{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:IEBPRQFZKAYKX55YXWKCFGEPJQ","short_pith_number":"pith:IEBPRQFZ","canonical_record":{"source":{"id":"1006.2064","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-06-10T15:30:38Z","cross_cats_sorted":[],"title_canon_sha256":"4ebb8896201f9f55ff420f3adcae5955b921dca6d3ff08a45db4e96343f57335","abstract_canon_sha256":"58814613066cdc2520bc0849d8467733837a1f4ff8770a4119d8dffccaffa2fc"},"schema_version":"1.0"},"canonical_sha256":"4102f8c0b95030abf7b8bd9422988f4c2c879a7b0134eaffd649b82f9d4614ea","source":{"kind":"arxiv","id":"1006.2064","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1006.2064","created_at":"2026-05-18T02:06:55Z"},{"alias_kind":"arxiv_version","alias_value":"1006.2064v3","created_at":"2026-05-18T02:06:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.2064","created_at":"2026-05-18T02:06:55Z"},{"alias_kind":"pith_short_12","alias_value":"IEBPRQFZKAYK","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"IEBPRQFZKAYKX55Y","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"IEBPRQFZ","created_at":"2026-05-18T12:26:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:IEBPRQFZKAYKX55YXWKCFGEPJQ","target":"record","payload":{"canonical_record":{"source":{"id":"1006.2064","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-06-10T15:30:38Z","cross_cats_sorted":[],"title_canon_sha256":"4ebb8896201f9f55ff420f3adcae5955b921dca6d3ff08a45db4e96343f57335","abstract_canon_sha256":"58814613066cdc2520bc0849d8467733837a1f4ff8770a4119d8dffccaffa2fc"},"schema_version":"1.0"},"canonical_sha256":"4102f8c0b95030abf7b8bd9422988f4c2c879a7b0134eaffd649b82f9d4614ea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:06:55.083372Z","signature_b64":"LpziK0oLv0Sn079FkMNC3DjOut8VPUjasOw9O2lE9xpJQyOfT0E0ehOfsqCeMPR740Pdb/3FTqvVfWfSMIsmDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4102f8c0b95030abf7b8bd9422988f4c2c879a7b0134eaffd649b82f9d4614ea","last_reissued_at":"2026-05-18T02:06:55.082622Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:06:55.082622Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1006.2064","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":"2026-05-18T02:06:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kk6hUBeSsgrCeuCoVIvDMxu8J7jyyM+tsX6i37qhgeMPaljuYUJ4UgGOQOM2UolKQWQ67flp9z2FeChNENtdDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T06:23:34.634717Z"},"content_sha256":"9a35fa9cce61060fbb9b047d52d11afc0a057e3b7958c4d64a1dc2c446370f7d","schema_version":"1.0","event_id":"sha256:9a35fa9cce61060fbb9b047d52d11afc0a057e3b7958c4d64a1dc2c446370f7d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:IEBPRQFZKAYKX55YXWKCFGEPJQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SWIFT J1749.4-2807: A neutron or quark star?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Junwei Yu, Renxin Xu","submitted_at":"2010-06-10T15:30:38Z","abstract_excerpt":"We investigate an unique accreting millisecond pulsar with X-ray eclipses, SWIFT J1749.4$-$2807 (hereafter J1749), and try to limit the binary system by various methods including that of the Roche lobe, the mass-radius relations of both a main sequence (MS) and a white dwarf (WD) companion stars, as well as the measured mass function of the pulsar. The calculations are based on the assumption that the radius of the companion star has reached its Roche radius (or at 90%), but the pulsar's mass has not been assumed to be a certain value. Our results are as follows. The companion star should be a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.2064","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":"2026-05-18T02:06:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"31F3ExXEcDSUYQ7WWLIiKP+jakxdTpVQHcYJnq6PqqPvpswxTqkP/srWFNXeEfKky7tmVvRRC1y0PHDE2hrsBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T06:23:34.635060Z"},"content_sha256":"5fdc15e59220d64e2e869fcd9d652630f555ba24b0600b47cbaabe558ea7b9db","schema_version":"1.0","event_id":"sha256:5fdc15e59220d64e2e869fcd9d652630f555ba24b0600b47cbaabe558ea7b9db"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IEBPRQFZKAYKX55YXWKCFGEPJQ/bundle.json","state_url":"https://pith.science/pith/IEBPRQFZKAYKX55YXWKCFGEPJQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IEBPRQFZKAYKX55YXWKCFGEPJQ/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":"2026-06-29T06:23:34Z","links":{"resolver":"https://pith.science/pith/IEBPRQFZKAYKX55YXWKCFGEPJQ","bundle":"https://pith.science/pith/IEBPRQFZKAYKX55YXWKCFGEPJQ/bundle.json","state":"https://pith.science/pith/IEBPRQFZKAYKX55YXWKCFGEPJQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IEBPRQFZKAYKX55YXWKCFGEPJQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:IEBPRQFZKAYKX55YXWKCFGEPJQ","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":"58814613066cdc2520bc0849d8467733837a1f4ff8770a4119d8dffccaffa2fc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-06-10T15:30:38Z","title_canon_sha256":"4ebb8896201f9f55ff420f3adcae5955b921dca6d3ff08a45db4e96343f57335"},"schema_version":"1.0","source":{"id":"1006.2064","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1006.2064","created_at":"2026-05-18T02:06:55Z"},{"alias_kind":"arxiv_version","alias_value":"1006.2064v3","created_at":"2026-05-18T02:06:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.2064","created_at":"2026-05-18T02:06:55Z"},{"alias_kind":"pith_short_12","alias_value":"IEBPRQFZKAYK","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"IEBPRQFZKAYKX55Y","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"IEBPRQFZ","created_at":"2026-05-18T12:26:09Z"}],"graph_snapshots":[{"event_id":"sha256:5fdc15e59220d64e2e869fcd9d652630f555ba24b0600b47cbaabe558ea7b9db","target":"graph","created_at":"2026-05-18T02:06:55Z","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 investigate an unique accreting millisecond pulsar with X-ray eclipses, SWIFT J1749.4$-$2807 (hereafter J1749), and try to limit the binary system by various methods including that of the Roche lobe, the mass-radius relations of both a main sequence (MS) and a white dwarf (WD) companion stars, as well as the measured mass function of the pulsar. The calculations are based on the assumption that the radius of the companion star has reached its Roche radius (or at 90%), but the pulsar's mass has not been assumed to be a certain value. Our results are as follows. The companion star should be a","authors_text":"Junwei Yu, Renxin Xu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-06-10T15:30:38Z","title":"SWIFT J1749.4-2807: A neutron or quark star?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.2064","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":"sha256:9a35fa9cce61060fbb9b047d52d11afc0a057e3b7958c4d64a1dc2c446370f7d","target":"record","created_at":"2026-05-18T02:06:55Z","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":"58814613066cdc2520bc0849d8467733837a1f4ff8770a4119d8dffccaffa2fc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-06-10T15:30:38Z","title_canon_sha256":"4ebb8896201f9f55ff420f3adcae5955b921dca6d3ff08a45db4e96343f57335"},"schema_version":"1.0","source":{"id":"1006.2064","kind":"arxiv","version":3}},"canonical_sha256":"4102f8c0b95030abf7b8bd9422988f4c2c879a7b0134eaffd649b82f9d4614ea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4102f8c0b95030abf7b8bd9422988f4c2c879a7b0134eaffd649b82f9d4614ea","first_computed_at":"2026-05-18T02:06:55.082622Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:06:55.082622Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LpziK0oLv0Sn079FkMNC3DjOut8VPUjasOw9O2lE9xpJQyOfT0E0ehOfsqCeMPR740Pdb/3FTqvVfWfSMIsmDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:06:55.083372Z","signed_message":"canonical_sha256_bytes"},"source_id":"1006.2064","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9a35fa9cce61060fbb9b047d52d11afc0a057e3b7958c4d64a1dc2c446370f7d","sha256:5fdc15e59220d64e2e869fcd9d652630f555ba24b0600b47cbaabe558ea7b9db"],"state_sha256":"3cd8453cc581625a72234b2bfddc9e1be9814762cd4727fc25e2a8aa9e3f6b98"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wQ2hgEMuHB2Ze6/6iwzVAglkuSN69NGW+VJ78EpDRDdfGPKoZpixfYGSPuxdrW2plw3q8aFrvfxWsr+FFYeVAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-29T06:23:34.637304Z","bundle_sha256":"c231d1bc2c679144a3b3bbc3d3f5fe7f5c13bba698d88214af748974e8392f3e"}}