{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:PFGMFCMS7UDI7B4EUWFJ5AIB55","short_pith_number":"pith:PFGMFCMS","canonical_record":{"source":{"id":"astro-ph/0609676","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-25T14:12:58Z","cross_cats_sorted":[],"title_canon_sha256":"b714c3f6d7a8914e8b019490a148df9a1e6b98b15683c4d40eaf547e66ea6287","abstract_canon_sha256":"a31ef748b2e300cb3c301a2083050214f70c70c9e05c54dd5c679a5a1829865a"},"schema_version":"1.0"},"canonical_sha256":"794cc28992fd068f8784a58a9e8101ef7df79c1471b436687fc8f2d627bbbdcf","source":{"kind":"arxiv","id":"astro-ph/0609676","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0609676","created_at":"2026-05-18T04:28:57Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0609676v1","created_at":"2026-05-18T04:28:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0609676","created_at":"2026-05-18T04:28:57Z"},{"alias_kind":"pith_short_12","alias_value":"PFGMFCMS7UDI","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"PFGMFCMS7UDI7B4E","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"PFGMFCMS","created_at":"2026-05-18T12:25:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:PFGMFCMS7UDI7B4EUWFJ5AIB55","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0609676","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-25T14:12:58Z","cross_cats_sorted":[],"title_canon_sha256":"b714c3f6d7a8914e8b019490a148df9a1e6b98b15683c4d40eaf547e66ea6287","abstract_canon_sha256":"a31ef748b2e300cb3c301a2083050214f70c70c9e05c54dd5c679a5a1829865a"},"schema_version":"1.0"},"canonical_sha256":"794cc28992fd068f8784a58a9e8101ef7df79c1471b436687fc8f2d627bbbdcf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:28:57.599087Z","signature_b64":"mi60NfuSOquabFJdCIxt/skfYGZ5n/fzzYJXL4+b6DoFxb2/UZi5vnyY8vYYqv0VqcvQ7kwUksxfJG9PRGkABQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"794cc28992fd068f8784a58a9e8101ef7df79c1471b436687fc8f2d627bbbdcf","last_reissued_at":"2026-05-18T04:28:57.598610Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:28:57.598610Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0609676","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":"2026-05-18T04:28:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"13KwZ6QGZ2Kferr7GpY5wMb7+5COfPc0Zl0FH9skPhZMWLRDvCU3bRtRVxtDVMkdcbNQTkNF/qESLyc+0u2RAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T15:42:38.611412Z"},"content_sha256":"47e3b87f3b878bc3670abd288ece3340c04f2c0a35891b84f940ef2a8249e25c","schema_version":"1.0","event_id":"sha256:47e3b87f3b878bc3670abd288ece3340c04f2c0a35891b84f940ef2a8249e25c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:PFGMFCMS7UDI7B4EUWFJ5AIB55","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the nature of the hard X-ray source IGR J2018+4043","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.M.Bykov, A.M.Krassilchtchikov, E.B.Giacani, F.Lebrun, G.G.Pavlov, G.M.Dubner, G.Rauw, H.Bloemen, J.A.Kennea, J.Kaastra, J.-P.Swings, M.DeBecker, M.Renaud, R.Terrier, W.Hermsen, Yu.A.Uvarov","submitted_at":"2006-09-25T14:12:58Z","abstract_excerpt":"We found a very likely counterpart to the recently discovered hard X-ray source IGR J2018+4043 in the multi-wavelength observations of the source field. The source, originally discovered in the 20-40 keV band, is now confidently detected also in the 40-80 keV band, with a flux of (1.4 +/- 0.4) x 10(-11) erg cm(-2) s(-1). A 5 ks Swift observation of the IGR J2018+4043 field revealed a hard point-like source with the observed 0.5-10 keV flux of 3.4(+0.7)(-0.8) x 10(-12) erg cm(-2) s(-1) (90% confidence level) at alpha = 20h18m38.55s, delta = +40d41m00.4s (with a 4.2\" uncertainty). The combined S"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0609676","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":"2026-05-18T04:28:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d2uvhDYwu6/CEA7lof3+HqKC78q9n3wqVk8GHhQe9DTMdcDeELUN8eLUvl3GrIxvU01RKhdcvqBTFAzkLf/pDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T15:42:38.611777Z"},"content_sha256":"454eb30ad4191708927b5086fee6ef00ae8ae3a654f104d5483204503939df45","schema_version":"1.0","event_id":"sha256:454eb30ad4191708927b5086fee6ef00ae8ae3a654f104d5483204503939df45"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PFGMFCMS7UDI7B4EUWFJ5AIB55/bundle.json","state_url":"https://pith.science/pith/PFGMFCMS7UDI7B4EUWFJ5AIB55/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PFGMFCMS7UDI7B4EUWFJ5AIB55/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":"2026-05-26T15:42:38Z","links":{"resolver":"https://pith.science/pith/PFGMFCMS7UDI7B4EUWFJ5AIB55","bundle":"https://pith.science/pith/PFGMFCMS7UDI7B4EUWFJ5AIB55/bundle.json","state":"https://pith.science/pith/PFGMFCMS7UDI7B4EUWFJ5AIB55/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PFGMFCMS7UDI7B4EUWFJ5AIB55/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:PFGMFCMS7UDI7B4EUWFJ5AIB55","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":"a31ef748b2e300cb3c301a2083050214f70c70c9e05c54dd5c679a5a1829865a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-25T14:12:58Z","title_canon_sha256":"b714c3f6d7a8914e8b019490a148df9a1e6b98b15683c4d40eaf547e66ea6287"},"schema_version":"1.0","source":{"id":"astro-ph/0609676","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0609676","created_at":"2026-05-18T04:28:57Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0609676v1","created_at":"2026-05-18T04:28:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0609676","created_at":"2026-05-18T04:28:57Z"},{"alias_kind":"pith_short_12","alias_value":"PFGMFCMS7UDI","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"PFGMFCMS7UDI7B4E","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"PFGMFCMS","created_at":"2026-05-18T12:25:54Z"}],"graph_snapshots":[{"event_id":"sha256:454eb30ad4191708927b5086fee6ef00ae8ae3a654f104d5483204503939df45","target":"graph","created_at":"2026-05-18T04:28:57Z","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 found a very likely counterpart to the recently discovered hard X-ray source IGR J2018+4043 in the multi-wavelength observations of the source field. The source, originally discovered in the 20-40 keV band, is now confidently detected also in the 40-80 keV band, with a flux of (1.4 +/- 0.4) x 10(-11) erg cm(-2) s(-1). A 5 ks Swift observation of the IGR J2018+4043 field revealed a hard point-like source with the observed 0.5-10 keV flux of 3.4(+0.7)(-0.8) x 10(-12) erg cm(-2) s(-1) (90% confidence level) at alpha = 20h18m38.55s, delta = +40d41m00.4s (with a 4.2\" uncertainty). The combined S","authors_text":"A.M.Bykov, A.M.Krassilchtchikov, E.B.Giacani, F.Lebrun, G.G.Pavlov, G.M.Dubner, G.Rauw, H.Bloemen, J.A.Kennea, J.Kaastra, J.-P.Swings, M.DeBecker, M.Renaud, R.Terrier, W.Hermsen, Yu.A.Uvarov","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-09-25T14:12:58Z","title":"On the nature of the hard X-ray source IGR J2018+4043"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0609676","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":"sha256:47e3b87f3b878bc3670abd288ece3340c04f2c0a35891b84f940ef2a8249e25c","target":"record","created_at":"2026-05-18T04:28:57Z","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":"a31ef748b2e300cb3c301a2083050214f70c70c9e05c54dd5c679a5a1829865a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-25T14:12:58Z","title_canon_sha256":"b714c3f6d7a8914e8b019490a148df9a1e6b98b15683c4d40eaf547e66ea6287"},"schema_version":"1.0","source":{"id":"astro-ph/0609676","kind":"arxiv","version":1}},"canonical_sha256":"794cc28992fd068f8784a58a9e8101ef7df79c1471b436687fc8f2d627bbbdcf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"794cc28992fd068f8784a58a9e8101ef7df79c1471b436687fc8f2d627bbbdcf","first_computed_at":"2026-05-18T04:28:57.598610Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:28:57.598610Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mi60NfuSOquabFJdCIxt/skfYGZ5n/fzzYJXL4+b6DoFxb2/UZi5vnyY8vYYqv0VqcvQ7kwUksxfJG9PRGkABQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:28:57.599087Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0609676","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:47e3b87f3b878bc3670abd288ece3340c04f2c0a35891b84f940ef2a8249e25c","sha256:454eb30ad4191708927b5086fee6ef00ae8ae3a654f104d5483204503939df45"],"state_sha256":"0609928058397d5d485788b5d4e02bfbe22edc660071ac76a7dab2714fb98771"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Yj0m1vjOi1hOpfQIzPL7Y3UJincUfexh1+P1f9cMP1OIHiyMWI1Vztl8owczliqyp3kHQwGE924l9ptdbPlECg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T15:42:38.613901Z","bundle_sha256":"d7233a9914be0ff3029b58017a148b3e7a3aff2a82c99378099b072397648fe1"}}