{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:IY3E5WNFAHEVXZP22TY5SYEBMY","short_pith_number":"pith:IY3E5WNF","canonical_record":{"source":{"id":"1101.4541","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-01-24T14:23:05Z","cross_cats_sorted":[],"title_canon_sha256":"bd983ce013dfc7603864ec4006f70eb10b04f8ff2eebc1466cc73573aea0d960","abstract_canon_sha256":"1319342d993da6be07473574fc6464c2ddc89fa9b3685daf8c53df70fa7578ae"},"schema_version":"1.0"},"canonical_sha256":"46364ed9a501c95be5fad4f1d9608166024d3feea58ba96dc114559e4420ecd9","source":{"kind":"arxiv","id":"1101.4541","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.4541","created_at":"2026-05-18T02:03:24Z"},{"alias_kind":"arxiv_version","alias_value":"1101.4541v1","created_at":"2026-05-18T02:03:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.4541","created_at":"2026-05-18T02:03:24Z"},{"alias_kind":"pith_short_12","alias_value":"IY3E5WNFAHEV","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"IY3E5WNFAHEVXZP2","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"IY3E5WNF","created_at":"2026-05-18T12:26:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:IY3E5WNFAHEVXZP22TY5SYEBMY","target":"record","payload":{"canonical_record":{"source":{"id":"1101.4541","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-01-24T14:23:05Z","cross_cats_sorted":[],"title_canon_sha256":"bd983ce013dfc7603864ec4006f70eb10b04f8ff2eebc1466cc73573aea0d960","abstract_canon_sha256":"1319342d993da6be07473574fc6464c2ddc89fa9b3685daf8c53df70fa7578ae"},"schema_version":"1.0"},"canonical_sha256":"46364ed9a501c95be5fad4f1d9608166024d3feea58ba96dc114559e4420ecd9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:03:24.788964Z","signature_b64":"NHA9VNO+kHYdzxbiUusIQBMFmm2iLMKiw7bPP2WEpN/u22uAYzQE1dO2fAWFMcDjoWXnkpsY7wR1lCMnqkanBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"46364ed9a501c95be5fad4f1d9608166024d3feea58ba96dc114559e4420ecd9","last_reissued_at":"2026-05-18T02:03:24.788497Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:03:24.788497Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1101.4541","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":"2026-05-18T02:03:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zG+i9wH2kRVrsgmTwoXRH1MDnWbWZpao/ppNpBalcf4tnE16g1TxtJ/FCjIgfqtAmVsXlLFjmhJJDqoFCBO1Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T12:40:50.426144Z"},"content_sha256":"8ba85ba978dbaf771e560a8582717f5c8d5f08dcabb2b3a2386477fec3025b6a","schema_version":"1.0","event_id":"sha256:8ba85ba978dbaf771e560a8582717f5c8d5f08dcabb2b3a2386477fec3025b6a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:IY3E5WNFAHEVXZP22TY5SYEBMY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Comparing Spectral Models for ULXs with NGC 4517 ULX1","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. C. Fabian, C. Done, D. J. Walton, J. C. Gladstone, M. D. Caballero-Garcia, M. J. Middleton, T. P. Roberts","submitted_at":"2011-01-24T14:23:05Z","abstract_excerpt":"We present the previously unanalysed high quality XMM-Newton spectrum of an ultraluminous X-ray source candidate in NGC 4517. As with other high quality ULX spectra, a downturn in the spectrum is observed at ~6 keV. Both of the recent disc reflection and Comptonisation interpretations of this feature are applied, in order to present a direct comparison, and are found to provide statistically equivalent representations of the current data. We find that the reflection model requires the accretion disc to have a highly super-solar iron abundance, while the Comptonisation model requires low temper"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.4541","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":"2026-05-18T02:03:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tHMpFsG5kW29d9hSITOgnOAKmY5yPPy946BnzNUNYwA+3QAfgjKWQi9bDW539mcgcn1VlDhtoOeF01+N/9suBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T12:40:50.426686Z"},"content_sha256":"5b449a1732323e8457df3ae828c384a1093753dbe918786f6b9b1062a8ac6fc5","schema_version":"1.0","event_id":"sha256:5b449a1732323e8457df3ae828c384a1093753dbe918786f6b9b1062a8ac6fc5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IY3E5WNFAHEVXZP22TY5SYEBMY/bundle.json","state_url":"https://pith.science/pith/IY3E5WNFAHEVXZP22TY5SYEBMY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IY3E5WNFAHEVXZP22TY5SYEBMY/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":"2026-05-25T12:40:50Z","links":{"resolver":"https://pith.science/pith/IY3E5WNFAHEVXZP22TY5SYEBMY","bundle":"https://pith.science/pith/IY3E5WNFAHEVXZP22TY5SYEBMY/bundle.json","state":"https://pith.science/pith/IY3E5WNFAHEVXZP22TY5SYEBMY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IY3E5WNFAHEVXZP22TY5SYEBMY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:IY3E5WNFAHEVXZP22TY5SYEBMY","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":"1319342d993da6be07473574fc6464c2ddc89fa9b3685daf8c53df70fa7578ae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-01-24T14:23:05Z","title_canon_sha256":"bd983ce013dfc7603864ec4006f70eb10b04f8ff2eebc1466cc73573aea0d960"},"schema_version":"1.0","source":{"id":"1101.4541","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.4541","created_at":"2026-05-18T02:03:24Z"},{"alias_kind":"arxiv_version","alias_value":"1101.4541v1","created_at":"2026-05-18T02:03:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.4541","created_at":"2026-05-18T02:03:24Z"},{"alias_kind":"pith_short_12","alias_value":"IY3E5WNFAHEV","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"IY3E5WNFAHEVXZP2","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"IY3E5WNF","created_at":"2026-05-18T12:26:32Z"}],"graph_snapshots":[{"event_id":"sha256:5b449a1732323e8457df3ae828c384a1093753dbe918786f6b9b1062a8ac6fc5","target":"graph","created_at":"2026-05-18T02:03:24Z","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 the previously unanalysed high quality XMM-Newton spectrum of an ultraluminous X-ray source candidate in NGC 4517. As with other high quality ULX spectra, a downturn in the spectrum is observed at ~6 keV. Both of the recent disc reflection and Comptonisation interpretations of this feature are applied, in order to present a direct comparison, and are found to provide statistically equivalent representations of the current data. We find that the reflection model requires the accretion disc to have a highly super-solar iron abundance, while the Comptonisation model requires low temper","authors_text":"A. C. Fabian, C. Done, D. J. Walton, J. C. Gladstone, M. D. Caballero-Garcia, M. J. Middleton, T. P. Roberts","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-01-24T14:23:05Z","title":"Comparing Spectral Models for ULXs with NGC 4517 ULX1"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.4541","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":"sha256:8ba85ba978dbaf771e560a8582717f5c8d5f08dcabb2b3a2386477fec3025b6a","target":"record","created_at":"2026-05-18T02:03:24Z","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":"1319342d993da6be07473574fc6464c2ddc89fa9b3685daf8c53df70fa7578ae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-01-24T14:23:05Z","title_canon_sha256":"bd983ce013dfc7603864ec4006f70eb10b04f8ff2eebc1466cc73573aea0d960"},"schema_version":"1.0","source":{"id":"1101.4541","kind":"arxiv","version":1}},"canonical_sha256":"46364ed9a501c95be5fad4f1d9608166024d3feea58ba96dc114559e4420ecd9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"46364ed9a501c95be5fad4f1d9608166024d3feea58ba96dc114559e4420ecd9","first_computed_at":"2026-05-18T02:03:24.788497Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:24.788497Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NHA9VNO+kHYdzxbiUusIQBMFmm2iLMKiw7bPP2WEpN/u22uAYzQE1dO2fAWFMcDjoWXnkpsY7wR1lCMnqkanBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:24.788964Z","signed_message":"canonical_sha256_bytes"},"source_id":"1101.4541","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8ba85ba978dbaf771e560a8582717f5c8d5f08dcabb2b3a2386477fec3025b6a","sha256:5b449a1732323e8457df3ae828c384a1093753dbe918786f6b9b1062a8ac6fc5"],"state_sha256":"d34e2164f8cda3e65cee90810c5724fe0657dab2e748dc8ef9d85e5880601ebb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RHk1JphEAv24WmeDhV1MzmsIz0UBPV8ALceFEq98Hio7EazOxR1smoVuUDO8chDrFVeJXdwufLyZouvFjfmnCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T12:40:50.430057Z","bundle_sha256":"30e53e1e1046041dd25bca9a12410e87d949858b8c1f9a49c35e4b6784655107"}}