{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:VVSRGQ2CMJVJA6L2CYYAXPVAKQ","short_pith_number":"pith:VVSRGQ2C","canonical_record":{"source":{"id":"1801.06080","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-18T15:02:58Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"6078d22cb7f5a5998eb5a45f01c728401215735dacde248341c25a7509dc7dc0","abstract_canon_sha256":"045153928395ef111e2d267c8382c453c3a3755871f7ad0bc53ce479ea21dedc"},"schema_version":"1.0"},"canonical_sha256":"ad65134342626a90797a16300bbea0543831b98faba63ebd0eec1c8d65bdfb93","source":{"kind":"arxiv","id":"1801.06080","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.06080","created_at":"2026-05-18T00:21:06Z"},{"alias_kind":"arxiv_version","alias_value":"1801.06080v2","created_at":"2026-05-18T00:21:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.06080","created_at":"2026-05-18T00:21:06Z"},{"alias_kind":"pith_short_12","alias_value":"VVSRGQ2CMJVJ","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VVSRGQ2CMJVJA6L2","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VVSRGQ2C","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:VVSRGQ2CMJVJA6L2CYYAXPVAKQ","target":"record","payload":{"canonical_record":{"source":{"id":"1801.06080","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-18T15:02:58Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"6078d22cb7f5a5998eb5a45f01c728401215735dacde248341c25a7509dc7dc0","abstract_canon_sha256":"045153928395ef111e2d267c8382c453c3a3755871f7ad0bc53ce479ea21dedc"},"schema_version":"1.0"},"canonical_sha256":"ad65134342626a90797a16300bbea0543831b98faba63ebd0eec1c8d65bdfb93","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:21:06.559973Z","signature_b64":"6+kV8oqROCvFdyqTGBfh8eg2X/inxJXa8APZqlWptO+w+x7R8lGIHH3ukJWwmeMEoDxEmUgYni4tS6IxCRPUCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ad65134342626a90797a16300bbea0543831b98faba63ebd0eec1c8d65bdfb93","last_reissued_at":"2026-05-18T00:21:06.559596Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:21:06.559596Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.06080","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:21:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NmpghsYP/XL0K4qLk0LDiB9mrXsx/+xtU+VFQ/zA6NVfbklAAUwc7/80+tl2TK+vhehpmszh+gHlu2G2FTMRAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:32:35.591525Z"},"content_sha256":"00b535de9e62d7061a77898a9b91f9e6d0902bdbbffad499768904f29888f110","schema_version":"1.0","event_id":"sha256:00b535de9e62d7061a77898a9b91f9e6d0902bdbbffad499768904f29888f110"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:VVSRGQ2CMJVJA6L2CYYAXPVAKQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Precise Distance to the Host Galaxy of the Binary Neutron Star Merger GW170817 Using Surface Brightness Fluctuations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"A. Grado, A. J. Levan, A. S. Fruchter, D. E. Holz, E. Berger, E. Brocato, G. Raimondo, I. Mandel, J. B. Jensen, J. D. Lyman, J. Hjorth, J. P. Blakeslee, K. D. Alexander, M. Branchesi, Michele Cantiello, M. Nicholl, N. R. Tanvir, P. D'Avanzo, P. K. Blanchard, P. K. G. Williams, P. S. Cowperthwaite, R. Chornock, R. Margutti, S. Covino, T. Eftekhari, V. A. Villar, W. Fong, Z. Cano","submitted_at":"2018-01-18T15:02:58Z","abstract_excerpt":"The joint detection of gravitational waves and electromagnetic radiation from the binary neutron star (BNS) merger GW170817 has provided unprecedented insight into a wide range of physical processes: heavy element synthesis via the $r$-process; the production of relativistic ejecta; the equation of state of neutron stars and the nature of the merger remnant; the binary coalescence timescale; and a measurement of the Hubble constant via the \"standard siren\" technique. In detail, all of these results depend on the distance to the host galaxy of the merger event, NGC4993. In this paper we measure"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.06080","kind":"arxiv","version":2},"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":"2026-05-18T00:21:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JtGHUdF97ibLKVxCNrKC291aaWCc3U/O38rJotyQM7cIHompGZRRjT+m6axnvSOzcD8iwjTgWQeUUTgDYvXRDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:32:35.592014Z"},"content_sha256":"e6e2799f66a893d06a25240842cc3e0f065539f5c0b86facd9ba4ff1a649782e","schema_version":"1.0","event_id":"sha256:e6e2799f66a893d06a25240842cc3e0f065539f5c0b86facd9ba4ff1a649782e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VVSRGQ2CMJVJA6L2CYYAXPVAKQ/bundle.json","state_url":"https://pith.science/pith/VVSRGQ2CMJVJA6L2CYYAXPVAKQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VVSRGQ2CMJVJA6L2CYYAXPVAKQ/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":"2026-05-26T16:32:35Z","links":{"resolver":"https://pith.science/pith/VVSRGQ2CMJVJA6L2CYYAXPVAKQ","bundle":"https://pith.science/pith/VVSRGQ2CMJVJA6L2CYYAXPVAKQ/bundle.json","state":"https://pith.science/pith/VVSRGQ2CMJVJA6L2CYYAXPVAKQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VVSRGQ2CMJVJA6L2CYYAXPVAKQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:VVSRGQ2CMJVJA6L2CYYAXPVAKQ","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":"045153928395ef111e2d267c8382c453c3a3755871f7ad0bc53ce479ea21dedc","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-18T15:02:58Z","title_canon_sha256":"6078d22cb7f5a5998eb5a45f01c728401215735dacde248341c25a7509dc7dc0"},"schema_version":"1.0","source":{"id":"1801.06080","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.06080","created_at":"2026-05-18T00:21:06Z"},{"alias_kind":"arxiv_version","alias_value":"1801.06080v2","created_at":"2026-05-18T00:21:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.06080","created_at":"2026-05-18T00:21:06Z"},{"alias_kind":"pith_short_12","alias_value":"VVSRGQ2CMJVJ","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VVSRGQ2CMJVJA6L2","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VVSRGQ2C","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:e6e2799f66a893d06a25240842cc3e0f065539f5c0b86facd9ba4ff1a649782e","target":"graph","created_at":"2026-05-18T00:21:06Z","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":"The joint detection of gravitational waves and electromagnetic radiation from the binary neutron star (BNS) merger GW170817 has provided unprecedented insight into a wide range of physical processes: heavy element synthesis via the $r$-process; the production of relativistic ejecta; the equation of state of neutron stars and the nature of the merger remnant; the binary coalescence timescale; and a measurement of the Hubble constant via the \"standard siren\" technique. In detail, all of these results depend on the distance to the host galaxy of the merger event, NGC4993. In this paper we measure","authors_text":"A. Grado, A. J. Levan, A. S. Fruchter, D. E. Holz, E. Berger, E. Brocato, G. Raimondo, I. Mandel, J. B. Jensen, J. D. Lyman, J. Hjorth, J. P. Blakeslee, K. D. Alexander, M. Branchesi, Michele Cantiello, M. Nicholl, N. R. Tanvir, P. D'Avanzo, P. K. Blanchard, P. K. G. Williams, P. S. Cowperthwaite, R. Chornock, R. Margutti, S. Covino, T. Eftekhari, V. A. Villar, W. Fong, Z. Cano","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-18T15:02:58Z","title":"A Precise Distance to the Host Galaxy of the Binary Neutron Star Merger GW170817 Using Surface Brightness Fluctuations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.06080","kind":"arxiv","version":2},"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":"sha256:00b535de9e62d7061a77898a9b91f9e6d0902bdbbffad499768904f29888f110","target":"record","created_at":"2026-05-18T00:21:06Z","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":"045153928395ef111e2d267c8382c453c3a3755871f7ad0bc53ce479ea21dedc","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-18T15:02:58Z","title_canon_sha256":"6078d22cb7f5a5998eb5a45f01c728401215735dacde248341c25a7509dc7dc0"},"schema_version":"1.0","source":{"id":"1801.06080","kind":"arxiv","version":2}},"canonical_sha256":"ad65134342626a90797a16300bbea0543831b98faba63ebd0eec1c8d65bdfb93","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ad65134342626a90797a16300bbea0543831b98faba63ebd0eec1c8d65bdfb93","first_computed_at":"2026-05-18T00:21:06.559596Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:21:06.559596Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6+kV8oqROCvFdyqTGBfh8eg2X/inxJXa8APZqlWptO+w+x7R8lGIHH3ukJWwmeMEoDxEmUgYni4tS6IxCRPUCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:21:06.559973Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.06080","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:00b535de9e62d7061a77898a9b91f9e6d0902bdbbffad499768904f29888f110","sha256:e6e2799f66a893d06a25240842cc3e0f065539f5c0b86facd9ba4ff1a649782e"],"state_sha256":"ec77f5656940f11b47757ed8160f82c0fa504981749b5f20ca2a222009b9f7fc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P5ke2PgVK0MirSdGORU+yZ3xVgNXD27eq2oorGKMBrNzxRrqojQfw56WInbwm5QYNbP65/ZcgWMjMR7GohT+Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T16:32:35.595509Z","bundle_sha256":"82d6a1967480b75ef082bf5c5b7dacae43d68917dfa8c9a6d1a23dc22ce3f209"}}