{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:ZWOJTYCSYCK4RSSV22PSKNCZAQ","short_pith_number":"pith:ZWOJTYCS","canonical_record":{"source":{"id":"1810.00374","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-30T13:32:52Z","cross_cats_sorted":[],"title_canon_sha256":"b608bf19119f9005d3eeecc1e461fa516df3a3040687e3afd65d27c47b026cf5","abstract_canon_sha256":"fbfddc587b97902976123dae84f36d76a82d6ec39dd555cbeded23eece3d74d5"},"schema_version":"1.0"},"canonical_sha256":"cd9c99e052c095c8ca55d69f2534590415d1f69414b6dcf42db492d9e575feca","source":{"kind":"arxiv","id":"1810.00374","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.00374","created_at":"2026-05-18T00:04:28Z"},{"alias_kind":"arxiv_version","alias_value":"1810.00374v1","created_at":"2026-05-18T00:04:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.00374","created_at":"2026-05-18T00:04:28Z"},{"alias_kind":"pith_short_12","alias_value":"ZWOJTYCSYCK4","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZWOJTYCSYCK4RSSV","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZWOJTYCS","created_at":"2026-05-18T12:33:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:ZWOJTYCSYCK4RSSV22PSKNCZAQ","target":"record","payload":{"canonical_record":{"source":{"id":"1810.00374","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-30T13:32:52Z","cross_cats_sorted":[],"title_canon_sha256":"b608bf19119f9005d3eeecc1e461fa516df3a3040687e3afd65d27c47b026cf5","abstract_canon_sha256":"fbfddc587b97902976123dae84f36d76a82d6ec39dd555cbeded23eece3d74d5"},"schema_version":"1.0"},"canonical_sha256":"cd9c99e052c095c8ca55d69f2534590415d1f69414b6dcf42db492d9e575feca","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:04:28.049241Z","signature_b64":"fOwcOOJhexMsIduXbZPidOvaA/f28zhpF2yBnJhFTtTbFt6te2HhdszrzKENmiCZE4Zfx10UXkYyWcpwzngKBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cd9c99e052c095c8ca55d69f2534590415d1f69414b6dcf42db492d9e575feca","last_reissued_at":"2026-05-18T00:04:28.048803Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:04:28.048803Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1810.00374","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":"2026-05-18T00:04:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LJwAJit/DkFbB4RX2/1sXAXZd5y8hO3MTVeBuVKTCb6I5wIz20eZrXQDzqY3Bf1rDXm7Tv/rsMVZHgskC8aCAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T01:54:30.254658Z"},"content_sha256":"afe9d49b21802d947d075b493a2c45097bd806a9e18933f5f92839e5fd6cf2a5","schema_version":"1.0","event_id":"sha256:afe9d49b21802d947d075b493a2c45097bd806a9e18933f5f92839e5fd6cf2a5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:ZWOJTYCSYCK4RSSV22PSKNCZAQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dark Matter in the Central Region of NGC 3256","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Adele Laurie Plunkett, Chorng-Yuan Hwang, Israa Abdulqasim Mohammed Ali, Zamri Zainal Abidin","submitted_at":"2018-09-30T13:32:52Z","abstract_excerpt":"We investigated the central mass distribution of the luminous infrared galaxy NGC 3256 at a distance of 35 Mpc by using CO(1-0) observations of the Atacama Large Millimeter and sub-millimeter Array (ALMA) and near-IR data of the Two Micron Sky Survey (2MASS). We found that there is a huge amount of invisible dynamical mass ($4.84 \\times 10^{10} M_{\\odot}$) in the central region of the galaxy. The invisible mass is likely caused by some dark matter, which might have a cuspy dark matter profile. We note that this dark matter is difficult to explain with the conventional Modified Newtonian Dynami"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.00374","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":"2026-05-18T00:04:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Um9ZHzQi5oqMHTrL9u2sPNDXlU8HOg3CAzTaO9yvn8QilgdL+viCi+IKtS2jD40i4tRU8shk8EF1H/rFR6HUAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T01:54:30.255382Z"},"content_sha256":"bb912a063a042a330ce7d4d78cea0586af060b8cffe2166a1bec3c548c3c0e52","schema_version":"1.0","event_id":"sha256:bb912a063a042a330ce7d4d78cea0586af060b8cffe2166a1bec3c548c3c0e52"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZWOJTYCSYCK4RSSV22PSKNCZAQ/bundle.json","state_url":"https://pith.science/pith/ZWOJTYCSYCK4RSSV22PSKNCZAQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZWOJTYCSYCK4RSSV22PSKNCZAQ/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":"2026-06-09T01:54:30Z","links":{"resolver":"https://pith.science/pith/ZWOJTYCSYCK4RSSV22PSKNCZAQ","bundle":"https://pith.science/pith/ZWOJTYCSYCK4RSSV22PSKNCZAQ/bundle.json","state":"https://pith.science/pith/ZWOJTYCSYCK4RSSV22PSKNCZAQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZWOJTYCSYCK4RSSV22PSKNCZAQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ZWOJTYCSYCK4RSSV22PSKNCZAQ","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":"fbfddc587b97902976123dae84f36d76a82d6ec39dd555cbeded23eece3d74d5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-30T13:32:52Z","title_canon_sha256":"b608bf19119f9005d3eeecc1e461fa516df3a3040687e3afd65d27c47b026cf5"},"schema_version":"1.0","source":{"id":"1810.00374","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.00374","created_at":"2026-05-18T00:04:28Z"},{"alias_kind":"arxiv_version","alias_value":"1810.00374v1","created_at":"2026-05-18T00:04:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.00374","created_at":"2026-05-18T00:04:28Z"},{"alias_kind":"pith_short_12","alias_value":"ZWOJTYCSYCK4","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZWOJTYCSYCK4RSSV","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZWOJTYCS","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:bb912a063a042a330ce7d4d78cea0586af060b8cffe2166a1bec3c548c3c0e52","target":"graph","created_at":"2026-05-18T00:04:28Z","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 investigated the central mass distribution of the luminous infrared galaxy NGC 3256 at a distance of 35 Mpc by using CO(1-0) observations of the Atacama Large Millimeter and sub-millimeter Array (ALMA) and near-IR data of the Two Micron Sky Survey (2MASS). We found that there is a huge amount of invisible dynamical mass ($4.84 \\times 10^{10} M_{\\odot}$) in the central region of the galaxy. The invisible mass is likely caused by some dark matter, which might have a cuspy dark matter profile. We note that this dark matter is difficult to explain with the conventional Modified Newtonian Dynami","authors_text":"Adele Laurie Plunkett, Chorng-Yuan Hwang, Israa Abdulqasim Mohammed Ali, Zamri Zainal Abidin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-30T13:32:52Z","title":"Dark Matter in the Central Region of NGC 3256"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.00374","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:afe9d49b21802d947d075b493a2c45097bd806a9e18933f5f92839e5fd6cf2a5","target":"record","created_at":"2026-05-18T00:04:28Z","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":"fbfddc587b97902976123dae84f36d76a82d6ec39dd555cbeded23eece3d74d5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-30T13:32:52Z","title_canon_sha256":"b608bf19119f9005d3eeecc1e461fa516df3a3040687e3afd65d27c47b026cf5"},"schema_version":"1.0","source":{"id":"1810.00374","kind":"arxiv","version":1}},"canonical_sha256":"cd9c99e052c095c8ca55d69f2534590415d1f69414b6dcf42db492d9e575feca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cd9c99e052c095c8ca55d69f2534590415d1f69414b6dcf42db492d9e575feca","first_computed_at":"2026-05-18T00:04:28.048803Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:04:28.048803Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fOwcOOJhexMsIduXbZPidOvaA/f28zhpF2yBnJhFTtTbFt6te2HhdszrzKENmiCZE4Zfx10UXkYyWcpwzngKBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:04:28.049241Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.00374","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:afe9d49b21802d947d075b493a2c45097bd806a9e18933f5f92839e5fd6cf2a5","sha256:bb912a063a042a330ce7d4d78cea0586af060b8cffe2166a1bec3c548c3c0e52"],"state_sha256":"66040f2b1c46e9a545c0cec076c8e688c0cc5adbb4a2cd4030fba94b49f4796b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J/swfnhl2CaRCj1kjZynoeadafDTSnGU2da33vPqmNo794wVmNi5bps3xxHyMU98WTQgMiSSIG2VlpCwnc8dAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T01:54:30.259270Z","bundle_sha256":"9ca0d5df75bac88be659257e721ca943ded1ca87b5c9375ad2daea415a7d7a4f"}}