{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:L3TKTFQ4QQLTYSNUAS7USZCW4O","short_pith_number":"pith:L3TKTFQ4","canonical_record":{"source":{"id":"1901.07594","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-01-22T19:52:25Z","cross_cats_sorted":[],"title_canon_sha256":"175488339f48707ef0de7509adecef3ea18e33a75255a94d02cd2d90ae1507ce","abstract_canon_sha256":"e4c6547f58e9d3c007b41ab3d05029d17f2ced13ee148ec76fb204baf8815f63"},"schema_version":"1.0"},"canonical_sha256":"5ee6a9961c84173c49b404bf496456e39b2d5d100f94a3c4a0933d1696bf499b","source":{"kind":"arxiv","id":"1901.07594","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.07594","created_at":"2026-05-17T23:55:16Z"},{"alias_kind":"arxiv_version","alias_value":"1901.07594v1","created_at":"2026-05-17T23:55:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.07594","created_at":"2026-05-17T23:55:16Z"},{"alias_kind":"pith_short_12","alias_value":"L3TKTFQ4QQLT","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"L3TKTFQ4QQLTYSNU","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"L3TKTFQ4","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:L3TKTFQ4QQLTYSNUAS7USZCW4O","target":"record","payload":{"canonical_record":{"source":{"id":"1901.07594","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-01-22T19:52:25Z","cross_cats_sorted":[],"title_canon_sha256":"175488339f48707ef0de7509adecef3ea18e33a75255a94d02cd2d90ae1507ce","abstract_canon_sha256":"e4c6547f58e9d3c007b41ab3d05029d17f2ced13ee148ec76fb204baf8815f63"},"schema_version":"1.0"},"canonical_sha256":"5ee6a9961c84173c49b404bf496456e39b2d5d100f94a3c4a0933d1696bf499b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:16.742813Z","signature_b64":"bjmqgnJPfttNk1plwwuigNRUKXh0So8WFhM3q4ZnDLmvn5RpwofvFZtPq+oxcMJAv3mlnEf7RgcyqeXFI0hzCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5ee6a9961c84173c49b404bf496456e39b2d5d100f94a3c4a0933d1696bf499b","last_reissued_at":"2026-05-17T23:55:16.742333Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:16.742333Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.07594","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":"2026-05-17T23:55:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tWqlCodlRY3si8tAPZ7X9eSHsdO5IfHZkQ/KRHRW127iZlfPL1iJZ82ctUvqAPnIBwgBZA1V8r2t/VM7aRJgAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T02:22:03.691107Z"},"content_sha256":"ceb535ee1efc488a1cbfdc9e50490d2a11a900326d8864412e0828fe3b2a1bf3","schema_version":"1.0","event_id":"sha256:ceb535ee1efc488a1cbfdc9e50490d2a11a900326d8864412e0828fe3b2a1bf3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:L3TKTFQ4QQLTYSNUAS7USZCW4O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Study of X-ray variability and coronae of Seyfert galaxies using NuSTAR","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"C. S. Stalin, K. D. Goswami, Priyanka Rani","submitted_at":"2019-01-22T19:52:25Z","abstract_excerpt":"The primary X-ray emission in active galactic nuclei (AGN) originates in a compact region called the corona located very close to the super-massive black hole and the accretion disk. The knowledge of the cut-off energy ($E_{cut}$) of the primary X-ray continuum in an AGN is very important as it carries information on the physical characteristics of the hot X-ray emitting corona. We present here the results of our investigation on the spectral properties of a sample of 10 nearby AGN (0.005 $<$ $z$ $<$ 0.037) observed with the {\\it Nuclear Spectroscopic Telescope Array (NuSTAR)} . From fitting o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07594","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":"2026-05-17T23:55:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6Fc3LlK4FOcVQfEGivr1LbmQmYLOcSdDH+Z4MHCKgZDKhQ5dD5/YzgKhKSIbfSVrei+z9S4S4uFIFQ99iwsdCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T02:22:03.691470Z"},"content_sha256":"e2ce413bdb2e8cdf35824e84c135bb6ed8978e180cdd9daaa18ac6882f811d70","schema_version":"1.0","event_id":"sha256:e2ce413bdb2e8cdf35824e84c135bb6ed8978e180cdd9daaa18ac6882f811d70"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L3TKTFQ4QQLTYSNUAS7USZCW4O/bundle.json","state_url":"https://pith.science/pith/L3TKTFQ4QQLTYSNUAS7USZCW4O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L3TKTFQ4QQLTYSNUAS7USZCW4O/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":"2026-06-20T02:22:03Z","links":{"resolver":"https://pith.science/pith/L3TKTFQ4QQLTYSNUAS7USZCW4O","bundle":"https://pith.science/pith/L3TKTFQ4QQLTYSNUAS7USZCW4O/bundle.json","state":"https://pith.science/pith/L3TKTFQ4QQLTYSNUAS7USZCW4O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L3TKTFQ4QQLTYSNUAS7USZCW4O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:L3TKTFQ4QQLTYSNUAS7USZCW4O","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":"e4c6547f58e9d3c007b41ab3d05029d17f2ced13ee148ec76fb204baf8815f63","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-01-22T19:52:25Z","title_canon_sha256":"175488339f48707ef0de7509adecef3ea18e33a75255a94d02cd2d90ae1507ce"},"schema_version":"1.0","source":{"id":"1901.07594","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.07594","created_at":"2026-05-17T23:55:16Z"},{"alias_kind":"arxiv_version","alias_value":"1901.07594v1","created_at":"2026-05-17T23:55:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.07594","created_at":"2026-05-17T23:55:16Z"},{"alias_kind":"pith_short_12","alias_value":"L3TKTFQ4QQLT","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"L3TKTFQ4QQLTYSNU","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"L3TKTFQ4","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:e2ce413bdb2e8cdf35824e84c135bb6ed8978e180cdd9daaa18ac6882f811d70","target":"graph","created_at":"2026-05-17T23:55:16Z","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":"The primary X-ray emission in active galactic nuclei (AGN) originates in a compact region called the corona located very close to the super-massive black hole and the accretion disk. The knowledge of the cut-off energy ($E_{cut}$) of the primary X-ray continuum in an AGN is very important as it carries information on the physical characteristics of the hot X-ray emitting corona. We present here the results of our investigation on the spectral properties of a sample of 10 nearby AGN (0.005 $<$ $z$ $<$ 0.037) observed with the {\\it Nuclear Spectroscopic Telescope Array (NuSTAR)} . From fitting o","authors_text":"C. S. Stalin, K. D. Goswami, Priyanka Rani","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-01-22T19:52:25Z","title":"Study of X-ray variability and coronae of Seyfert galaxies using NuSTAR"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07594","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:ceb535ee1efc488a1cbfdc9e50490d2a11a900326d8864412e0828fe3b2a1bf3","target":"record","created_at":"2026-05-17T23:55:16Z","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":"e4c6547f58e9d3c007b41ab3d05029d17f2ced13ee148ec76fb204baf8815f63","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-01-22T19:52:25Z","title_canon_sha256":"175488339f48707ef0de7509adecef3ea18e33a75255a94d02cd2d90ae1507ce"},"schema_version":"1.0","source":{"id":"1901.07594","kind":"arxiv","version":1}},"canonical_sha256":"5ee6a9961c84173c49b404bf496456e39b2d5d100f94a3c4a0933d1696bf499b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5ee6a9961c84173c49b404bf496456e39b2d5d100f94a3c4a0933d1696bf499b","first_computed_at":"2026-05-17T23:55:16.742333Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:16.742333Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bjmqgnJPfttNk1plwwuigNRUKXh0So8WFhM3q4ZnDLmvn5RpwofvFZtPq+oxcMJAv3mlnEf7RgcyqeXFI0hzCA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:16.742813Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.07594","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ceb535ee1efc488a1cbfdc9e50490d2a11a900326d8864412e0828fe3b2a1bf3","sha256:e2ce413bdb2e8cdf35824e84c135bb6ed8978e180cdd9daaa18ac6882f811d70"],"state_sha256":"322b0ef31f1d53b97859726f30c1b29a1f2cd1876d6718f88b59087418fbe9d2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4ciG2kYojW+MAt99GtHav03611ECl8ydZycBUqJkt8pl6v6TaXTs9g+dNeP7+fKXepuHjd+PLCD5R2EXNz5HDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-20T02:22:03.693409Z","bundle_sha256":"cb2edd033555dbb77178fff37b02e8e88bd0c97b5c69616fb21c05a50c59ee2d"}}