at":"2026-05-18T00:47:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.05754","created_at":"2026-05-18T00:47:50Z"},{"alias_kind":"pith_short_12","alias_value":"HSUSYQWGGFHG","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_16","alias_value":"HSUSYQWGGFHGX6OK","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_8","alias_value":"HSUSYQWG","created_at":"2026-05-18T12:30:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:HSUSYQWGGFHGX6OKBVPCNBEUNQ","target":"record","payload":{"canonical_record":{"source":{"id":"1605.05754","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-18T20:38:08Z","cross_cats_sorted":[],"title_canon_sha256":"797446b2ac698ae396a2a3f0560f42af689cd1c2661fc2659a731436d39487bc","abstract_canon_sha256":"d44ad9a851087ffa15c3ff4b4c398a0b38d31dd9202fca79027e375ae1c42131"},"schema_version":"1.0"},"canonical_sha256":"3ca92c42c6314e6bf9ca0d5e2684946c31cddcc609edb1ccc74718b5dfbc74f5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:47:50.691170Z","signature_b64":"cbuo9IZfZJPNWp9lTRVighdFvOKU31JNaAT2kgZI1zaEmQbiLqGhl2EO+JdVIL/5eaRa59eTMiPtekJdEflsAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3ca92c42c6314e6bf9ca0d5e2684946c31cddcc609edb1ccc74718b5dfbc74f5","last_reissued_at":"2026-05-18T00:47:50.690523Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:47:50.690523Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.05754","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":"2026-05-18T00:47:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ljckAtS/C3hSJgXVfEv63aarRxBYFUdmSNvkkl/lJr10tTu7KDWnLbrVZyv+9FHBmopFdAePpUkRfnlzRRvfCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T04:28:42.091496Z"},"content_sha256":"9c9dd153a58314f8a9174be5cdb9d23394e537de2e297dd1a27737fdd6c87b6c","schema_version":"1.0","event_id":"sha256:9c9dd153a58314f8a9174be5cdb9d23394e537de2e297dd1a27737fdd6c87b6c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:HSUSYQWGGFHGX6OKBVPCNBEUNQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Breaking the disc-halo degeneracy in NGC 1291 using hydrodynamic simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Bosma, E. Athanassoula, F. Fragkoudi","submitted_at":"2016-05-18T20:38:08Z","abstract_excerpt":"We present a pilot study on the nearby massive galaxy NGC 1291, in which we aim to constrain the dark matter in the inner regions, by obtaining a dynamical determination of the disc mass-to-light ratio (M/L). To this aim, we model the bar-induced dust lanes in the galaxy, using hydrodynamic gas response simulations. The models have three free parameters, the M/L of the disc, the bar pattern speed and the disc height function. We explore the parameter space to find the best fit models, i.e. those in which the morphology of the shocks in the gas simulations matches the observed dust lanes. The b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.05754","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":"2026-05-18T00:47:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/RksPuVdW/7oL2oCuKpTYSwO9KBvU3UitpY0nuN8otEq7b5MJjUAaRpkKSFTe2IemudtQnLi/UDCxQrftDQ/AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T04:28:42.092159Z"},"content_sha256":"12b76dd7320b02fffe756911a9b4f4ba2f20d4ad0a171348f1c26020ada8efbc","schema_version":"1.0","event_id":"sha256:12b76dd7320b02fffe756911a9b4f4ba2f20d4ad0a171348f1c26020ada8efbc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HSUSYQWGGFHGX6OKBVPCNBEUNQ/bundle.json","state_url":"https://pith.science/pith/HSUSYQWGGFHGX6OKBVPCNBEUNQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HSUSYQWGGFHGX6OKBVPCNBEUNQ/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":"2026-05-20T04:28:42Z","links":{"resolver":"https://pith.science/pith/HSUSYQWGGFHGX6OKBVPCNBEUNQ","bundle":"https://pith.science/pith/HSUSYQWGGFHGX6OKBVPCNBEUNQ/bundle.json","state":"https://pith.science/pith/HSUSYQWGGFHGX6OKBVPCNBEUNQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HSUSYQWGGFHGX6OKBVPCNBEUNQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:HSUSYQWGGFHGX6OKBVPCNBEUNQ","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":"d44ad9a851087ffa15c3ff4b4c398a0b38d31dd9202fca79027e375ae1c42131","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-18T20:38:08Z","title_canon_sha256":"797446b2ac698ae396a2a3f0560f42af689cd1c2661fc2659a731436d39487bc"},"schema_version":"1.0","source":{"id":"1605.05754","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.05754","created_at":"2026-05-18T00:47:50Z"},{"alias_kind":"arxiv_version","alias_value":"1605.05754v1","created_at":"2026-05-18T00:47:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.05754","created_at":"2026-05-18T00:47:50Z"},{"alias_kind":"pith_short_12","alias_value":"HSUSYQWGGFHG","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_16","alias_value":"HSUSYQWGGFHGX6OK","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_8","alias_value":"HSUSYQWG","created_at":"2026-05-18T12:30:22Z"}],"graph_snapshots":[{"event_id":"sha256:12b76dd7320b02fffe756911a9b4f4ba2f20d4ad0a171348f1c26020ada8efbc","target":"graph","created_at":"2026-05-18T00:47:50Z","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 pilot study on the nearby massive galaxy NGC 1291, in which we aim to constrain the dark matter in the inner regions, by obtaining a dynamical determination of the disc mass-to-light ratio (M/L). To this aim, we model the bar-induced dust lanes in the galaxy, using hydrodynamic gas response simulations. The models have three free parameters, the M/L of the disc, the bar pattern speed and the disc height function. We explore the parameter space to find the best fit models, i.e. those in which the morphology of the shocks in the gas simulations matches the observed dust lanes. The b","authors_text":"A. Bosma, E. Athanassoula, F. Fragkoudi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-18T20:38:08Z","title":"Breaking the disc-halo degeneracy in NGC 1291 using hydrodynamic simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.05754","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":"sha256:9c9dd153a58314f8a9174be5cdb9d23394e537de2e297dd1a27737fdd6c87b6c","target":"record","created_at":"2026-05-18T00:47:50Z","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":"d44ad9a851087ffa15c3ff4b4c398a0b38d31dd9202fca79027e375ae1c42131","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-18T20:38:08Z","title_canon_sha256":"797446b2ac698ae396a2a3f0560f42af689cd1c2661fc2659a731436d39487bc"},"schema_version":"1.0","source":{"id":"1605.05754","kind":"arxiv","version":1}},"canonical_sha256":"3ca92c42c6314e6bf9ca0d5e2684946c31cddcc609edb1ccc74718b5dfbc74f5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3ca92c42c6314e6bf9ca0d5e2684946c31cddcc609edb1ccc74718b5dfbc74f5","first_computed_at":"2026-05-18T00:47:50.690523Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:47:50.690523Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cbuo9IZfZJPNWp9lTRVighdFvOKU31JNaAT2kgZI1zaEmQbiLqGhl2EO+JdVIL/5eaRa59eTMiPtekJdEflsAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:47:50.691170Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.05754","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9c9dd153a58314f8a9174be5cdb9d23394e537de2e297dd1a27737fdd6c87b6c","sha256:12b76dd7320b02fffe756911a9b4f4ba2f20d4ad0a171348f1c26020ada8efbc"],"state_sha256":"dd7323b8cfbe7a17f7042983d97edc42e65bbd67dc28f2969bd4544d4095a5d3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FMncaoAc5oM36w3TksVUsZWq7m40N69RhKXw80AQ0xB6PRSwkEKbQkZuSSc3XSZqF9bbKv44NfiyY0zdUdw6Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T04:28:42.096262Z","bundle_sha256":"81676f8e485c0914cce420b2e28a265659007d7dfae18d62450d6c622955c605"}}