{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:ZW2WG6MLEZTSPMWSU3DXE2QBGY","short_pith_number":"pith:ZW2WG6ML","canonical_record":{"source":{"id":"0911.1489","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-11-08T06:01:10Z","cross_cats_sorted":[],"title_canon_sha256":"a8bf7995a4b8ba97973c5e1ccdd13062568d82a5e92a5bc4f6d4b7ba8d9b2e2b","abstract_canon_sha256":"d6cb474d8bfcb5e477b2ba5c9c8d83db3971352487287e49877cafafe7e593fc"},"schema_version":"1.0"},"canonical_sha256":"cdb563798b266727b2d2a6c7726a01361c4061b42a337a993f597dc039dab527","source":{"kind":"arxiv","id":"0911.1489","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.1489","created_at":"2026-05-18T02:10:58Z"},{"alias_kind":"arxiv_version","alias_value":"0911.1489v1","created_at":"2026-05-18T02:10:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.1489","created_at":"2026-05-18T02:10:58Z"},{"alias_kind":"pith_short_12","alias_value":"ZW2WG6MLEZTS","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"ZW2WG6MLEZTSPMWS","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"ZW2WG6ML","created_at":"2026-05-18T12:26:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:ZW2WG6MLEZTSPMWSU3DXE2QBGY","target":"record","payload":{"canonical_record":{"source":{"id":"0911.1489","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-11-08T06:01:10Z","cross_cats_sorted":[],"title_canon_sha256":"a8bf7995a4b8ba97973c5e1ccdd13062568d82a5e92a5bc4f6d4b7ba8d9b2e2b","abstract_canon_sha256":"d6cb474d8bfcb5e477b2ba5c9c8d83db3971352487287e49877cafafe7e593fc"},"schema_version":"1.0"},"canonical_sha256":"cdb563798b266727b2d2a6c7726a01361c4061b42a337a993f597dc039dab527","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:10:58.283584Z","signature_b64":"tyW+15QT64e9tXAcuZrhjQJ974evIg5A2wwQJXCJ7H1cvesMI0pwVyzW9wLLP4cjH8ZvXEDleb7NtU36yWbVDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cdb563798b266727b2d2a6c7726a01361c4061b42a337a993f597dc039dab527","last_reissued_at":"2026-05-18T02:10:58.282900Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:10:58.282900Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0911.1489","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":"2026-05-18T02:10:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HomX5j7OTL5dpVycXNOPvZ7Ie2BSFe+M17qGWJrGBR4HwrCcpWF6FnpdpBW0Pna0fQwCtTNMXtmdgX6yOmM4Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T11:59:19.103679Z"},"content_sha256":"6bead55b8052c3aac9b8022ff2a2b44866c7ebb934a80f27c713820a9092c824","schema_version":"1.0","event_id":"sha256:6bead55b8052c3aac9b8022ff2a2b44866c7ebb934a80f27c713820a9092c824"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:ZW2WG6MLEZTSPMWSU3DXE2QBGY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"X-ray emission characteristics of two WR binaries : V444 Cyg and CD Cru","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Brijesh Kumar, Himali Bhatt, J. C. Pandey, K. P. Singh, Ram Sagar","submitted_at":"2009-11-08T06:01:10Z","abstract_excerpt":"We present X-ray analysis of two Wolf-Rayet (WR) binaries: V444 Cyg and CD Cru using the data from observations with XMM-Newton. The X-ray light curves show the phase locked variability in both binaries, where the flux increased by a factor of $\\sim 2$ in the case of V444 Cyg and $\\sim 1.5$ in the case of CD Cru from minimum to maximum. The maximum luminosities in the 0.3--7.5 keV energy band were found to be $5.8\\times10^{32}$ and $2.8\\times10^{32}$ erg s$^{-1}$ for V444 Cyg and CD Cru, respectively. X-ray spectra of these stars confirmed large extinction and revealed hot plasma with prominen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.1489","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":"2026-05-18T02:10:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B/6p8mQrY0Ccv2kCaXKtR20R+Aho7hWQF2ZyqBDJyoT+twc576wpc5fbdx9mhKMI5yP+sNRKukDZgPsi/tPSBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T11:59:19.104029Z"},"content_sha256":"cf5da31b30eed6e7d46f75e7b4beb5f271ff348e8ba7a8b9f0d8302d66f5ebdb","schema_version":"1.0","event_id":"sha256:cf5da31b30eed6e7d46f75e7b4beb5f271ff348e8ba7a8b9f0d8302d66f5ebdb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZW2WG6MLEZTSPMWSU3DXE2QBGY/bundle.json","state_url":"https://pith.science/pith/ZW2WG6MLEZTSPMWSU3DXE2QBGY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZW2WG6MLEZTSPMWSU3DXE2QBGY/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":"2026-05-19T11:59:19Z","links":{"resolver":"https://pith.science/pith/ZW2WG6MLEZTSPMWSU3DXE2QBGY","bundle":"https://pith.science/pith/ZW2WG6MLEZTSPMWSU3DXE2QBGY/bundle.json","state":"https://pith.science/pith/ZW2WG6MLEZTSPMWSU3DXE2QBGY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZW2WG6MLEZTSPMWSU3DXE2QBGY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:ZW2WG6MLEZTSPMWSU3DXE2QBGY","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":"d6cb474d8bfcb5e477b2ba5c9c8d83db3971352487287e49877cafafe7e593fc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-11-08T06:01:10Z","title_canon_sha256":"a8bf7995a4b8ba97973c5e1ccdd13062568d82a5e92a5bc4f6d4b7ba8d9b2e2b"},"schema_version":"1.0","source":{"id":"0911.1489","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.1489","created_at":"2026-05-18T02:10:58Z"},{"alias_kind":"arxiv_version","alias_value":"0911.1489v1","created_at":"2026-05-18T02:10:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.1489","created_at":"2026-05-18T02:10:58Z"},{"alias_kind":"pith_short_12","alias_value":"ZW2WG6MLEZTS","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"ZW2WG6MLEZTSPMWS","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"ZW2WG6ML","created_at":"2026-05-18T12:26:03Z"}],"graph_snapshots":[{"event_id":"sha256:cf5da31b30eed6e7d46f75e7b4beb5f271ff348e8ba7a8b9f0d8302d66f5ebdb","target":"graph","created_at":"2026-05-18T02:10:58Z","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 X-ray analysis of two Wolf-Rayet (WR) binaries: V444 Cyg and CD Cru using the data from observations with XMM-Newton. The X-ray light curves show the phase locked variability in both binaries, where the flux increased by a factor of $\\sim 2$ in the case of V444 Cyg and $\\sim 1.5$ in the case of CD Cru from minimum to maximum. The maximum luminosities in the 0.3--7.5 keV energy band were found to be $5.8\\times10^{32}$ and $2.8\\times10^{32}$ erg s$^{-1}$ for V444 Cyg and CD Cru, respectively. X-ray spectra of these stars confirmed large extinction and revealed hot plasma with prominen","authors_text":"Brijesh Kumar, Himali Bhatt, J. C. Pandey, K. P. Singh, Ram Sagar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-11-08T06:01:10Z","title":"X-ray emission characteristics of two WR binaries : V444 Cyg and CD Cru"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.1489","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":"sha256:6bead55b8052c3aac9b8022ff2a2b44866c7ebb934a80f27c713820a9092c824","target":"record","created_at":"2026-05-18T02:10:58Z","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":"d6cb474d8bfcb5e477b2ba5c9c8d83db3971352487287e49877cafafe7e593fc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-11-08T06:01:10Z","title_canon_sha256":"a8bf7995a4b8ba97973c5e1ccdd13062568d82a5e92a5bc4f6d4b7ba8d9b2e2b"},"schema_version":"1.0","source":{"id":"0911.1489","kind":"arxiv","version":1}},"canonical_sha256":"cdb563798b266727b2d2a6c7726a01361c4061b42a337a993f597dc039dab527","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cdb563798b266727b2d2a6c7726a01361c4061b42a337a993f597dc039dab527","first_computed_at":"2026-05-18T02:10:58.282900Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:10:58.282900Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tyW+15QT64e9tXAcuZrhjQJ974evIg5A2wwQJXCJ7H1cvesMI0pwVyzW9wLLP4cjH8ZvXEDleb7NtU36yWbVDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:10:58.283584Z","signed_message":"canonical_sha256_bytes"},"source_id":"0911.1489","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6bead55b8052c3aac9b8022ff2a2b44866c7ebb934a80f27c713820a9092c824","sha256:cf5da31b30eed6e7d46f75e7b4beb5f271ff348e8ba7a8b9f0d8302d66f5ebdb"],"state_sha256":"0ac6489c28b45e757f03021989f9ba502ddd37fc263ad16e56421d168cef2521"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yDb/9vkMRLmGQ0++Tz1PbuPQwpCQtlUiy7jGqBoSQXwJCC6x04AoQiBPCMtpmHg5RvWCaeUhNk7dZr7oJq/oBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T11:59:19.105702Z","bundle_sha256":"ec0492b6673972a9d72c470ac417368c124b59cac0d009f54450fd6a18fe8584"}}