{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:GHG2KRWLABKI6AZEH5MV35VX62","short_pith_number":"pith:GHG2KRWL","canonical_record":{"source":{"id":"1705.10297","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-05-29T17:33:12Z","cross_cats_sorted":["astro-ph.GA","astro-ph.SR"],"title_canon_sha256":"b5e52424af2077c95090dab6515ed23c7c6e5265ed9f6f8f323506f2a5c32268","abstract_canon_sha256":"e969b32ef32c909adb2f865db0d90a72dd0bb84e3b46beda6456f6a2e23807eb"},"schema_version":"1.0"},"canonical_sha256":"31cda546cb00548f03243f595df6b7f6a43def45b4d30b3bb167f093a83bf875","source":{"kind":"arxiv","id":"1705.10297","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.10297","created_at":"2026-05-18T00:28:55Z"},{"alias_kind":"arxiv_version","alias_value":"1705.10297v2","created_at":"2026-05-18T00:28:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.10297","created_at":"2026-05-18T00:28:55Z"},{"alias_kind":"pith_short_12","alias_value":"GHG2KRWLABKI","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_16","alias_value":"GHG2KRWLABKI6AZE","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_8","alias_value":"GHG2KRWL","created_at":"2026-05-18T12:31:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:GHG2KRWLABKI6AZEH5MV35VX62","target":"record","payload":{"canonical_record":{"source":{"id":"1705.10297","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-05-29T17:33:12Z","cross_cats_sorted":["astro-ph.GA","astro-ph.SR"],"title_canon_sha256":"b5e52424af2077c95090dab6515ed23c7c6e5265ed9f6f8f323506f2a5c32268","abstract_canon_sha256":"e969b32ef32c909adb2f865db0d90a72dd0bb84e3b46beda6456f6a2e23807eb"},"schema_version":"1.0"},"canonical_sha256":"31cda546cb00548f03243f595df6b7f6a43def45b4d30b3bb167f093a83bf875","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:28:55.551495Z","signature_b64":"81eLzx/++IERakZq3iZeV73BQaFf6wQihkFiyQ2tYEq3rpgNlv8kJsegr2L3VCBHD89BC8EEmo75ba1xC/yyAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"31cda546cb00548f03243f595df6b7f6a43def45b4d30b3bb167f093a83bf875","last_reissued_at":"2026-05-18T00:28:55.551028Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:28:55.551028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1705.10297","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:28:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UmJyOi3UDQCKaoE7Z7RPjdETCrjOmHVOlp1UmcBxA6a6At3V5SnCKlfDEJ5dG2ICM1tP97PsbvWNcAAJQ5NhDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:05:34.079614Z"},"content_sha256":"87b1a5f2b73822b00a45537845a24415f34b408a6aaed37da5eec5df41a8552b","schema_version":"1.0","event_id":"sha256:87b1a5f2b73822b00a45537845a24415f34b408a6aaed37da5eec5df41a8552b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:GHG2KRWLABKI6AZEH5MV35VX62","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Super-Eddington Accretion onto the Neutron Star NGC 7793 P13: Broadband X-ray Spectroscopy and Ultraluminous X-ray Sources","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"A. C. Fabian, A. Ptak, D. Barret, D. J. Walton, D. Stern, F. A. Harrison, F. Fuerst, L. Tao, M. Bachetti, M. Brightman, M. J. Middleton","submitted_at":"2017-05-29T17:33:12Z","abstract_excerpt":"We present a detailed, broadband X-ray spectral analysis of the ULX pulsar NGC 7793 P13, a known super-Eddington source, utilizing data from the $XMM$-$Newton$, $NuSTAR$ and $Chandra$ observatories. The broadband $XMM$-$Newton+NuSTAR$ spectrum of P13 is qualitatively similar to the rest of the ULX sample with broadband coverage, suggesting that additional ULXs in the known population may host neutron star accretors. Through time-averaged, phase-resolved and multi-epoch studies, we find that two non-pulsed thermal blackbody components with temperatures $\\sim$0.5 and $\\sim$1.5 keV are required t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.10297","kind":"arxiv","version":2},"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":"2026-05-18T00:28:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DYPtRrSJw8q2E8tOopt5piAS5iNFzYDAZDEapbNgApENmZvZ6m5MYLTuH1PPfHEGKY3SJxQYWJkddgHDgG9hBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:05:34.080100Z"},"content_sha256":"18a1adcca129e1c9883f15ac67e3e520fd60f33f493d981c013db4bf922ec8cd","schema_version":"1.0","event_id":"sha256:18a1adcca129e1c9883f15ac67e3e520fd60f33f493d981c013db4bf922ec8cd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GHG2KRWLABKI6AZEH5MV35VX62/bundle.json","state_url":"https://pith.science/pith/GHG2KRWLABKI6AZEH5MV35VX62/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GHG2KRWLABKI6AZEH5MV35VX62/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":"2026-05-25T08:05:34Z","links":{"resolver":"https://pith.science/pith/GHG2KRWLABKI6AZEH5MV35VX62","bundle":"https://pith.science/pith/GHG2KRWLABKI6AZEH5MV35VX62/bundle.json","state":"https://pith.science/pith/GHG2KRWLABKI6AZEH5MV35VX62/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GHG2KRWLABKI6AZEH5MV35VX62/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:GHG2KRWLABKI6AZEH5MV35VX62","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":"e969b32ef32c909adb2f865db0d90a72dd0bb84e3b46beda6456f6a2e23807eb","cross_cats_sorted":["astro-ph.GA","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-05-29T17:33:12Z","title_canon_sha256":"b5e52424af2077c95090dab6515ed23c7c6e5265ed9f6f8f323506f2a5c32268"},"schema_version":"1.0","source":{"id":"1705.10297","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.10297","created_at":"2026-05-18T00:28:55Z"},{"alias_kind":"arxiv_version","alias_value":"1705.10297v2","created_at":"2026-05-18T00:28:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.10297","created_at":"2026-05-18T00:28:55Z"},{"alias_kind":"pith_short_12","alias_value":"GHG2KRWLABKI","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_16","alias_value":"GHG2KRWLABKI6AZE","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_8","alias_value":"GHG2KRWL","created_at":"2026-05-18T12:31:18Z"}],"graph_snapshots":[{"event_id":"sha256:18a1adcca129e1c9883f15ac67e3e520fd60f33f493d981c013db4bf922ec8cd","target":"graph","created_at":"2026-05-18T00:28:55Z","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 present a detailed, broadband X-ray spectral analysis of the ULX pulsar NGC 7793 P13, a known super-Eddington source, utilizing data from the $XMM$-$Newton$, $NuSTAR$ and $Chandra$ observatories. The broadband $XMM$-$Newton+NuSTAR$ spectrum of P13 is qualitatively similar to the rest of the ULX sample with broadband coverage, suggesting that additional ULXs in the known population may host neutron star accretors. Through time-averaged, phase-resolved and multi-epoch studies, we find that two non-pulsed thermal blackbody components with temperatures $\\sim$0.5 and $\\sim$1.5 keV are required t","authors_text":"A. C. Fabian, A. Ptak, D. Barret, D. J. Walton, D. Stern, F. A. Harrison, F. Fuerst, L. Tao, M. Bachetti, M. Brightman, M. J. Middleton","cross_cats":["astro-ph.GA","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-05-29T17:33:12Z","title":"Super-Eddington Accretion onto the Neutron Star NGC 7793 P13: Broadband X-ray Spectroscopy and Ultraluminous X-ray Sources"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.10297","kind":"arxiv","version":2},"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":"sha256:87b1a5f2b73822b00a45537845a24415f34b408a6aaed37da5eec5df41a8552b","target":"record","created_at":"2026-05-18T00:28:55Z","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":"e969b32ef32c909adb2f865db0d90a72dd0bb84e3b46beda6456f6a2e23807eb","cross_cats_sorted":["astro-ph.GA","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-05-29T17:33:12Z","title_canon_sha256":"b5e52424af2077c95090dab6515ed23c7c6e5265ed9f6f8f323506f2a5c32268"},"schema_version":"1.0","source":{"id":"1705.10297","kind":"arxiv","version":2}},"canonical_sha256":"31cda546cb00548f03243f595df6b7f6a43def45b4d30b3bb167f093a83bf875","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"31cda546cb00548f03243f595df6b7f6a43def45b4d30b3bb167f093a83bf875","first_computed_at":"2026-05-18T00:28:55.551028Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:28:55.551028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"81eLzx/++IERakZq3iZeV73BQaFf6wQihkFiyQ2tYEq3rpgNlv8kJsegr2L3VCBHD89BC8EEmo75ba1xC/yyAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:28:55.551495Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.10297","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:87b1a5f2b73822b00a45537845a24415f34b408a6aaed37da5eec5df41a8552b","sha256:18a1adcca129e1c9883f15ac67e3e520fd60f33f493d981c013db4bf922ec8cd"],"state_sha256":"902987d469b24317db295df2a49a9f6eb0d9d143447460fd54ca9f511439c3c5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PlTsucP2McmEnIsq/8E4gaCOO39r9KyvH5dfGC1R4mx2Ez/R3JCob6SG+xjYZ/l6cmO70LNbxIpQh1PWTStzBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T08:05:34.084095Z","bundle_sha256":"a675f48b749aea7bffecdcbfea020134fbbcec4cc1f6d4a3779da1627a8077d0"}}