{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:5XR4ATJTMA6GJDYQBJAGUUCPT4","short_pith_number":"pith:5XR4ATJT","canonical_record":{"source":{"id":"0912.1708","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-09T10:23:26Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"b66e3c0dc8c72b281333e49f7404428b274c06bc582348c206dc4583665688d4","abstract_canon_sha256":"f40dab9a1c5366500763f3442f926c03cfa5be642ad3564680a80c2e9ba72b62"},"schema_version":"1.0"},"canonical_sha256":"ede3c04d33603c648f100a406a504f9f2728bb77dd39d560b6bba53d93ed1e8c","source":{"kind":"arxiv","id":"0912.1708","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.1708","created_at":"2026-05-18T02:10:25Z"},{"alias_kind":"arxiv_version","alias_value":"0912.1708v1","created_at":"2026-05-18T02:10:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.1708","created_at":"2026-05-18T02:10:25Z"},{"alias_kind":"pith_short_12","alias_value":"5XR4ATJTMA6G","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"5XR4ATJTMA6GJDYQ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"5XR4ATJT","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:5XR4ATJTMA6GJDYQBJAGUUCPT4","target":"record","payload":{"canonical_record":{"source":{"id":"0912.1708","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-09T10:23:26Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"b66e3c0dc8c72b281333e49f7404428b274c06bc582348c206dc4583665688d4","abstract_canon_sha256":"f40dab9a1c5366500763f3442f926c03cfa5be642ad3564680a80c2e9ba72b62"},"schema_version":"1.0"},"canonical_sha256":"ede3c04d33603c648f100a406a504f9f2728bb77dd39d560b6bba53d93ed1e8c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:10:25.364527Z","signature_b64":"cLSvMSt+/COoeLba0Vz6Nu8otkHkzQPCFwAT0+Me5NrN7EpgiHNfFzFCdWym7kET5gW9V2GOHwsYU3rhS1J5CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ede3c04d33603c648f100a406a504f9f2728bb77dd39d560b6bba53d93ed1e8c","last_reissued_at":"2026-05-18T02:10:25.363621Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:10:25.363621Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0912.1708","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":"2026-05-18T02:10:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RM5m9VvN1pqCPt00QRrHCL+8FHA2IaxP3vs63uDh957DlKY9ZXL9PW9l+3/OJ5ymHXfFpnvkLZ9CY/jDlELYAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T16:44:22.470233Z"},"content_sha256":"3ff3758af2fd57b3e7c957604fca824839e1ef7ede536766718b2d3e19f0cfc9","schema_version":"1.0","event_id":"sha256:3ff3758af2fd57b3e7c957604fca824839e1ef7ede536766718b2d3e19f0cfc9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:5XR4ATJTMA6GJDYQBJAGUUCPT4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Heavily obscured AGN in the local Universe","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"A. Caccianiga, A. Moretti, C. Vignali, G. Cusumano, P. Severgnini, R. Della Ceca, V. La Parola","submitted_at":"2009-12-09T10:23:26Z","abstract_excerpt":"We present here a new powerful diagnostic plot to select heavily obscured AGN in the local universe by combining infrared (Spitzer, IRAS) and X-ray (XMM) information. On the basis of this plot, we selected a sample of X-ray obscured sources in the 2XMM catalogue and found seven newly discovered Compton-thick AGN candidates."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.1708","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":"2026-05-18T02:10:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J5iL/s3prrp+uk1gR01I3Szx4t3VWvpAtzvgJwrjErFDIXCSe/jObRJN5ruE66+wsQ7VQyibYBZ63oBxG1rRBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T16:44:22.470963Z"},"content_sha256":"2fbe7509dab2f9fc53ef350fa0a57ad748c43a9bc3e08d9b2245897d220f64d2","schema_version":"1.0","event_id":"sha256:2fbe7509dab2f9fc53ef350fa0a57ad748c43a9bc3e08d9b2245897d220f64d2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5XR4ATJTMA6GJDYQBJAGUUCPT4/bundle.json","state_url":"https://pith.science/pith/5XR4ATJTMA6GJDYQBJAGUUCPT4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5XR4ATJTMA6GJDYQBJAGUUCPT4/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":"2026-05-23T16:44:22Z","links":{"resolver":"https://pith.science/pith/5XR4ATJTMA6GJDYQBJAGUUCPT4","bundle":"https://pith.science/pith/5XR4ATJTMA6GJDYQBJAGUUCPT4/bundle.json","state":"https://pith.science/pith/5XR4ATJTMA6GJDYQBJAGUUCPT4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5XR4ATJTMA6GJDYQBJAGUUCPT4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:5XR4ATJTMA6GJDYQBJAGUUCPT4","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":"f40dab9a1c5366500763f3442f926c03cfa5be642ad3564680a80c2e9ba72b62","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-09T10:23:26Z","title_canon_sha256":"b66e3c0dc8c72b281333e49f7404428b274c06bc582348c206dc4583665688d4"},"schema_version":"1.0","source":{"id":"0912.1708","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.1708","created_at":"2026-05-18T02:10:25Z"},{"alias_kind":"arxiv_version","alias_value":"0912.1708v1","created_at":"2026-05-18T02:10:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.1708","created_at":"2026-05-18T02:10:25Z"},{"alias_kind":"pith_short_12","alias_value":"5XR4ATJTMA6G","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"5XR4ATJTMA6GJDYQ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"5XR4ATJT","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:2fbe7509dab2f9fc53ef350fa0a57ad748c43a9bc3e08d9b2245897d220f64d2","target":"graph","created_at":"2026-05-18T02:10:25Z","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 here a new powerful diagnostic plot to select heavily obscured AGN in the local universe by combining infrared (Spitzer, IRAS) and X-ray (XMM) information. On the basis of this plot, we selected a sample of X-ray obscured sources in the 2XMM catalogue and found seven newly discovered Compton-thick AGN candidates.","authors_text":"A. Caccianiga, A. Moretti, C. Vignali, G. Cusumano, P. Severgnini, R. Della Ceca, V. La Parola","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-09T10:23:26Z","title":"Heavily obscured AGN in the local Universe"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.1708","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":"sha256:3ff3758af2fd57b3e7c957604fca824839e1ef7ede536766718b2d3e19f0cfc9","target":"record","created_at":"2026-05-18T02:10:25Z","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":"f40dab9a1c5366500763f3442f926c03cfa5be642ad3564680a80c2e9ba72b62","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-09T10:23:26Z","title_canon_sha256":"b66e3c0dc8c72b281333e49f7404428b274c06bc582348c206dc4583665688d4"},"schema_version":"1.0","source":{"id":"0912.1708","kind":"arxiv","version":1}},"canonical_sha256":"ede3c04d33603c648f100a406a504f9f2728bb77dd39d560b6bba53d93ed1e8c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ede3c04d33603c648f100a406a504f9f2728bb77dd39d560b6bba53d93ed1e8c","first_computed_at":"2026-05-18T02:10:25.363621Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:10:25.363621Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cLSvMSt+/COoeLba0Vz6Nu8otkHkzQPCFwAT0+Me5NrN7EpgiHNfFzFCdWym7kET5gW9V2GOHwsYU3rhS1J5CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:10:25.364527Z","signed_message":"canonical_sha256_bytes"},"source_id":"0912.1708","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3ff3758af2fd57b3e7c957604fca824839e1ef7ede536766718b2d3e19f0cfc9","sha256:2fbe7509dab2f9fc53ef350fa0a57ad748c43a9bc3e08d9b2245897d220f64d2"],"state_sha256":"2a0befa8a3f9ea738b01c8fee2c84ee72b1ac1cf9380da82632721a9913a0714"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Rycmt/V51TovWBmfxG/zveb7JsQ6SL8w2BGJiCITEqKfN2a3/jpCC43wYCVy5ObVS+KnupC7vfvAYGas8ljmCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T16:44:22.474976Z","bundle_sha256":"492d12099402bc925eff2f904c3990e8d74a04529dd827555448b5868f327450"}}