{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:BXDHWRNG6J2MXPB4MWJF7W54PK","short_pith_number":"pith:BXDHWRNG","canonical_record":{"source":{"id":"1810.03324","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-10-08T08:47:26Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"ed55d3f0bc4018df9808ba7edf07532fdb149926f0ae96a98fcb2ec7f9c5d699","abstract_canon_sha256":"3019c9a2f75de5624261e88b329fc39b1dc08ec2be9f17a3ac24b77042afacef"},"schema_version":"1.0"},"canonical_sha256":"0dc67b45a6f274cbbc3c65925fdbbc7a912256dcf220aa588d8861c798016b53","source":{"kind":"arxiv","id":"1810.03324","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.03324","created_at":"2026-05-18T00:00:47Z"},{"alias_kind":"arxiv_version","alias_value":"1810.03324v1","created_at":"2026-05-18T00:00:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.03324","created_at":"2026-05-18T00:00:47Z"},{"alias_kind":"pith_short_12","alias_value":"BXDHWRNG6J2M","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"BXDHWRNG6J2MXPB4","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"BXDHWRNG","created_at":"2026-05-18T12:32:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:BXDHWRNG6J2MXPB4MWJF7W54PK","target":"record","payload":{"canonical_record":{"source":{"id":"1810.03324","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-10-08T08:47:26Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"ed55d3f0bc4018df9808ba7edf07532fdb149926f0ae96a98fcb2ec7f9c5d699","abstract_canon_sha256":"3019c9a2f75de5624261e88b329fc39b1dc08ec2be9f17a3ac24b77042afacef"},"schema_version":"1.0"},"canonical_sha256":"0dc67b45a6f274cbbc3c65925fdbbc7a912256dcf220aa588d8861c798016b53","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:00:47.484214Z","signature_b64":"YJotJM1eEgHZuqOcc3wEiwa1mJ2zJ03vIgK7A0G6fxIOxmWAVjGD6ZewpWjCn3wtsh+s9apTck2M4HUiirGyCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0dc67b45a6f274cbbc3c65925fdbbc7a912256dcf220aa588d8861c798016b53","last_reissued_at":"2026-05-18T00:00:47.483736Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:00:47.483736Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1810.03324","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":"2026-05-18T00:00:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HJcQujIdaRxWYKtfEqxvqgd6xqjkeUoXlTXty92O62Kdl778JxRM5GAakQ5hxasHg8Vbe0SkGwPGdh9IQON4CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T21:24:22.083701Z"},"content_sha256":"15bf24668cb283b23634711883d2a892aa3c22a224ca2a09b792df3e8e49c6a2","schema_version":"1.0","event_id":"sha256:15bf24668cb283b23634711883d2a892aa3c22a224ca2a09b792df3e8e49c6a2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:BXDHWRNG6J2MXPB4MWJF7W54PK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the role of supernova kicks in the formation of Galactic double neutron star systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Xiang-Dong Li, Yong Shao","submitted_at":"2018-10-08T08:47:26Z","abstract_excerpt":"In this work we focus on a group of Galactic double neutron star (DNS) systems with long orbital periods of $ \\gtrsim 1$ day and low eccentricities of $\\lesssim 0.4$. The feature of these orbital parameters is used to constrain the evolutionary processes of progenitor binaries and the supernova (SN) kicks of the second born NSs. Adopting that the mass transfer during primordial binary evolution is highly non-conservative (rotation-dependent), the formation of DNS systems involves a double helium star binary phase, the common envelope (CE) evolution initiates before the first NS formation. Duri"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.03324","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":"2026-05-18T00:00:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7feW4nldEgFMUWF8OkZyQHfOedqaQii6fAgX0xsK0XRCLQZqb961m/D/QcEAlRZtVWTB8FoFSRGUHHuGP5IBBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T21:24:22.084383Z"},"content_sha256":"3e6a634c50958cd1ef5208e9ca4dbfb105db6f8036cdd8d3e9beaefac69201f4","schema_version":"1.0","event_id":"sha256:3e6a634c50958cd1ef5208e9ca4dbfb105db6f8036cdd8d3e9beaefac69201f4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BXDHWRNG6J2MXPB4MWJF7W54PK/bundle.json","state_url":"https://pith.science/pith/BXDHWRNG6J2MXPB4MWJF7W54PK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BXDHWRNG6J2MXPB4MWJF7W54PK/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":"2026-05-25T21:24:22Z","links":{"resolver":"https://pith.science/pith/BXDHWRNG6J2MXPB4MWJF7W54PK","bundle":"https://pith.science/pith/BXDHWRNG6J2MXPB4MWJF7W54PK/bundle.json","state":"https://pith.science/pith/BXDHWRNG6J2MXPB4MWJF7W54PK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BXDHWRNG6J2MXPB4MWJF7W54PK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:BXDHWRNG6J2MXPB4MWJF7W54PK","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":"3019c9a2f75de5624261e88b329fc39b1dc08ec2be9f17a3ac24b77042afacef","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-10-08T08:47:26Z","title_canon_sha256":"ed55d3f0bc4018df9808ba7edf07532fdb149926f0ae96a98fcb2ec7f9c5d699"},"schema_version":"1.0","source":{"id":"1810.03324","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.03324","created_at":"2026-05-18T00:00:47Z"},{"alias_kind":"arxiv_version","alias_value":"1810.03324v1","created_at":"2026-05-18T00:00:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.03324","created_at":"2026-05-18T00:00:47Z"},{"alias_kind":"pith_short_12","alias_value":"BXDHWRNG6J2M","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"BXDHWRNG6J2MXPB4","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"BXDHWRNG","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:3e6a634c50958cd1ef5208e9ca4dbfb105db6f8036cdd8d3e9beaefac69201f4","target":"graph","created_at":"2026-05-18T00:00:47Z","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":"In this work we focus on a group of Galactic double neutron star (DNS) systems with long orbital periods of $ \\gtrsim 1$ day and low eccentricities of $\\lesssim 0.4$. The feature of these orbital parameters is used to constrain the evolutionary processes of progenitor binaries and the supernova (SN) kicks of the second born NSs. Adopting that the mass transfer during primordial binary evolution is highly non-conservative (rotation-dependent), the formation of DNS systems involves a double helium star binary phase, the common envelope (CE) evolution initiates before the first NS formation. Duri","authors_text":"Xiang-Dong Li, Yong Shao","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-10-08T08:47:26Z","title":"On the role of supernova kicks in the formation of Galactic double neutron star systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.03324","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":"sha256:15bf24668cb283b23634711883d2a892aa3c22a224ca2a09b792df3e8e49c6a2","target":"record","created_at":"2026-05-18T00:00:47Z","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":"3019c9a2f75de5624261e88b329fc39b1dc08ec2be9f17a3ac24b77042afacef","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-10-08T08:47:26Z","title_canon_sha256":"ed55d3f0bc4018df9808ba7edf07532fdb149926f0ae96a98fcb2ec7f9c5d699"},"schema_version":"1.0","source":{"id":"1810.03324","kind":"arxiv","version":1}},"canonical_sha256":"0dc67b45a6f274cbbc3c65925fdbbc7a912256dcf220aa588d8861c798016b53","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0dc67b45a6f274cbbc3c65925fdbbc7a912256dcf220aa588d8861c798016b53","first_computed_at":"2026-05-18T00:00:47.483736Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:00:47.483736Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YJotJM1eEgHZuqOcc3wEiwa1mJ2zJ03vIgK7A0G6fxIOxmWAVjGD6ZewpWjCn3wtsh+s9apTck2M4HUiirGyCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:00:47.484214Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.03324","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:15bf24668cb283b23634711883d2a892aa3c22a224ca2a09b792df3e8e49c6a2","sha256:3e6a634c50958cd1ef5208e9ca4dbfb105db6f8036cdd8d3e9beaefac69201f4"],"state_sha256":"b910d4e4d6e22ac3020846a7f4dc89aa3efcbcd46d4583fb147a423c0f6d747d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q1A2de5b/EQOne/pr88Yy5QTTF6ZplQoYXlt31CtE/jHUiaCVNBohhWUNySSZD5PpxEJ6swCC5aEDgm15w6AAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T21:24:22.088007Z","bundle_sha256":"bc04fd674ce36c8f3ae203d406721f611305949d15ff12a39f1cab136f9aeba6"}}